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 B
| Measure | Date | Value |
|---|
| 2023 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2023 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-12-31 | $53,707,935 |
| Total unrealized appreciation/depreciation of assets | 2023-12-31 | $53,707,935 |
| Total transfer of assets to this plan | 2023-12-31 | $96,479,570 |
| Total transfer of assets from this plan | 2023-12-31 | $425,593,104 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $110,355,446 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $108,807,839 |
| Expenses. Interest paid | 2023-12-31 | $4,894 |
| 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 | $4,894 |
| Total income from all sources (including contributions) | 2023-12-31 | $43,159,842 |
| Total loss/gain on sale of assets | 2023-12-31 | $-46,661,733 |
| Total of all expenses incurred | 2023-12-31 | $116,942 |
| Value of total assets at end of year | 2023-12-31 | $942,482,389 |
| Value of total assets at beginning of year | 2023-12-31 | $1,227,005,416 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-12-31 | $112,048 |
| Total interest from all sources | 2023-12-31 | $36,113,640 |
| 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 | $33,374,696 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-12-31 | $21,443,947 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-12-31 | $110,355,446 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-12-31 | $108,807,839 |
| Administrative expenses (other) incurred | 2023-12-31 | $3,300 |
| Total non interest bearing cash at end of year | 2023-12-31 | $37,000 |
| Total non interest bearing cash at beginning of year | 2023-12-31 | $950 |
| Value of net income/loss | 2023-12-31 | $43,042,900 |
| Value of net assets at end of year (total assets less liabilities) | 2023-12-31 | $832,126,943 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-12-31 | $1,118,197,577 |
| Investment advisory and management fees | 2023-12-31 | $89,136 |
| Income. Interest from US Government securities | 2023-12-31 | $31,499,388 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-12-31 | $50,856,260 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2023-12-31 | $77,353,048 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2023-12-31 | $77,353,048 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-12-31 | $4,614,252 |
| Asset value of US Government securities at end of year | 2023-12-31 | $858,214,433 |
| Asset value of US Government securities at beginning of year | 2023-12-31 | $1,128,207,471 |
| Aggregate proceeds on sale of assets | 2023-12-31 | $2,950,180,963 |
| Aggregate carrying amount (costs) on sale of assets | 2023-12-31 | $2,996,842,696 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2023-01-01 | $53,707,935 |
| Total unrealized appreciation/depreciation of assets | 2023-01-01 | $53,707,935 |
| Total transfer of assets to this plan | 2023-01-01 | $96,479,570 |
| Total transfer of assets from this plan | 2023-01-01 | $425,593,104 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $110,355,446 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $108,807,839 |
| Total income from all sources (including contributions) | 2023-01-01 | $43,159,842 |
| Total loss/gain on sale of assets | 2023-01-01 | $-46,661,733 |
| Total of all expenses incurred | 2023-01-01 | $116,942 |
| Value of total assets at end of year | 2023-01-01 | $942,482,389 |
| Value of total assets at beginning of year | 2023-01-01 | $1,227,005,416 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-01-01 | $112,048 |
| Total interest from all sources | 2023-01-01 | $36,113,640 |
| 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 | $33,374,696 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2023-01-01 | $21,443,947 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2023-01-01 | $110,355,446 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2023-01-01 | $108,807,839 |
| Administrative expenses (other) incurred | 2023-01-01 | $3,300 |
| Total non interest bearing cash at end of year | 2023-01-01 | $37,000 |
| Total non interest bearing cash at beginning of year | 2023-01-01 | $950 |
| Value of net income/loss | 2023-01-01 | $43,042,900 |
| Value of net assets at end of year (total assets less liabilities) | 2023-01-01 | $832,126,943 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-01-01 | $1,118,197,577 |
| Investment advisory and management fees | 2023-01-01 | $89,136 |
| Income. Interest from US Government securities | 2023-01-01 | $31,499,388 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2023-01-01 | $50,856,260 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2023-01-01 | $4,614,252 |
| Asset value of US Government securities at end of year | 2023-01-01 | $858,214,433 |
| Asset value of US Government securities at beginning of year | 2023-01-01 | $1,128,207,471 |
| Aggregate proceeds on sale of assets | 2023-01-01 | $2,950,180,963 |
| Aggregate carrying amount (costs) on sale of assets | 2023-01-01 | $2,996,842,696 |
