BLACKROCK INSTITUTIONAL TRUST COMPANY, N.A. has sponsored the creation of one or more 401k plans.
Submission information for form 5500 for 401k plan MORTGAGE-BACKED SECURITIES INDEX FUND
| Measure | Date | Value |
|---|
| 2023 : MORTGAGE-BACKED SECURITIES INDEX FUND 2023 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-12-31 | $636,532,287 |
| Total unrealized appreciation/depreciation of assets | 2023-12-31 | $636,532,287 |
| Total transfer of assets to this plan | 2023-12-31 | $5,928,590,167 |
| Total transfer of assets from this plan | 2023-12-31 | $3,696,298,346 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $2,488,277,954 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $3,414,117,602 |
| Expenses. Interest paid | 2023-12-31 | $454,193 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2023-12-31 | $454,193 |
| Total income from all sources (including contributions) | 2023-12-31 | $1,580,331,691 |
| Total loss/gain on sale of assets | 2023-12-31 | $-114,266,104 |
| Total of all expenses incurred | 2023-12-31 | $1,357,389 |
| Value of total assets at end of year | 2023-12-31 | $35,891,734,820 |
| Value of total assets at beginning of year | 2023-12-31 | $33,006,308,345 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-12-31 | $903,196 |
| Total interest from all sources | 2023-12-31 | $1,058,065,508 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2023-12-31 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2023-12-31 | $309,976,914 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-12-31 | $485,711,458 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-12-31 | $2,488,277,954 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-12-31 | $3,414,117,602 |
| Administrative expenses (other) incurred | 2023-12-31 | $3,300 |
| Total non interest bearing cash at end of year | 2023-12-31 | $977,436 |
| Total non interest bearing cash at beginning of year | 2023-12-31 | $2,931,743 |
| Value of net income/loss | 2023-12-31 | $1,578,974,302 |
| Value of net assets at end of year (total assets less liabilities) | 2023-12-31 | $33,403,456,866 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-12-31 | $29,592,190,743 |
| Investment advisory and management fees | 2023-12-31 | $884,168 |
| Income. Interest from US Government securities | 2023-12-31 | $906,211,112 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-12-31 | $2,296,043,297 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2023-12-31 | $2,862,582,519 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2023-12-31 | $2,862,582,519 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-12-31 | $151,854,396 |
| Asset value of US Government securities at end of year | 2023-12-31 | $33,284,737,173 |
| Asset value of US Government securities at beginning of year | 2023-12-31 | $29,655,082,625 |
| Aggregate proceeds on sale of assets | 2023-12-31 | $72,862,015,878 |
| Aggregate carrying amount (costs) on sale of assets | 2023-12-31 | $72,976,281,982 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-01-01 | $636,532,287 |
| Total unrealized appreciation/depreciation of assets | 2023-01-01 | $636,532,287 |
| Total transfer of assets to this plan | 2023-01-01 | $5,928,590,167 |
| Total transfer of assets from this plan | 2023-01-01 | $3,696,298,346 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $2,488,277,954 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $3,414,117,602 |
| Total income from all sources (including contributions) | 2023-01-01 | $1,580,331,691 |
| Total loss/gain on sale of assets | 2023-01-01 | $-114,266,104 |
| Total of all expenses incurred | 2023-01-01 | $1,357,389 |
| Value of total assets at end of year | 2023-01-01 | $35,891,734,820 |
| Value of total assets at beginning of year | 2023-01-01 | $33,006,308,345 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-01-01 | $903,196 |
| Total interest from all sources | 2023-01-01 | $1,058,065,508 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2023-01-01 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2023-01-01 | $309,976,914 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-01-01 | $485,711,458 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-01-01 | $2,488,277,954 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-01-01 | $3,414,117,602 |
| Administrative expenses (other) incurred | 2023-01-01 | $3,300 |
| Total non interest bearing cash at end of year | 2023-01-01 | $977,436 |
| Total non interest bearing cash at beginning of year | 2023-01-01 | $2,931,743 |
| Value of net income/loss | 2023-01-01 | $1,578,974,302 |
| Value of net assets at end of year (total assets less liabilities) | 2023-01-01 | $33,403,456,866 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-01-01 | $29,592,190,743 |
| Investment advisory and management fees | 2023-01-01 | $884,168 |
| Income. Interest from US Government securities | 2023-01-01 | $906,211,112 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-01-01 | $2,296,043,297 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-01-01 | $151,854,396 |
| Asset value of US Government securities at end of year | 2023-01-01 | $33,284,737,173 |
| Asset value of US Government securities at beginning of year | 2023-01-01 | $29,655,082,625 |
| Aggregate proceeds on sale of assets | 2023-01-01 | $72,862,015,878 |
