Index performance does not represent the fund's performance. It is not possible to invest directly in an index.
Exchange Traded Funds (ETFs) are bought and sold through exchange trading at market price (not NAV), and are not individually redeemed from the fund. Shares may trade at a premium or discount to their NAV in the secondary market. Brokerage commissions will reduce returns.
This fund is an actively managed ETF that does not seek to replicate the performance of a specified index. To determine whether to buy or sell a security, the portfolio managers consider, among other things, various fund requirements and standards, along with economic conditions, alternative investments, interest rates and various credit metrics. If the portfolio manager considerations are inaccurate or misapplied, the fund's performance may suffer.
The interest rate and corresponding payment that floating rate securities are expected to pay adjust at predetermined dates on a periodic basis. Securities with floating interest rates are generally less sensitive to interest rate changes than securities with fixed interest rates, but they may decline in value if their interest rates do not rise as much, or as quickly, as comparable market interest rates. In addition, floating rate securities held by the fund may be less liquid or more difficult to sell than other securities. If it becomes necessary for the fund to sell less liquid securities, it could have an adverse effect on the fund, especially during periods of market turbulence or unusually low trading activity.
The value of the securities that the fund principally invests in may be secured or backed by other underlying assets or obligations. As such, the value of these securities may affected by the market value of the underlying assets, changes in the distributions on the underlying assets, defaults and recoveries on the underlying assets, capital gains and losses on the underlying assets, prepayments on underlying assets and the availability, prices and interest rate of underlying assets. In addition, these securities may be subject to number of additional risks, including interest rate, market, credit and correlation risk. Use of certain types of these securities can create economic leverage in the fund's portfolio, which may result in significant volatility and cause the fund to participate in losses in an amount that exceeds the fund's initial investment. Also, the value of these securities may decrease based on the inability or perceived inability of a security's issuer or obligated party to make interest and principal payments.
Duration, which is an indication of the relative sensitivity of a security's market value to changes in interest rates, is based upon the aggregate of the present value of all principal and interest payments to be received, discounted at the current market rate of interest and expressed in years. The longer the weighted average duration of the fund's portfolio, the more sensitive its market value is to interest rate fluctuations. Duration is different from maturity in that it attempts to measure the interest rate sensitivity of a security, as opposed to its expected final maturity.
Generally, as interest rates rise, the value of the securities held in the fund will decline. The opposite is true when interest rates decline.
The lower rated securities in which the fund invests are subject to greater credit risk, default risk and liquidity risk.
The gross expense ratio is the fund's total annual operating costs, expressed as a percentage of the fund's average net assets for a given time period. It is gross of any fee waivers or expense reimbursement. The net expense ratio is the expense ratio after the application of any waivers or reimbursement. This is the actual ratio that investors paid during the fund's most recent fiscal year. Please see the prospectus for more information.
Bloomberg U.S. 1-3 Month Treasury Bill Index
A sub index of the Bloomberg U.S. Short Treasury Index, the Bloomberg U.S. 1-3 Month Treasury Bill Index is composed of zero-coupon Treasury bills with a maturity between 1 and 3 months. As Treasury bonds and notes fall below one year-to-maturity and exit the Bloomberg U.S. Treasury Index, they become eligible for the Bloomberg U.S. Short Treasury Index. It excludes zero coupon strips.
Closing Price: The price of the last reported trade on the fund's primary exchange.
Bid Ask Midpoint: The midpoint between the highest bid and the lowest offer on the primary listing exchange, as of the time that the Fund's NAV is calculated, generally around 4 p.m. (Eastern time).
Premium Discount: A premium is the amount that the fund is trading above the reported NAV, expressed as a percentage of the NAV. A discount is the amount that the fund is trading below the reported NAV, expressed as a percentage of the NAV.
ETF Market Performance (Inception to Date): The fund's per share Net Asset Value (NAV) is the value of one share of the fund. Market Price is determined by using the midpoint between the highest bid and the lowest offer on the primary stock exchange on which the shares of the fund are listed for trading, as of the time that the fund's NAV is calculated. The NAV Return is based on the NAV of the fund, and the Market Price Return is based on the market price per share of the fund. Since shares of the fund did not trade in the secondary market until after the fund's inception, for the period from inception to the first day of secondary market trading in shares of the fund, the NAV of the fund is used as a proxy for the Market Price to calculate market returns. Market Price and NAV returns assume that dividends and capital gain distributions have been reinvested in the fund at Market Price and NAV, respectively.
Weighted Average Coupon: The weighted average interest rate paid by the securities in the pool.
Option Adjusted Duration (OAD): OAD is the effective duration. It is a duration calculation for bonds that have embedded options. This measure of duration takes into account the fact that expected cash flows will fluctuate as interest rates change. The effective duration measures the percentage change in price for a 100 basis points parallel shift in the yield curve. Positive duration means that as rates rise, the price decreases, and negative duration means that as rates rise, the price increases.
Option Adjusted Spread (OAS): The measurement of the spread (in basis points) of a fixed-income security rate and the risk-free rate of return, which is adjusted to take into account an embedded option.
Holdings: The number of holdings in the fund excluding cash positions and derivatives such as futures and currency forwards.
Investment Blend: Reflects the blend of securities owned by a fund. For example, the percentage of foreign or domestic stocks held by an equity fund or the percentage of corporate and government securities owned by a bond fund. The U.S./Foreign Convertibles grouping includes Convertible Bonds, Equity Linked Securities and Convertible Preferred securities.
Top Holdings: This value represents the top holdings included in the portfolio on a percent of assets basis. Holdings are subject to change without notice. Shares are units of ownership interest in a corporation or financial asset that provide for an equal distribution in any profits, if any are declared, in the form of dividends. In the context of debt instruments, principal can refer to the face value, or par value, of a bond—that is, the actual amount listed on the bond itself. American Century Investments publishes this listing of identities and quantities of each position held by the fund on each business day, before commencement of trading. Securities are reported at market value. The portfolio data and its presentation here may differ from the complete schedules of investments in regulatory filings due to differing accounting and reporting requirements.
Quality: Describes the portfolio of the fund in terms of the quality ratings of the securities it holds. Cash and cash equivalents include payable amounts related to securities purchased but not settled at period end. Credit quality ratings on underlying securities of a fund are obtained from three Nationally Recognized Statistical Rating Organizations ("NRSROs"), Standard & Poor's, Moody's and Fitch. Ratings are converted to the equivalent Standard & Poor's rating category for purposes of presentation. The median rating is used for securities rated by all three NRSROs. The common rating is used when two of the three NRSROs agree. The lower rating is used when only two NRSROs rate a security. A "nonrated" designation is assigned when a public rating is not available for a security. This designation does not necessarily indicate low credit quality. The letter ratings are provided to indicate the credit worthiness of the underlying bonds in the portfolio and generally range from AAA (highest) to D (lowest). Includes payable amounts related to securities purchased but not settled at period end.
Maturity: Describes the portfolio of the fund in terms of the different maturities of the securities it holds.
Weighted Average Life to Maturity (WALM): Is a measure of the sensitivity of a fixed income portfolio to interest rate changes. WALM is the average time in years to receive the principal repayments. Accordingly, WALM reflects how a portfolio would react to deteriorating credit or tightening liquidity conditions.
Duration: Describes the portfolio of the fund in terms of the different durations of the securities it holds.
For detailed descriptions of indices or investing terms referenced above, refer to our glossary.
Source: Bloomberg Index Services Ltd
Exchange Traded Funds (ETFs): Foreside Fund Services, LLC - Distributor, not affiliated with American Century Investment Services, Inc.