| 2022 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2022 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-12-31 | $-155,003,479 |
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $-155,003,479 |
| Total transfer of assets to this plan | 2022-12-31 | $238,295,000 |
| Total transfer of assets from this plan | 2022-12-31 | $326,345,287 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $108,807,839 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $450,342,063 |
| Expenses. Interest paid | 2022-12-31 | $2,619 |
| 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 | $2,619 |
| Total income from all sources (including contributions) | 2022-12-31 | $-160,805,925 |
| Total loss/gain on sale of assets | 2022-12-31 | $-33,564,442 |
| Total of all expenses incurred | 2022-12-31 | $116,728 |
| Value of total assets at end of year | 2022-12-31 | $1,227,005,416 |
| Value of total assets at beginning of year | 2022-12-31 | $1,817,512,580 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $114,109 |
| Total interest from all sources | 2022-12-31 | $27,761,996 |
| 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 | $19,258 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-12-31 | $21,443,947 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-12-31 | $28,872,498 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-12-31 | $108,807,839 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-12-31 | $450,342,063 |
| Administrative expenses (other) incurred | 2022-12-31 | $3,300 |
| Total non interest bearing cash at end of year | 2022-12-31 | $950 |
| Value of net income/loss | 2022-12-31 | $-160,922,653 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $1,118,197,577 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $1,367,170,517 |
| Investment advisory and management fees | 2022-12-31 | $91,551 |
| Income. Interest from US Government securities | 2022-12-31 | $25,604,834 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-12-31 | $77,353,048 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2022-12-31 | $421,952,170 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2022-12-31 | $421,952,170 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-12-31 | $2,157,162 |
| Asset value of US Government securities at end of year | 2022-12-31 | $1,128,207,471 |
| Asset value of US Government securities at beginning of year | 2022-12-31 | $1,366,687,912 |
| Aggregate proceeds on sale of assets | 2022-12-31 | $4,913,147,391 |
| Aggregate carrying amount (costs) on sale of assets | 2022-12-31 | $4,946,711,833 |
| Unrealized appreciation/depreciation of other (non real estate) assets | 2022-01-01 | $-155,003,479 |
| Total unrealized appreciation/depreciation of assets | 2022-01-01 | $-155,003,479 |
| Total transfer of assets to this plan | 2022-01-01 | $238,295,000 |
| Total transfer of assets from this plan | 2022-01-01 | $326,345,287 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $108,807,839 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $450,342,063 |
| Total income from all sources (including contributions) | 2022-01-01 | $-160,805,925 |
| Total loss/gain on sale of assets | 2022-01-01 | $-33,564,442 |
| Total of all expenses incurred | 2022-01-01 | $116,728 |
| Value of total assets at end of year | 2022-01-01 | $1,227,005,416 |
| Value of total assets at beginning of year | 2022-01-01 | $1,817,512,580 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-01-01 | $114,109 |
| Total interest from all sources | 2022-01-01 | $27,761,996 |
| 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 | $19,258 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2022-01-01 | $21,443,947 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2022-01-01 | $28,872,498 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2022-01-01 | $108,807,839 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2022-01-01 | $450,342,063 |
| Administrative expenses (other) incurred | 2022-01-01 | $3,300 |
| Total non interest bearing cash at end of year | 2022-01-01 | $950 |
| Value of net income/loss | 2022-01-01 | $-160,922,653 |
| Value of net assets at end of year (total assets less liabilities) | 2022-01-01 | $1,118,197,577 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-01-01 | $1,367,170,517 |
| Investment advisory and management fees | 2022-01-01 | $91,551 |
| Income. Interest from US Government securities | 2022-01-01 | $25,604,834 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2022-01-01 | $77,353,048 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2022-01-01 | $2,157,162 |
| Asset value of US Government securities at end of year | 2022-01-01 | $1,128,207,471 |
| Asset value of US Government securities at beginning of year | 2022-01-01 | $1,366,687,912 |
| Aggregate proceeds on sale of assets | 2022-01-01 | $4,913,147,391 |
| Aggregate carrying amount (costs) on sale of assets | 2022-01-01 | $4,946,711,833 |
| 2021 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2021 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2021-12-31 | $-27,998,567 |