| Aggregate carrying amount (costs) on sale of assets | 2023-01-01 | $72,976,281,982 |
| 2022 : MORTGAGE-BACKED SECURITIES INDEX FUND 2022 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-12-31 | $-4,112,666,916 |
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $-4,112,666,916 |
| Total transfer of assets to this plan | 2022-12-31 | $18,203,309,304 |
| Total transfer of assets from this plan | 2022-12-31 | $21,008,525,023 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $3,414,117,602 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $12,106,558,900 |
| Expenses. Interest paid | 2022-12-31 | $186,669 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2022-12-31 | $186,669 |
| Total income from all sources (including contributions) | 2022-12-31 | $-4,226,975,022 |
| Total loss/gain on sale of assets | 2022-12-31 | $-831,119,080 |
| Total of all expenses incurred | 2022-12-31 | $1,042,813 |
| Value of total assets at end of year | 2022-12-31 | $33,006,308,345 |
| Value of total assets at beginning of year | 2022-12-31 | $48,731,983,197 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $856,144 |
| Total interest from all sources | 2022-12-31 | $716,810,974 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2022-12-31 | No |
| Administrative expenses professional fees incurred | 2022-12-31 | $15,949 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-12-31 | $485,711,458 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-12-31 | $1,500,273,630 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-12-31 | $3,414,117,602 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-12-31 | $12,106,558,900 |
| Administrative expenses (other) incurred | 2022-12-31 | $3,300 |
| Total non interest bearing cash at end of year | 2022-12-31 | $2,931,743 |
| Total non interest bearing cash at beginning of year | 2022-12-31 | $77,510 |
| Value of net income/loss | 2022-12-31 | $-4,228,017,835 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $29,592,190,743 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $36,625,424,297 |
| Investment advisory and management fees | 2022-12-31 | $836,895 |
| Income. Interest from US Government securities | 2022-12-31 | $640,067,573 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-12-31 | $2,862,582,519 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2022-12-31 | $10,539,934,692 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2022-12-31 | $10,539,934,692 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-12-31 | $76,743,401 |
| Asset value of US Government securities at end of year | 2022-12-31 | $29,655,082,625 |
| Asset value of US Government securities at beginning of year | 2022-12-31 | $36,691,697,365 |
| Aggregate proceeds on sale of assets | 2022-12-31 | $131,335,185,923 |
| Aggregate carrying amount (costs) on sale of assets | 2022-12-31 | $132,166,305,003 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-01-01 | $-4,112,666,916 |
| Total unrealized appreciation/depreciation of assets | 2022-01-01 | $-4,112,666,916 |
| Total transfer of assets to this plan | 2022-01-01 | $18,203,309,304 |
| Total transfer of assets from this plan | 2022-01-01 | $21,008,525,023 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $3,414,117,602 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $12,106,558,900 |
| Total income from all sources (including contributions) | 2022-01-01 | $-4,226,975,022 |
| Total loss/gain on sale of assets | 2022-01-01 | $-831,119,080 |
| Total of all expenses incurred | 2022-01-01 | $1,042,813 |
| Value of total assets at end of year | 2022-01-01 | $33,006,308,345 |
| Value of total assets at beginning of year | 2022-01-01 | $48,731,983,197 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-01-01 | $856,144 |
| Total interest from all sources | 2022-01-01 | $716,810,974 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2022-01-01 | No |
| Administrative expenses professional fees incurred | 2022-01-01 | $15,949 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-01-01 | $485,711,458 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-01-01 | $1,500,273,630 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-01-01 | $3,414,117,602 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-01-01 | $12,106,558,900 |
| Administrative expenses (other) incurred | 2022-01-01 | $3,300 |
| Total non interest bearing cash at end of year | 2022-01-01 | $2,931,743 |
| Total non interest bearing cash at beginning of year | 2022-01-01 | $77,510 |
| Value of net income/loss | 2022-01-01 | $-4,228,017,835 |
| Value of net assets at end of year (total assets less liabilities) | 2022-01-01 | $29,592,190,743 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-01-01 | $36,625,424,297 |
| Investment advisory and management fees | 2022-01-01 | $836,895 |
| Income. Interest from US Government securities | 2022-01-01 | $640,067,573 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-01-01 | $2,862,582,519 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-01-01 | $76,743,401 |
| Asset value of US Government securities at end of year | 2022-01-01 | $29,655,082,625 |
| Asset value of US Government securities at beginning of year | 2022-01-01 | $36,691,697,365 |
| Aggregate proceeds on sale of assets | 2022-01-01 | $131,335,185,923 |
