Strategy. The Fund is a fund of funds that invests in Class W shares of other Nuveen mutual funds and in other investment pools or investment products, including other funds or exchange-traded funds (ETFs) advised by the Funds investment adviser, Teachers Advisors, LLC (Advisors), or its affiliates (collectively, the Underlying Funds). In general, the Fund is designed for investors who have an approximate target retirement year in mind, and the Funds investments are adjusted from more aggressive to more conservative over time as the Funds target retirement year approaches and for approximately 30 years afterwards. The Fund invests in Underlying Funds according to an asset allocation strategy designed for investors retiring in, or planning to retire within a few years of, … Show more… The Fund is a fund of funds that invests in Class W shares of other Nuveen mutual funds and in other investment pools or investment products, including other funds or exchange-traded funds (ETFs) advised by the Funds investment adviser, Teachers Advisors, LLC (Advisors), or its affiliates (collectively, the Underlying Funds). In general, the Fund is designed for investors who have an approximate target retirement year in mind, and the Funds investments are adjusted from more aggressive to more conservative over time as the Funds target retirement year approaches and for approximately 30 years afterwards. The Fund invests in Underlying Funds according to an asset allocation strategy designed for investors retiring in, or planning to retire within a few years of, 2070 and who may begin taking systematic withdrawals upon retirement. The Fund has a policy of investing at least 80% of its assets (net assets, plus the amount of any borrowings for investment purposes) in Underlying Funds that are managed to seek investment returns that track particular market indices. Advisors currently expects to allocate approximately 94.75% of the Funds assets to equity Underlying Funds and 5.25% of its assets to fixed-income Underlying Funds. These allocations represent targets for equity and fixed-income asset classes. Target allocations will change over time and actual allocations may vary up to ten percentage points from the targets. The target allocations along the investment glidepath, illustrated in the chart below, gradually become more conservative, moving to target allocations of approximately 50% equity/50% fixed-income in the Funds target retirement year of 2070 and reaching the Funds final target allocation of approximately 20.00% equity/80.00% fixed-income in 2100. Within the equity and fixed-income asset classes, Advisors allocates the Funds investments to particular market sectors (U.S. equity, international equity, fixed-income, non-USD fixed-income, high yield bond, short-term fixed-income and inflation-protected assets) represented by various Underlying Funds. These market sector allocations may vary by up to 10% from the Funds target market sector allocations. The Funds current target market sector allocations for June 30, 2026, which will change over time, are approximately as follows: U.S. Equity: 61.59%; International Equity: 33.16%; Fixed-Income: 4.20%; Non-USD Fixed-Income: 1.05%; High Yield Bond: 0.00%; Short-Term Fixed-Income: 0.00%; and Inflation-Protected Assets: 0.00%. The asset class and market sector names used herein are intended to reflect the primary type of investment of the Underlying Funds within each of these categories. The Funds target market sector allocations to Underlying Funds may include the Nuveen Equity Index Fund (U.S. Equity); Nuveen Emerging Markets Equity Index Fund and Nuveen International Equity Index Fund (International Equity); Nuveen Bond Index Fund (Fixed-Income); Nuveen International Aggregate Bond ETF (Non-USD Fixed-Income); Nuveen High Yield Corporate Bond ETF (High Yield Bond); Nuveen Short Term Bond Index Fund (Short-Term Fixed-Income); and Nuveen Inflation Linked Bond Fund (Inflation-Protected Assets). As a result of its investments in the Underlying Funds, the Funds returns will reflect investments in a mix of domestic and foreign equities of companies of various sizes and market capitalizations and a variety of domestic and foreign fixed-income instruments of private and governmental issuers of varying maturities and credit qualities. Additional or replacement Underlying Funds for each market sector, as well as additional or replacement market sectors, may be included when making future allocations if Advisors believes that such Underlying Funds and/or market sectors are appropriate in light of the Funds desired levels of risk and potential return at the particular time. The Funds portfolio management team may also add a new market sector if it believes that will help to achieve the Funds investment objective. The relative allocations among Underlying Funds within a market sector may be changed at any time without notice to shareholders. If 10% or more of the Funds assets are expected to be invested in any Underlying Fund or market sector not listed above, shareholders will receive prior notice of such change. As part of the Funds ability to invest in other investment pools or investment products noted above, the Fund may invest in ETFs and exchange-traded notes (ETNs) to gain exposure to various market sectors or securities in order to effect its asset allocation strategy. Additionally, the Fund may use ETFs or ETNs for cash management, hedging or defensive purposes. ETFs or ETNs will be subject to the risks associated with the types of securities or sectors that they track, while ETNs, which are structured as fixed-income obligations, will also be subject to the general risks of fixed-income securities, including credit risk. The Funds current target asset class allocations, market sector allocations within each asset class, and Underlying Fund allocations within each market sector, as of the date of this Prospectus, are listed in the chart below. These allocations will change over time, and it may take time for the Fund to reach these target allocations. Underlying Fund allocations in particular may change from year to year. Asset Class Allocation Market Sector Allocation Underlying Funds Allocation Equity 94.94% U.S. Equity 61.71% ? Nuveen Equity Index 61.71% International Equity 33.23% ? Nuveen International Equity Index 22.66% ? Nuveen Emerging Markets Equity Index 10.57% Fixed-Income 5.06% Fixed-Income 4.05% ? Nuveen Bond Index 4.05% Non-USD Fixed-Income 1.01% ? Nuveen International Aggregate Bond ETF 1.01% Total 100.00% 100.00% 100.00% The following chart shows how the investment glidepath for the Fund is expected to gradually move the Funds target allocations over time between the different target market sector allocations. The actual market sector allocations of the Fund may differ from this chart. The Fund seeks to achieve its final target market sector allocations approximately 30 years following the target date. The Fund is designed to accommodate investors who invest in a fund up to their target retirement date, and plan to make gradual systematic withdrawals in retirement. In addition, investors should note that the Fund will continue to have a significant level of equity exposure up to, through and after its target retirement date, and this exposure could cause significant fluctuations in the value of the Fund depending on the performance of the equity markets generally. After the Fund reaches its final target allocation, the Board of Trustees may authorize the merger of the Fund into another Lifecycle Index Fund which has also reached its final target allocation or other similar fund designed to maintain a relatively stable asset allocation reflecting the resting point on the glidepath described in the chart above. Fund shareholders will receive prior notice of any such merger. Show less