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $-27,998,567 |
| Total transfer of assets to this plan | 2021-12-31 | $488,954,491 |
| Total transfer of assets from this plan | 2021-12-31 | $354,213,972 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $450,342,063 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $455,405,230 |
| Total income from all sources (including contributions) | 2021-12-31 | $-14,722,593 |
| Total loss/gain on sale of assets | 2021-12-31 | $-2,965,109 |
| Total of all expenses incurred | 2021-12-31 | $101,364 |
| Value of total assets at end of year | 2021-12-31 | $1,817,512,580 |
| Value of total assets at beginning of year | 2021-12-31 | $1,702,659,185 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $101,364 |
| Total interest from all sources | 2021-12-31 | $16,241,083 |
| 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 | $17,176 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $28,872,498 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $116,209,783 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2021-12-31 | $450,342,063 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2021-12-31 | $455,405,230 |
| Administrative expenses (other) incurred | 2021-12-31 | $3,300 |
| Value of net income/loss | 2021-12-31 | $-14,823,957 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $1,367,170,517 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $1,247,253,955 |
| Investment advisory and management fees | 2021-12-31 | $80,888 |
| Income. Interest from US Government securities | 2021-12-31 | $15,545,721 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2021-12-31 | $421,952,170 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2021-12-31 | $289,720,305 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2021-12-31 | $289,720,305 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2021-12-31 | $695,362 |
| Asset value of US Government securities at end of year | 2021-12-31 | $1,366,687,912 |
| Asset value of US Government securities at beginning of year | 2021-12-31 | $1,296,729,097 |
| Aggregate proceeds on sale of assets | 2021-12-31 | $7,351,196,606 |
| Aggregate carrying amount (costs) on sale of assets | 2021-12-31 | $7,354,161,715 |
| 2020 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2020 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2020-12-31 | $15,768,219 |
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $15,768,219 |
| Total transfer of assets to this plan | 2020-12-31 | $289,459,140 |
| Total transfer of assets from this plan | 2020-12-31 | $286,384,318 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $455,405,230 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $247,735,957 |
| Expenses. Interest paid | 2020-12-31 | $381 |
| 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 | $381 |
| Total income from all sources (including contributions) | 2020-12-31 | $46,485,944 |
| Total loss/gain on sale of assets | 2020-12-31 | $8,158,346 |
| Total of all expenses incurred | 2020-12-31 | $100,613 |
| Value of total assets at end of year | 2020-12-31 | $1,702,659,185 |
| Value of total assets at beginning of year | 2020-12-31 | $1,445,529,759 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $100,232 |
| Total interest from all sources | 2020-12-31 | $22,559,379 |
| 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 | $17,390 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $116,209,783 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $86,950,231 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2020-12-31 | $455,405,230 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2020-12-31 | $247,735,957 |
| Administrative expenses (other) incurred | 2020-12-31 | $3,300 |
| Total non interest bearing cash at beginning of year | 2020-12-31 | $4,642 |
| Value of net income/loss | 2020-12-31 | $46,385,331 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $1,247,253,955 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $1,197,793,802 |
| Investment advisory and management fees | 2020-12-31 | $79,542 |
| Income. Interest from US Government securities | 2020-12-31 | $21,290,748 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2020-12-31 | $289,720,305 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2020-12-31 | $121,799,360 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2020-12-31 | $121,799,360 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2020-12-31 | $1,268,631 |
| Asset value of US Government securities at end of year | 2020-12-31 | $1,296,729,097 |
| Asset value of US Government securities at beginning of year | 2020-12-31 | $1,236,775,526 |
| Aggregate proceeds on sale of assets | 2020-12-31 | $5,948,956,416 |
| Aggregate carrying amount (costs) on sale of assets | 2020-12-31 | $5,940,798,070 |
| 2019 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2019 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $27,538,592 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $27,538,592 |
| Total transfer of assets to this plan | 2019-12-31 | $407,751,147 |