| Aggregate carrying amount (costs) on sale of assets | 2022-01-01 | $132,166,305,003 |
| 2021 : MORTGAGE-BACKED SECURITIES INDEX FUND 2021 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2021-12-31 | $-685,747,943 |
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $-685,747,943 |
| Total transfer of assets to this plan | 2021-12-31 | $9,505,892,535 |
| Total transfer of assets from this plan | 2021-12-31 | $5,108,684,939 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $12,106,558,900 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $12,729,576,075 |
| Total income from all sources (including contributions) | 2021-12-31 | $-371,827,409 |
| Total loss/gain on sale of assets | 2021-12-31 | $-93,200,438 |
| Total of all expenses incurred | 2021-12-31 | $760,384 |
| Value of total assets at end of year | 2021-12-31 | $48,731,983,197 |
| Value of total assets at beginning of year | 2021-12-31 | $45,330,380,569 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $760,384 |
| Total interest from all sources | 2021-12-31 | $407,120,972 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2021-12-31 | No |
| Administrative expenses professional fees incurred | 2021-12-31 | $17,195 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $1,500,273,630 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $2,277,603,750 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2021-12-31 | $12,106,558,900 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2021-12-31 | $12,729,576,075 |
| Administrative expenses (other) incurred | 2021-12-31 | $3,300 |
| Total non interest bearing cash at end of year | 2021-12-31 | $77,510 |
| Value of net income/loss | 2021-12-31 | $-372,587,793 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $36,625,424,297 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $32,600,804,494 |
| Investment advisory and management fees | 2021-12-31 | $739,889 |
| Income. Interest from US Government securities | 2021-12-31 | $381,499,961 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2021-12-31 | $10,539,934,692 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2021-12-31 | $9,832,036,154 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2021-12-31 | $9,832,036,154 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2021-12-31 | $25,621,011 |
| Asset value of US Government securities at end of year | 2021-12-31 | $36,691,697,365 |
| Asset value of US Government securities at beginning of year | 2021-12-31 | $33,220,740,665 |
| Aggregate proceeds on sale of assets | 2021-12-31 | $236,202,188,938 |
| Aggregate carrying amount (costs) on sale of assets | 2021-12-31 | $236,295,389,376 |
| 2020 : MORTGAGE-BACKED SECURITIES INDEX FUND 2020 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2020-12-31 | $352,774,494 |
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $352,774,494 |
| Total transfer of assets to this plan | 2020-12-31 | $9,774,158,465 |
| Total transfer of assets from this plan | 2020-12-31 | $5,614,153,292 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $12,729,576,075 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $5,328,032,802 |
| Expenses. Interest paid | 2020-12-31 | $46,191 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2020-12-31 | $46,191 |
| Total income from all sources (including contributions) | 2020-12-31 | $1,082,147,056 |
| Total loss/gain on sale of assets | 2020-12-31 | $189,358,309 |
| Total of all expenses incurred | 2020-12-31 | $749,036 |
| Value of total assets at end of year | 2020-12-31 | $45,330,380,569 |
| Value of total assets at beginning of year | 2020-12-31 | $32,687,434,103 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $702,845 |
| Total interest from all sources | 2020-12-31 | $540,014,253 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2020-12-31 | No |
| Administrative expenses professional fees incurred | 2020-12-31 | $16,853 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $2,277,603,750 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $1,083,707,390 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2020-12-31 | $12,729,576,075 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2020-12-31 | $5,328,032,802 |
| Administrative expenses (other) incurred | 2020-12-31 | $3,300 |
| Value of net income/loss | 2020-12-31 | $1,081,398,020 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $32,600,804,494 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $27,359,401,301 |
| Investment advisory and management fees | 2020-12-31 | $682,692 |
| Income. Interest from US Government securities | 2020-12-31 | $498,208,635 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2020-12-31 | $9,832,036,154 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2020-12-31 | $3,983,200,614 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2020-12-31 | $3,983,200,614 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2020-12-31 | $41,805,618 |
| Asset value of US Government securities at end of year | 2020-12-31 | $33,220,740,665 |
| Asset value of US Government securities at beginning of year | 2020-12-31 | $27,620,526,099 |
| Aggregate proceeds on sale of assets | 2020-12-31 | $170,353,132,433 |
| Aggregate carrying amount (costs) on sale of assets | 2020-12-31 | $170,163,774,124 |
