Summary Prospectus by Investment Company (Form 497K)

or seller, as the case may be, to consummate the transaction. These transactions also have a leveraging effect on a fund because the fund commits to purchase securities that it does not have to pay for until a later date, which increases the fund's overall investment exposure and, as a result, its volatility.

Emerging Markets Risk - Emerging markets may have less developed or more volatile trading markets and greater likelihood of government restrictions, nationalization, or confiscation than developed countries. Companies in emerging market countries may have less developed legal and accounting systems and generally may be subject to less stringent regulatory, disclosure, financial reporting, accounting, auditing and recordkeeping standards than companies in more developed countries. As a result, information, including financial information, about such companies may be less available and reliable which can impede a fund's ability to evaluate such companies. Securities law and the enforcement of systems of taxation in many emerging market countries may change quickly and unpredictably, and the ability to bring and enforce actions, or to obtain information needed to pursue or enforce such actions, may be limited. In addition, investments in emerging markets securities may be subject to additional transaction costs, delays in settlement procedures, unexpected market closures, and lack of timely information. Frontier market countries generally have smaller economies or less developed capital markets and, as a result, the risks of investing in emerging market countries are magnified in frontier market countries.

Depositary Receipt Risk - Depositary receipts involve many of the same risks as those associated with direct investment in foreign securities. Investing in these instruments may expose a fund to credit risk with respect to the issuer of the depositary receipt, in addition to the risks of the underlying investment.

Currency Risk - Investing in securities that trade in and receive revenues in foreign currencies creates risk because foreign currencies may decline relative to the U.S. dollar, resulting in a potential loss to a fund.

Derivatives Risk - Investing in derivative instruments involves risks that may be different from or greater than the risks associated with investing directly in securities or other traditional investments. Derivatives are subject to a number of other risks, such as liquidity risk, interest rate risk, market risk, credit risk, counterparty risk, and selection risk. Derivatives also involve the risk of mispricing or improper valuation and the risk that changes in the value may not correlate perfectly with the underlying asset, rate, or index. Using derivatives may result in losses, possibly in excess of the principal amount invested.

Futures Risk - The value of futures contracts depend primarily upon the price of the securities, indexes, commodities, currencies or other instruments underlying them. Price movements are also influenced by, among other things, interest rates, changing supply and demand relationships, trade, fiscal, monetary, and exchange control programs and policies of governments, and national and international political and economic events and policies. The cost of futures may also be related, in part, to the degree of volatility of the underlying indices, securities, currencies, or other assets. Accordingly, futures on highly volatile indices, securities, currency, or other assets may be more expensive than futures on other investments. Changes in the value of the derivative may not correlate perfectly with the underlying asset, rate or index, and a fund could lose more than the principal amount invested.

Swaps Risk - A swap is a two-party contract that generally obligates each counterparty to exchange periodic payments based on a pre-determined underlying investment or notional amount and to exchange collateral to secure the obligations of each counterparty. Swaps may be leveraged and are subject to counterparty risk, credit risk and pricing risk. Swaps may be subject to illiquidity risk, and it may not be possible for the fund to liquidate a swap position at an advantageous time or price, which may result in significant losses.

Credit Risk - The failure of the issuer of a debt security to pay interest or repay principal in a timely manner may have an adverse impact on a fund's earnings.

Liquidity Risk - An investment that is difficult to purchase or sell may have an adverse effect on the fund's returns. Liquid securities can become illiquid during periods of market stress. If a significant amount of the fund's securities become illiquid, the fund may not be able to timely pay redemption proceeds and may need to sell securities at significantly reduced prices.

Interest Rate Risk - Debt securities held by a fund may decline in value due to rising interest rates. Macroeconomic factors, such as inflationary trends, can heighten interest rate risk.