| Total transfer of assets from this plan | 2019-12-31 | $209,638,588 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $247,735,957 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $200,699,964 |
| Total income from all sources (including contributions) | 2019-12-31 | $68,929,864 |
| Total loss/gain on sale of assets | 2019-12-31 | $8,500,679 |
| Total of all expenses incurred | 2019-12-31 | $86,323 |
| Value of total assets at end of year | 2019-12-31 | $1,445,529,759 |
| Value of total assets at beginning of year | 2019-12-31 | $1,131,537,666 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $86,323 |
| Total interest from all sources | 2019-12-31 | $32,890,593 |
| 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 | $20,728 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $86,950,231 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $16,856,696 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2019-12-31 | $247,735,957 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2019-12-31 | $200,699,964 |
| Total non interest bearing cash at end of year | 2019-12-31 | $4,642 |
| Value of net income/loss | 2019-12-31 | $68,843,541 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $1,197,793,802 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $930,837,702 |
| Investment advisory and management fees | 2019-12-31 | $65,595 |
| Income. Interest from US Government securities | 2019-12-31 | $26,259,977 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $121,799,360 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $172,820,268 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $172,820,268 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $6,630,616 |
| Asset value of US Government securities at end of year | 2019-12-31 | $1,236,775,526 |
| Asset value of US Government securities at beginning of year | 2019-12-31 | $941,860,702 |
| Aggregate proceeds on sale of assets | 2019-12-31 | $6,864,781,753 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $6,856,281,074 |
| 2018 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2018 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2018-12-31 | $-5,628,696 |
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $-5,628,696 |
| Total transfer of assets to this plan | 2018-12-31 | $175,702,521 |
| Total transfer of assets from this plan | 2018-12-31 | $106,145,240 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $200,699,964 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $275,136,281 |
| Expenses. Interest paid | 2018-12-31 | $2,574 |
| 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 | $2,574 |
| Total income from all sources (including contributions) | 2018-12-31 | $10,405,892 |
| Total loss/gain on sale of assets | 2018-12-31 | $-8,964,366 |
| Total of all expenses incurred | 2018-12-31 | $105,962 |
| Value of total assets at end of year | 2018-12-31 | $1,131,537,666 |
| Value of total assets at beginning of year | 2018-12-31 | $1,126,116,772 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $103,388 |
| Total interest from all sources | 2018-12-31 | $24,998,954 |
| 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 | $20,937 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $16,856,696 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $23,060,116 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2018-12-31 | $200,699,964 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2018-12-31 | $275,136,281 |
| Value of net income/loss | 2018-12-31 | $10,299,930 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $930,837,702 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $850,980,491 |
| Investment advisory and management fees | 2018-12-31 | $82,451 |
| Income. Interest from US Government securities | 2018-12-31 | $20,998,771 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2018-12-31 | $172,820,268 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2018-12-31 | $247,867,117 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2018-12-31 | $247,867,117 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2018-12-31 | $4,000,183 |
| Asset value of US Government securities at end of year | 2018-12-31 | $941,860,702 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2018-12-31 | $855,189,539 |
| Aggregate proceeds on sale of assets | 2018-12-31 | $4,522,344,524 |
| Aggregate carrying amount (costs) on sale of assets | 2018-12-31 | $4,531,308,890 |
| 2017 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2017 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2017-12-31 | $-202,359 |
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $-202,359 |
| Total transfer of assets to this plan | 2017-12-31 | $126,533,332 |
| Total transfer of assets from this plan | 2017-12-31 | $154,394,005 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $275,136,281 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $304,856,178 |
| Expenses. Interest paid | 2017-12-31 | $1,973 |
| 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 | $1,973 |