| 2019 : MORTGAGE-BACKED SECURITIES INDEX FUND 2019 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $667,368,216 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $667,368,216 |
| Total transfer of assets to this plan | 2019-12-31 | $5,710,459,037 |
| Total transfer of assets from this plan | 2019-12-31 | $4,430,948,055 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $5,328,032,802 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $5,114,371,457 |
| Expenses. Interest paid | 2019-12-31 | $198,501 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2019-12-31 | $198,501 |
| Total income from all sources (including contributions) | 2019-12-31 | $1,546,466,519 |
| Total loss/gain on sale of assets | 2019-12-31 | $130,697,968 |
| Total of all expenses incurred | 2019-12-31 | $841,978 |
| Value of total assets at end of year | 2019-12-31 | $32,687,434,103 |
| Value of total assets at beginning of year | 2019-12-31 | $29,648,637,235 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $643,477 |
| Total interest from all sources | 2019-12-31 | $748,400,335 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2019-12-31 | No |
| Administrative expenses professional fees incurred | 2019-12-31 | $18,896 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $1,083,707,390 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $673,538,692 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $5,328,032,802 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $5,114,371,457 |
| Total non interest bearing cash at beginning of year | 2019-12-31 | $1,561,008 |
| Value of net income/loss | 2019-12-31 | $1,545,624,541 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $27,359,401,301 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $24,534,265,778 |
| Investment advisory and management fees | 2019-12-31 | $624,581 |
| Income. Interest from US Government securities | 2019-12-31 | $647,108,630 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $3,983,200,614 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $4,209,682,660 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $4,209,682,660 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $101,291,705 |
| Asset value of US Government securities at end of year | 2019-12-31 | $27,620,526,099 |
| Asset value of US Government securities at beginning of year | 2019-12-31 | $24,763,854,875 |
| Aggregate proceeds on sale of assets | 2019-12-31 | $102,566,650,669 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $102,435,952,701 |
| 2018 : MORTGAGE-BACKED SECURITIES INDEX FUND 2018 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2018-12-31 | $-112,286,382 |
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $-112,286,382 |
| Total transfer of assets to this plan | 2018-12-31 | $5,324,795,482 |
| Total transfer of assets from this plan | 2018-12-31 | $3,801,948,770 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $5,114,371,457 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $8,876,399,964 |
| Expenses. Interest paid | 2018-12-31 | $84,204 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2018-12-31 | $84,204 |
| Total income from all sources (including contributions) | 2018-12-31 | $257,472,412 |
| Total loss/gain on sale of assets | 2018-12-31 | $-323,390,225 |
| Total of all expenses incurred | 2018-12-31 | $868,588 |
| Value of total assets at end of year | 2018-12-31 | $29,648,637,235 |
| Value of total assets at beginning of year | 2018-12-31 | $31,631,215,206 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $784,384 |
| Total interest from all sources | 2018-12-31 | $693,149,019 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2018-12-31 | No |
| Administrative expenses professional fees incurred | 2018-12-31 | $19,084 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $673,538,692 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $823,524,086 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2018-12-31 | $5,114,371,457 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2018-12-31 | $8,876,399,964 |
| Total non interest bearing cash at end of year | 2018-12-31 | $1,561,008 |
| Value of net income/loss | 2018-12-31 | $256,603,824 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $24,534,265,778 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $22,754,815,242 |
| Investment advisory and management fees | 2018-12-31 | $765,300 |
| Income. Interest from US Government securities | 2018-12-31 | $566,795,826 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2018-12-31 | $4,209,682,660 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2018-12-31 | $8,126,399,158 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2018-12-31 | $8,126,399,158 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2018-12-31 | $126,353,193 |
| Asset value of US Government securities at end of year | 2018-12-31 | $24,763,854,875 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2018-12-31 | $22,681,291,962 |
| Aggregate proceeds on sale of assets | 2018-12-31 | $135,557,375,472 |
| Aggregate carrying amount (costs) on sale of assets | 2018-12-31 | $135,880,765,697 |
| 2017 : MORTGAGE-BACKED SECURITIES INDEX FUND 2017 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2017-12-31 | $12,002,721 |
