Strategy. Under normal circumstances, the Fund invests at least 80% of its assets in bonds. For these purposes, bonds include fixed-income securities of all types, including bonds and notes (such as corporate and government debt obligations), mortgage-backed securities, asset-backed securities, structured securities that generally pay fixed or variable rates of interest, and loans and loan participations; debt obligations issued at a discount from face value (i.e., that have an imputed rate of interest); non-interest-bearing debt securities (i.e., zero coupon bonds); and other non-equity securities that pay dividends. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, mortgage-backed and other asset-backed securities, convertible and preferred securities, senior … Show more… Under normal circumstances, the Fund invests at least 80% of its assets in bonds. For these purposes, bonds include fixed-income securities of all types, including bonds and notes (such as corporate and government debt obligations), mortgage-backed securities, asset-backed securities, structured securities that generally pay fixed or variable rates of interest, and loans and loan participations; debt obligations issued at a discount from face value (i.e., that have an imputed rate of interest); non-interest-bearing debt securities (i.e., zero coupon bonds); and other non-equity securities that pay dividends. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, mortgage-backed and other asset-backed securities, convertible and preferred securities, senior loans and loan participations and assignments and notes. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called high-yield or junk bonds). Securities of non-investment- grade quality are speculative in nature. The Fund does not rely exclusively on rating agencies when making investment decisions. Instead, the Funds investment adviser, Teachers Advisors, LLC (Advisors), performs its own credit analysis, paying particular attention to economic trends and other market events. The Fund may also invest in securities having a variable or floating interest rate. Individual securities or sectors may be overweighted or underweighted relative to the Funds benchmark index, the Bloomberg U.S. Aggregate Bond Index, when Advisors believes that such overweight or underweight may cause the Fund to outperform the index. For purposes of the 80% investment policy, the term assets means net assets, plus the amount of any borrowings for investment purposes. The Fund may invest in fixed-income securities of any duration. As of December 31, 2024, the duration of the Funds benchmark index, the Bloomberg U.S. Aggregate Bond Index, was 6.02 years. The Funds investments in mortgage-backed securities can include pass-through securities sold by private, governmental and government-related organizations and collateralized mortgage obligations (CMOs). Mortgage pass-through securities are created when mortgages are pooled together and interests in the pool are sold to investors. The cash flow from the underlying mortgages is passed through to investors in periodic principal and interest payments. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO. The Fund may use an investment strategy called mortgage rolls (also referred to as dollar rolls), in which the Fund sells securities for delivery in the current month and simultaneously contracts with a counterparty to repurchase similar (same type, coupon and maturity) but not identical securities on a specified future date. The Fund loses the right to receive principal and interest paid on the securities sold. However, the Fund would benefit to the extent of any price received for the securities sold and the lower forward price for the future purchase (often referred to as the drop) plus the interest earned on the short-term investment awaiting the settlement date of the forward purchase. If such benefits exceed the income and gain or loss due to mortgage repayments that would have been realized on the securities sold as part of the mortgage roll, the use of this technique will enhance the investment performance of the Fund compared with what such performance would have been without the use of mortgage rolls. Realizing benefits from the use of mortgage rolls depends upon the ability of Advisors to correctly predict mortgage prepayments and interest rates. The Fund may also engage in relative value trading, a strategy in which the Fund reallocates assets across different sectors and maturities. Relative value trading is designed to enhance the Funds returns but increases the Funds portfolio turnover rate. The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Funds investment strategies. The Fund may also invest in foreign securities, including emerging markets fixed-income securities and non-dollar-denominated instruments. Under most circumstances, the Funds investments in fixed-income securities of foreign issuers constitute less than 25% of the Funds assets. Show less