| Total income from all sources (including contributions) | 2017-12-31 | $21,439,215 |
| Total loss/gain on sale of assets | 2017-12-31 | $1,624,879 |
| Total of all expenses incurred | 2017-12-31 | $110,832 |
| 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 | $1,126,116,772 |
| Value of total assets at beginning of year | 2017-12-31 | $1,162,368,959 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $108,859 |
| Total interest from all sources | 2017-12-31 | $20,016,695 |
| Total dividends received (eg from common stock, registered investment company shares) | 2017-12-31 | $0 |
| Administrative expenses professional fees incurred | 2017-12-31 | $20,967 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $23,060,116 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $38,598,209 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2017-12-31 | $275,136,281 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2017-12-31 | $304,856,178 |
| Value of net income/loss | 2017-12-31 | $21,328,383 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $850,980,491 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $857,512,781 |
| Investment advisory and management fees | 2017-12-31 | $87,892 |
| Income. Interest from corporate debt instruments | 2017-12-31 | $17,149,695 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2017-12-31 | $247,867,117 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2017-12-31 | $260,426,530 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2017-12-31 | $260,426,530 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2017-12-31 | $2,867,000 |
| Asset. Corporate debt instrument debt (other) at end of year | 2017-12-31 | $855,189,539 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2017-12-31 | $863,344,220 |
| Aggregate proceeds on sale of assets | 2017-12-31 | $5,417,598,374 |
| Aggregate carrying amount (costs) on sale of assets | 2017-12-31 | $5,415,973,495 |
| 2016 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2016 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2016-12-31 | $-6,771,866 |
| Total unrealized appreciation/depreciation of assets | 2016-12-31 | $-6,771,866 |
| Total transfer of assets to this plan | 2016-12-31 | $258,641,304 |
| Total transfer of assets from this plan | 2016-12-31 | $92,622,604 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $304,856,178 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2016-12-31 | $188,741,466 |
| Total income from all sources (including contributions) | 2016-12-31 | $9,648,978 |
| Total loss/gain on sale of assets | 2016-12-31 | $164,916 |
| Total of all expenses incurred | 2016-12-31 | $107,124 |
| 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 | $1,162,368,959 |
| Value of total assets at beginning of year | 2016-12-31 | $870,693,693 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2016-12-31 | $107,124 |
| Total interest from all sources | 2016-12-31 | $16,255,928 |
| Total dividends received (eg from common stock, registered investment company shares) | 2016-12-31 | $0 |
| Administrative expenses professional fees incurred | 2016-12-31 | $21,510 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2016-12-31 | $38,598,209 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2016-12-31 | $38,557,298 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2016-12-31 | $304,856,178 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2016-12-31 | $188,741,466 |
| Administrative expenses (other) incurred | 2016-12-31 | $-75 |
| Value of net income/loss | 2016-12-31 | $9,541,854 |
| Value of net assets at end of year (total assets less liabilities) | 2016-12-31 | $857,512,781 |
| Value of net assets at beginning of year (total assets less liabilities) | 2016-12-31 | $681,952,227 |
| Investment advisory and management fees | 2016-12-31 | $85,689 |
| Income. Interest from corporate debt instruments | 2016-12-31 | $14,867,309 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2016-12-31 | $260,426,530 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2016-12-31 | $141,052,549 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2016-12-31 | $141,052,549 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2016-12-31 | $1,388,619 |
| Asset. Corporate debt instrument debt (other) at end of year | 2016-12-31 | $863,344,220 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2016-12-31 | $691,083,846 |
| Aggregate proceeds on sale of assets | 2016-12-31 | $5,216,068,596 |
| Aggregate carrying amount (costs) on sale of assets | 2016-12-31 | $5,215,903,680 |
| 2015 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2015 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2015-12-31 | $-7,468,256 |
| Total unrealized appreciation/depreciation of assets | 2015-12-31 | $-7,468,256 |
| Total transfer of assets to this plan | 2015-12-31 | $93,828,875 |
| Total transfer of assets from this plan | 2015-12-31 | $244,255,762 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $188,741,466 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2015-12-31 | $527,943,155 |