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $12,002,721 |
| Total transfer of assets to this plan | 2017-12-31 | $5,137,231,810 |
| Total transfer of assets from this plan | 2017-12-31 | $1,595,197,395 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $8,876,399,964 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $6,312,444,474 |
| Expenses. Interest paid | 2017-12-31 | $106,634 |
| Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102 | 2017-12-31 | $106,634 |
| Total income from all sources (including contributions) | 2017-12-31 | $514,376,327 |
| Total loss/gain on sale of assets | 2017-12-31 | $35,474,623 |
| Total of all expenses incurred | 2017-12-31 | $788,086 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2017-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2017-12-31 | $0 |
| Value of total assets at end of year | 2017-12-31 | $31,631,215,206 |
| Value of total assets at beginning of year | 2017-12-31 | $25,011,637,060 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $681,452 |
| Total interest from all sources | 2017-12-31 | $466,898,983 |
| Total dividends received (eg from common stock, registered investment company shares) | 2017-12-31 | $0 |
| Administrative expenses professional fees incurred | 2017-12-31 | $19,139 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $823,524,086 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $743,555,647 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2017-12-31 | $8,876,399,964 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2017-12-31 | $6,312,444,474 |
| Value of net income/loss | 2017-12-31 | $513,588,241 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $22,754,815,242 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $18,699,192,586 |
| Investment advisory and management fees | 2017-12-31 | $662,313 |
| Income. Interest from corporate debt instruments | 2017-12-31 | $383,386,243 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2017-12-31 | $8,126,399,158 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2017-12-31 | $5,586,197,238 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2017-12-31 | $5,586,197,238 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2017-12-31 | $83,512,740 |
| Asset. Corporate debt instrument debt (other) at end of year | 2017-12-31 | $22,681,291,962 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2017-12-31 | $18,681,884,175 |
| Aggregate proceeds on sale of assets | 2017-12-31 | $140,284,417,116 |
| Aggregate carrying amount (costs) on sale of assets | 2017-12-31 | $140,248,942,493 |
| 2016 : MORTGAGE-BACKED SECURITIES INDEX FUND 2016 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2016-12-31 | $-145,741,067 |
| Total unrealized appreciation/depreciation of assets | 2016-12-31 | $-145,741,067 |
| Total transfer of assets to this plan | 2016-12-31 | $4,030,327,103 |
| Total transfer of assets from this plan | 2016-12-31 | $2,137,833,727 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $6,312,444,474 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $5,894,013,063 |
| Total income from all sources (including contributions) | 2016-12-31 | $244,247,468 |
| Total loss/gain on sale of assets | 2016-12-31 | $38,620,244 |
| Total of all expenses incurred | 2016-12-31 | $607,573 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2016-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2016-12-31 | $0 |
| Value of total assets at end of year | 2016-12-31 | $25,011,637,060 |
| Value of total assets at beginning of year | 2016-12-31 | $22,457,072,378 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2016-12-31 | $607,573 |
| Total interest from all sources | 2016-12-31 | $351,368,291 |
| Total dividends received (eg from common stock, registered investment company shares) | 2016-12-31 | $0 |
| Administrative expenses professional fees incurred | 2016-12-31 | $19,720 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2016-12-31 | $743,555,647 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2016-12-31 | $627,767,089 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2016-12-31 | $6,312,444,474 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2016-12-31 | $5,894,013,063 |
| Value of net income/loss | 2016-12-31 | $243,639,895 |
| Value of net assets at end of year (total assets less liabilities) | 2016-12-31 | $18,699,192,586 |
| Value of net assets at beginning of year (total assets less liabilities) | 2016-12-31 | $16,563,059,315 |
| Investment advisory and management fees | 2016-12-31 | $587,853 |
| Income. Interest from corporate debt instruments | 2016-12-31 | $316,674,337 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2016-12-31 | $5,586,197,238 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2016-12-31 | $5,353,862,510 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2016-12-31 | $5,353,862,510 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2016-12-31 | $34,693,954 |
| Asset. Corporate debt instrument debt (other) at end of year | 2016-12-31 | $18,681,884,175 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2016-12-31 | $16,475,442,779 |
| Aggregate proceeds on sale of assets | 2016-12-31 | $115,922,617,181 |
| Aggregate carrying amount (costs) on sale of assets | 2016-12-31 | $115,883,996,937 |