| Total income from all sources (including contributions) | 2015-12-31 | $13,050,228 |
| Total loss/gain on sale of assets | 2015-12-31 | $6,060,869 |
| Total of all expenses incurred | 2015-12-31 | $105,985 |
| 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 | $870,693,693 |
| Value of total assets at beginning of year | 2015-12-31 | $1,347,378,026 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2015-12-31 | $105,985 |
| Total interest from all sources | 2015-12-31 | $14,457,615 |
| Total dividends received (eg from common stock, registered investment company shares) | 2015-12-31 | $0 |
| Administrative expenses professional fees incurred | 2015-12-31 | $21,510 |
| Assets. Other investments not covered elsewhere at end of year | 2015-12-31 | $11,351,188 |
| Assets. Other investments not covered elsewhere at beginning of year | 2015-12-31 | $6,860,217 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2015-12-31 | $27,206,110 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2015-12-31 | $140,065,653 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2015-12-31 | $188,741,466 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2015-12-31 | $527,943,155 |
| Value of net income/loss | 2015-12-31 | $12,944,243 |
| Value of net assets at end of year (total assets less liabilities) | 2015-12-31 | $681,952,227 |
| Value of net assets at beginning of year (total assets less liabilities) | 2015-12-31 | $819,434,871 |
| Investment advisory and management fees | 2015-12-31 | $84,475 |
| Income. Interest from corporate debt instruments | 2015-12-31 | $14,457,615 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2015-12-31 | $141,052,549 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2015-12-31 | $375,897,830 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2015-12-31 | $375,897,830 |
| Asset. Corporate debt instrument debt (other) at end of year | 2015-12-31 | $691,083,846 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2015-12-31 | $824,554,326 |
| Aggregate proceeds on sale of assets | 2015-12-31 | $7,329,649,810 |
| Aggregate carrying amount (costs) on sale of assets | 2015-12-31 | $7,323,588,941 |
| 2014 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2014 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2014-12-31 | $17,776,487 |
| Total unrealized appreciation/depreciation of assets | 2014-12-31 | $17,776,487 |
| Total transfer of assets to this plan | 2014-12-31 | $276,318,629 |
| Total transfer of assets from this plan | 2014-12-31 | $400,446,084 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $527,943,155 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2014-12-31 | $304,245,983 |
| Total income from all sources (including contributions) | 2014-12-31 | $57,230,882 |
| Total loss/gain on sale of assets | 2014-12-31 | $23,105,593 |
| Total of all expenses incurred | 2014-12-31 | $109,430 |
| 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 | $1,347,378,026 |
| Value of total assets at beginning of year | 2014-12-31 | $1,190,686,857 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2014-12-31 | $109,430 |
| Total interest from all sources | 2014-12-31 | $16,348,802 |
| Total dividends received (eg from common stock, registered investment company shares) | 2014-12-31 | $0 |
| Administrative expenses professional fees incurred | 2014-12-31 | $21,230 |
| Assets. Other investments not covered elsewhere at end of year | 2014-12-31 | $6,860,217 |
| Assets. Other investments not covered elsewhere at beginning of year | 2014-12-31 | $5,452,946 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2014-12-31 | $140,065,653 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2014-12-31 | $17,320,472 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2014-12-31 | $527,943,155 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2014-12-31 | $304,245,983 |
| Value of net income/loss | 2014-12-31 | $57,121,452 |
| Value of net assets at end of year (total assets less liabilities) | 2014-12-31 | $819,434,871 |
| Value of net assets at beginning of year (total assets less liabilities) | 2014-12-31 | $886,440,874 |
| Investment advisory and management fees | 2014-12-31 | $88,200 |
| Income. Interest from corporate debt instruments | 2014-12-31 | $16,348,802 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2014-12-31 | $375,897,830 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2014-12-31 | $278,186,928 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2014-12-31 | $278,186,928 |
| Asset. Corporate debt instrument debt (other) at end of year | 2014-12-31 | $824,554,326 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2014-12-31 | $889,726,511 |
| Aggregate proceeds on sale of assets | 2014-12-31 | $8,250,621,034 |
| Aggregate carrying amount (costs) on sale of assets | 2014-12-31 | $8,227,515,441 |
| 2013 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2013 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2013-12-31 | $-25,679,434 |
| Total unrealized appreciation/depreciation of assets | 2013-12-31 | $-25,679,434 |
| Total transfer of assets to this plan | 2013-12-31 | $459,174,875 |
| Total transfer of assets from this plan | 2013-12-31 | $238,168,241 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $304,245,983 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2013-12-31 | $232,281,674 |
| Total income from all sources (including contributions) | 2013-12-31 | $-13,156,157 |
| Total loss/gain on sale of assets | 2013-12-31 | $-5,228,108 |
| Total of all expenses incurred | 2013-12-31 | $111,375 |
| 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 | $1,190,686,857 |
| Value of total assets at beginning of year | 2013-12-31 | $910,983,446 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2013-12-31 | $111,375 |
| Total interest from all sources | 2013-12-31 | $17,751,385 |
| Total dividends received (eg from common stock, registered investment company shares) | 2013-12-31 | $0 |
| Administrative expenses professional fees incurred | 2013-12-31 | $22,300 |
| Assets. Other investments not covered elsewhere at end of year | 2013-12-31 | $5,452,946 |
| Assets. Other investments not covered elsewhere at beginning of year | 2013-12-31 | $44,866,124 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2013-12-31 | $17,320,472 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2013-12-31 | $74,892,903 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2013-12-31 | $304,245,983 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2013-12-31 | $232,281,674 |
| Value of net income/loss | 2013-12-31 | $-13,267,532 |
| Value of net assets at end of year (total assets less liabilities) | 2013-12-31 | $886,440,874 |
| Value of net assets at beginning of year (total assets less liabilities) | 2013-12-31 | $678,701,772 |
| Investment advisory and management fees | 2013-12-31 | $89,075 |
| Income. Interest from corporate debt instruments | 2013-12-31 | $17,751,385 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2013-12-31 | $278,186,928 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2013-12-31 | $70,760,909 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2013-12-31 | $70,760,909 |
| Asset. Corporate debt instrument debt (other) at end of year | 2013-12-31 | $889,726,511 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2013-12-31 | $720,463,510 |
| Aggregate proceeds on sale of assets | 2013-12-31 | $5,239,038,044 |
| Aggregate carrying amount (costs) on sale of assets | 2013-12-31 | $5,244,266,152 |
| 2012 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2012 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2012-12-31 | $-8,889,219 |
| Total unrealized appreciation/depreciation of assets | 2012-12-31 | $-8,889,219 |
| Total transfer of assets to this plan | 2012-12-31 | $139,651,176 |
| Total transfer of assets from this plan | 2012-12-31 | $193,320,596 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $232,281,674 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2012-12-31 | $114,662,560 |
| Total income from all sources (including contributions) | 2012-12-31 | $17,518,490 |
| Total loss/gain on sale of assets | 2012-12-31 | $6,478,349 |
| Total of all expenses incurred | 2012-12-31 | $112,054 |
| 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 | $910,983,446 |
| Value of total assets at beginning of year | 2012-12-31 | $829,627,316 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2012-12-31 | $112,054 |
| Total interest from all sources | 2012-12-31 | $19,929,360 |
| Total dividends received (eg from common stock, registered investment company shares) | 2012-12-31 | $0 |
| Administrative expenses professional fees incurred | 2012-12-31 | $20,800 |
| Assets. Other investments not covered elsewhere at end of year | 2012-12-31 | $44,866,124 |
| Assets. Other investments not covered elsewhere at beginning of year | 2012-12-31 | $0 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2012-12-31 | $74,892,903 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2012-12-31 | $44,724,765 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2012-12-31 | $232,281,674 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2012-12-31 | $114,662,560 |
| Value of net income/loss | 2012-12-31 | $17,406,436 |
| Value of net assets at end of year (total assets less liabilities) | 2012-12-31 | $678,701,772 |
| Value of net assets at beginning of year (total assets less liabilities) | 2012-12-31 | $714,964,756 |
| Investment advisory and management fees | 2012-12-31 | $91,254 |
| Income. Interest from corporate debt instruments | 2012-12-31 | $19,929,360 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2012-12-31 | $70,760,909 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2012-12-31 | $46,126,346 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2012-12-31 | $46,126,346 |
| Asset. Corporate debt instrument debt (other) at end of year | 2012-12-31 | $720,463,510 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2012-12-31 | $738,776,205 |
| Aggregate proceeds on sale of assets | 2012-12-31 | $3,189,653,128 |
| Aggregate carrying amount (costs) on sale of assets | 2012-12-31 | $3,183,174,779 |