| 2015 : MORTGAGE-BACKED SECURITIES INDEX FUND 2015 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2015-12-31 | $-130,153,363 |
| Total unrealized appreciation/depreciation of assets | 2015-12-31 | $-130,153,363 |
| Total transfer of assets to this plan | 2015-12-31 | $2,983,359,045 |
| Total transfer of assets from this plan | 2015-12-31 | $2,094,486,407 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $5,894,013,063 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $7,697,343,938 |
| Total income from all sources (including contributions) | 2015-12-31 | $245,776,406 |
| Total loss/gain on sale of assets | 2015-12-31 | $121,846,749 |
| Total of all expenses incurred | 2015-12-31 | $567,161 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2015-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2015-12-31 | $0 |
| Value of total assets at end of year | 2015-12-31 | $22,457,072,378 |
| Value of total assets at beginning of year | 2015-12-31 | $23,126,321,370 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2015-12-31 | $567,161 |
| Total interest from all sources | 2015-12-31 | $254,083,020 |
| Total dividends received (eg from common stock, registered investment company shares) | 2015-12-31 | $0 |
| Administrative expenses professional fees incurred | 2015-12-31 | $19,720 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2015-12-31 | $627,767,089 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2015-12-31 | $104,062,448 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2015-12-31 | $5,894,013,063 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2015-12-31 | $7,697,343,938 |
| Value of net income/loss | 2015-12-31 | $245,209,245 |
| Value of net assets at end of year (total assets less liabilities) | 2015-12-31 | $16,563,059,315 |
| Value of net assets at beginning of year (total assets less liabilities) | 2015-12-31 | $15,428,977,432 |
| Investment advisory and management fees | 2015-12-31 | $547,441 |
| Income. Interest from corporate debt instruments | 2015-12-31 | $254,083,020 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2015-12-31 | $5,353,862,510 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2015-12-31 | $7,647,896,210 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2015-12-31 | $7,647,896,210 |
| Asset. Corporate debt instrument debt (other) at end of year | 2015-12-31 | $16,475,442,779 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2015-12-31 | $15,374,362,712 |
| Aggregate proceeds on sale of assets | 2015-12-31 | $144,453,257,926 |
| Aggregate carrying amount (costs) on sale of assets | 2015-12-31 | $144,331,411,177 |
| 2014 : MORTGAGE-BACKED SECURITIES INDEX FUND 2014 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2014-12-31 | $311,360,293 |
| Total unrealized appreciation/depreciation of assets | 2014-12-31 | $311,360,293 |
| Total transfer of assets to this plan | 2014-12-31 | $4,038,869,326 |
| Total transfer of assets from this plan | 2014-12-31 | $4,022,676,570 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $7,697,343,938 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $5,347,772,215 |
| Total income from all sources (including contributions) | 2014-12-31 | $947,565,661 |
| Total loss/gain on sale of assets | 2014-12-31 | $354,373,128 |
| Total of all expenses incurred | 2014-12-31 | $580,653 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2014-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2014-12-31 | $0 |
| Value of total assets at end of year | 2014-12-31 | $23,126,321,370 |
| Value of total assets at beginning of year | 2014-12-31 | $19,813,571,883 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2014-12-31 | $580,653 |
| Total interest from all sources | 2014-12-31 | $281,832,240 |
| Total dividends received (eg from common stock, registered investment company shares) | 2014-12-31 | $0 |
| Administrative expenses professional fees incurred | 2014-12-31 | $19,440 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2014-12-31 | $104,062,448 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2014-12-31 | $363,386,782 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2014-12-31 | $7,697,343,938 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2014-12-31 | $5,347,772,215 |
| Value of net income/loss | 2014-12-31 | $946,985,008 |
| Value of net assets at end of year (total assets less liabilities) | 2014-12-31 | $15,428,977,432 |
| Value of net assets at beginning of year (total assets less liabilities) | 2014-12-31 | $14,465,799,668 |
| Investment advisory and management fees | 2014-12-31 | $561,213 |
| Income. Interest from corporate debt instruments | 2014-12-31 | $281,832,240 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2014-12-31 | $7,647,896,210 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2014-12-31 | $5,053,761,810 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2014-12-31 | $5,053,761,810 |
| Asset. Corporate debt instrument debt (other) at end of year | 2014-12-31 | $15,374,362,712 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2014-12-31 | $14,396,423,291 |
| Aggregate proceeds on sale of assets | 2014-12-31 | $133,139,156,357 |
| Aggregate carrying amount (costs) on sale of assets | 2014-12-31 | $132,784,783,229 |
| 2013 : MORTGAGE-BACKED SECURITIES INDEX FUND 2013 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2013-12-31 | $-519,295,227 |