| 2011 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2011 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2011-12-31 | $12,655,805 |
| Total unrealized appreciation/depreciation of assets | 2011-12-31 | $12,655,805 |
| Total transfer of assets to this plan | 2011-12-31 | $198,017,844 |
| Total transfer of assets from this plan | 2011-12-31 | $229,954,364 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $114,662,560 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2011-12-31 | $83,896,783 |
| Total income from all sources (including contributions) | 2011-12-31 | $45,062,846 |
| Total loss/gain on sale of assets | 2011-12-31 | $5,367,381 |
| Total of all expenses incurred | 2011-12-31 | $136,080 |
| 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 | $829,627,316 |
| Value of total assets at beginning of year | 2011-12-31 | $785,871,293 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2011-12-31 | $136,080 |
| Total interest from all sources | 2011-12-31 | $27,039,660 |
| Total dividends received (eg from common stock, registered investment company shares) | 2011-12-31 | $0 |
| Administrative expenses professional fees incurred | 2011-12-31 | $23,810 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2011-12-31 | $44,724,765 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2011-12-31 | $23,687,879 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2011-12-31 | $114,662,560 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2011-12-31 | $83,896,783 |
| Value of net income/loss | 2011-12-31 | $44,926,766 |
| Value of net assets at end of year (total assets less liabilities) | 2011-12-31 | $714,964,756 |
| Value of net assets at beginning of year (total assets less liabilities) | 2011-12-31 | $701,974,510 |
| Investment advisory and management fees | 2011-12-31 | $112,270 |
| Income. Interest from corporate debt instruments | 2011-12-31 | $27,039,660 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2011-12-31 | $46,126,346 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2011-12-31 | $62,586,733 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2011-12-31 | $62,586,733 |
| Asset. Corporate debt instrument debt (other) at end of year | 2011-12-31 | $738,776,205 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2011-12-31 | $699,596,681 |
| Aggregate proceeds on sale of assets | 2011-12-31 | $2,066,001,710 |
| Aggregate carrying amount (costs) on sale of assets | 2011-12-31 | $2,060,634,329 |
| 2010 : MORTGAGE-BACKED SECURITIES INDEX FUND B 2010 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2010-12-31 | $3,945,810 |
| Total unrealized appreciation/depreciation of assets | 2010-12-31 | $3,945,810 |
| Total transfer of assets to this plan | 2010-12-31 | $140,215,434 |
| Total transfer of assets from this plan | 2010-12-31 | $154,384,631 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $83,896,783 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2010-12-31 | $101,390,186 |
| Total income from all sources (including contributions) | 2010-12-31 | $38,012,249 |
| Total loss/gain on sale of assets | 2010-12-31 | $7,214,913 |
| Total of all expenses incurred | 2010-12-31 | $114,577 |
| 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 | $785,871,293 |
| Value of total assets at beginning of year | 2010-12-31 | $779,636,221 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2010-12-31 | $114,577 |
| Total interest from all sources | 2010-12-31 | $26,851,526 |
| Total dividends received (eg from common stock, registered investment company shares) | 2010-12-31 | $0 |
| Administrative expenses professional fees incurred | 2010-12-31 | $23,810 |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2010-12-31 | $23,687,879 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2010-12-31 | $13,616,514 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year | 2010-12-31 | $83,896,783 |
| Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year | 2010-12-31 | $101,390,186 |
| Value of net income/loss | 2010-12-31 | $37,897,672 |
| Value of net assets at end of year (total assets less liabilities) | 2010-12-31 | $701,974,510 |
| Value of net assets at beginning of year (total assets less liabilities) | 2010-12-31 | $678,246,035 |
| Investment advisory and management fees | 2010-12-31 | $90,767 |
| Income. Interest from corporate debt instruments | 2010-12-31 | $26,669,149 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2010-12-31 | $62,586,733 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2010-12-31 | $103,661,423 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2010-12-31 | $103,661,423 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2010-12-31 | $182,377 |
| Asset. Corporate debt instrument debt (other) at end of year | 2010-12-31 | $699,596,681 |
| Asset. Corporate debt instrument debt (other) at beginning of year | 2010-12-31 | $662,358,284 |
| Aggregate proceeds on sale of assets | 2010-12-31 | $1,461,660,972 |
| Aggregate carrying amount (costs) on sale of assets | 2010-12-31 | $1,454,446,059 |