| Total unrealized appreciation/depreciation of assets | 2013-12-31 | $-519,295,227 |
| Total transfer of assets to this plan | 2013-12-31 | $3,633,526,117 |
| Total transfer of assets from this plan | 2013-12-31 | $10,678,769,423 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $5,347,772,215 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $5,781,932,723 |
| Total income from all sources (including contributions) | 2013-12-31 | $-186,485,499 |
| Total loss/gain on sale of assets | 2013-12-31 | $59,717,831 |
| Total of all expenses incurred | 2013-12-31 | $556,025 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2013-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2013-12-31 | $0 |
| Value of total assets at end of year | 2013-12-31 | $19,813,571,883 |
| Value of total assets at beginning of year | 2013-12-31 | $27,480,017,221 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2013-12-31 | $556,025 |
| Total interest from all sources | 2013-12-31 | $273,091,897 |
| Total dividends received (eg from common stock, registered investment company shares) | 2013-12-31 | $0 |
| Administrative expenses professional fees incurred | 2013-12-31 | $20,500 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2013-12-31 | $363,386,782 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2013-12-31 | $1,872,547,121 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2013-12-31 | $5,347,772,215 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2013-12-31 | $5,781,932,723 |
| Administrative expenses (other) incurred | 2013-12-31 | $-7,895 |
| Value of net income/loss | 2013-12-31 | $-187,041,524 |
| Value of net assets at end of year (total assets less liabilities) | 2013-12-31 | $14,465,799,668 |
| Value of net assets at beginning of year (total assets less liabilities) | 2013-12-31 | $21,698,084,498 |
| Investment advisory and management fees | 2013-12-31 | $543,420 |
| Income. Interest from corporate debt instruments | 2013-12-31 | $273,091,897 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2013-12-31 | $5,053,761,810 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2013-12-31 | $4,020,358,026 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2013-12-31 | $4,020,358,026 |
| Asset. Corporate debt instrument debt (other) at end of year | 2013-12-31 | $14,396,423,291 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2013-12-31 | $21,587,112,074 |
| Aggregate proceeds on sale of assets | 2013-12-31 | $101,267,665,766 |
| Aggregate carrying amount (costs) on sale of assets | 2013-12-31 | $101,207,947,935 |
| 2012 : MORTGAGE-BACKED SECURITIES INDEX FUND 2012 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2012-12-31 | $-117,776,014 |
| Total unrealized appreciation/depreciation of assets | 2012-12-31 | $-117,776,014 |
| Total transfer of assets to this plan | 2012-12-31 | $5,050,965,722 |
| Total transfer of assets from this plan | 2012-12-31 | $2,882,583,110 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $5,781,932,723 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $2,470,541,039 |
| Total income from all sources (including contributions) | 2012-12-31 | $531,726,170 |
| Total loss/gain on sale of assets | 2012-12-31 | $141,335,217 |
| Total of all expenses incurred | 2012-12-31 | $739,138 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2012-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2012-12-31 | $0 |
| Value of total assets at end of year | 2012-12-31 | $27,480,017,221 |
| Value of total assets at beginning of year | 2012-12-31 | $21,469,255,893 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2012-12-31 | $739,138 |
| Total interest from all sources | 2012-12-31 | $508,166,967 |
| Total dividends received (eg from common stock, registered investment company shares) | 2012-12-31 | $0 |
| Administrative expenses professional fees incurred | 2012-12-31 | $19,000 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2012-12-31 | $1,872,547,121 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2012-12-31 | $365,732,899 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2012-12-31 | $5,781,932,723 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2012-12-31 | $2,470,541,039 |
| Value of net income/loss | 2012-12-31 | $530,987,032 |
| Value of net assets at end of year (total assets less liabilities) | 2012-12-31 | $21,698,084,498 |
| Value of net assets at beginning of year (total assets less liabilities) | 2012-12-31 | $18,998,714,854 |
| Investment advisory and management fees | 2012-12-31 | $720,138 |
| Income. Interest from corporate debt instruments | 2012-12-31 | $508,166,967 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2012-12-31 | $4,020,358,026 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2012-12-31 | $2,207,980,908 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2012-12-31 | $2,207,980,908 |
| Asset. Corporate debt instrument debt (other) at end of year | 2012-12-31 | $21,587,112,074 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2012-12-31 | $18,895,542,086 |
| Aggregate proceeds on sale of assets | 2012-12-31 | $81,559,736,112 |
| Aggregate carrying amount (costs) on sale of assets | 2012-12-31 | $81,418,400,895 |
| 2011 : MORTGAGE-BACKED SECURITIES INDEX FUND 2011 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2011-12-31 | $271,762,632 |
| Total unrealized appreciation/depreciation of assets | 2011-12-31 | $271,762,632 |
| Total transfer of assets to this plan | 2011-12-31 | $19,038,636,321 |
| Total transfer of assets from this plan | 2011-12-31 | $16,882,339,289 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $2,470,541,039 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $1,611,248,102 |
| Total income from all sources (including contributions) | 2011-12-31 | $1,054,813,812 |
| Total loss/gain on sale of assets | 2011-12-31 | $194,261,947 |
| Total of all expenses incurred | 2011-12-31 | $718,322 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2011-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2011-12-31 | $0 |
| Value of total assets at end of year | 2011-12-31 | $21,469,255,893 |
| Value of total assets at beginning of year | 2011-12-31 | $17,399,570,434 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2011-12-31 | $718,322 |
| Total interest from all sources | 2011-12-31 | $588,789,233 |
| Total dividends received (eg from common stock, registered investment company shares) | 2011-12-31 | $0 |
| Administrative expenses professional fees incurred | 2011-12-31 | $21,975 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2011-12-31 | $365,732,899 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2011-12-31 | $758,402,972 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2011-12-31 | $2,470,541,039 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2011-12-31 | $1,611,248,102 |
| Value of net income/loss | 2011-12-31 | $1,054,095,490 |
| Value of net assets at end of year (total assets less liabilities) | 2011-12-31 | $18,998,714,854 |
| Value of net assets at beginning of year (total assets less liabilities) | 2011-12-31 | $15,788,322,332 |
| Investment advisory and management fees | 2011-12-31 | $696,347 |
| Income. Interest from corporate debt instruments | 2011-12-31 | $588,789,233 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2011-12-31 | $2,207,980,908 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2011-12-31 | $738,570,153 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2011-12-31 | $738,570,153 |
| Asset. Corporate debt instrument debt (other) at end of year | 2011-12-31 | $18,895,542,086 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2011-12-31 | $15,902,597,309 |
| Aggregate proceeds on sale of assets | 2011-12-31 | $51,292,284,281 |
| Aggregate carrying amount (costs) on sale of assets | 2011-12-31 | $51,098,022,334 |
| 2010 : MORTGAGE-BACKED SECURITIES INDEX FUND 2010 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2010-12-31 | $35,311,490 |
| Total unrealized appreciation/depreciation of assets | 2010-12-31 | $35,311,490 |
| Total transfer of assets to this plan | 2010-12-31 | $4,867,277,804 |
| Total transfer of assets from this plan | 2010-12-31 | $4,109,836,755 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $1,611,248,102 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $2,786,385,599 |
| Total income from all sources (including contributions) | 2010-12-31 | $809,612,796 |
| Total loss/gain on sale of assets | 2010-12-31 | $218,996,546 |
| Total of all expenses incurred | 2010-12-31 | $583,747 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2010-12-31 | $0 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2010-12-31 | $0 |
| Value of total assets at end of year | 2010-12-31 | $17,399,570,434 |
| Value of total assets at beginning of year | 2010-12-31 | $17,008,237,833 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2010-12-31 | $583,747 |
| Total interest from all sources | 2010-12-31 | $555,304,760 |
| Total dividends received (eg from common stock, registered investment company shares) | 2010-12-31 | $0 |
| Administrative expenses professional fees incurred | 2010-12-31 | $21,975 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2010-12-31 | $758,402,972 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2010-12-31 | $122,522,768 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2010-12-31 | $1,611,248,102 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2010-12-31 | $2,786,385,599 |
| Value of net income/loss | 2010-12-31 | $809,029,049 |
| Value of net assets at end of year (total assets less liabilities) | 2010-12-31 | $15,788,322,332 |
| Value of net assets at beginning of year (total assets less liabilities) | 2010-12-31 | $14,221,852,234 |
| Investment advisory and management fees | 2010-12-31 | $561,772 |
| Income. Interest from corporate debt instruments | 2010-12-31 | $549,716,283 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2010-12-31 | $738,570,153 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2010-12-31 | $2,988,677,773 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2010-12-31 | $2,988,677,773 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2010-12-31 | $5,588,477 |
| Asset. Corporate debt instrument debt (other) at end of year | 2010-12-31 | $15,902,597,309 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2010-12-31 | $13,897,037,292 |
| Aggregate proceeds on sale of assets | 2010-12-31 | $49,534,683,243 |
| Aggregate carrying amount (costs) on sale of assets | 2010-12-31 | $49,315,686,697 |
