Market Risk. Market risk is the possibility that the market values of securities owned by the Fund will decline. Investments in debt securities generally are affected by changes in interest rates and the creditworthiness of the issuer. The prices of debt securities tend to fall as interest rates rise, and such declines tend to be greater among debt securities with longer maturities. As interest rates change, zero coupon bonds or pay-in-kind securities often fluctuate more in price than traditional debt securities.

Credit Risk. Credit risk refers to an issuer's ability to make timely payments of interest and principal. The credit quality of noninvestment-grade securities is considered speculative by recognized rating agencies with respect to the issuer's continuing ability to pay interest and principal. Lower-grade securities (also sometimes known as junk bonds) may have less liquidity and a higher incident of default than higher-grade securities. The Fund may incur higher expenses to protect the Fund's interest in such securities. The credit risks and market prices of medium- and lower-grade securities, especially those with longer maturities or those that do not make regular interest payment, generally are more sensitive to negative issuer developments or adverse economic conditions and may be more volatile than are higher-grade securities.

Income Risk. The income you receive from the Fund is based primarily on prevailing interest rates, which can vary widely over the short and long term. If interest rates drop, your income from the Fund may drop as well. To the extent that the Adviser invests in higher-grade securities at times, the amount of current income from such securities may be lower than the income from medium- and lower-grade securities.

Call Risk. If interest rates fall, it is possible that issuers of debt securities with high interest rates will prepay or call their securities before their maturity dates. In this event, the proceeds from the called securities would likely be reinvested by the Fund in securities bearing the new, lower interest rates, resulting in a possible decline in the Fund's income and distributions to shareholders.

Municipal Securities Risk. Under normal market conditions, the Fund invests primarily in municipal securities. The yields of municipal securities may move differently and adversely compared to the yields of the overall debt securities markets. There could be changes in applicable tax laws or tax treatments that adversely affect the current federal or state tax status of municipal securities.

State-Specific Risks. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of Pennsylvania municipal securities than a fund that does not limit its investments to such issuers.

Risks of Using Derivative Instruments. Risks of derivatives include imperfect correlation between the value of the instruments and the underlying assets; risks of default by the other party to certain transactions; risks that the transactions may result in losses that partially or completely offset gains in portfolio positions; and risks that the transactions may not be liquid.

Inverse Floating Rate Municipal Obligations. The inverse floating rate municipal obligations in which the Fund may invest include derivative instruments such as residual interest bonds (RIBs) or tender option bonds (TOBs). Such instruments are typically created by a special purpose trust that holds long-term fixed rate bonds and sells two classes of beneficial interests: short-term floating rate interests, which are sold to third party investors, and inverse floating residual interests, which are purchased by the Fund. The short-term floating rate interests have first priority on the cash flow from the bond held by the special purpose trust and the Fund is paid the residual cash flow from the bond held by the special purpose trust. The interest rates on these obligations generally move in the reverse direction of market interest rates. If market interest rates fall, the interest rate on the obligations will increase and if market interest rates increase, the interest rate on the obligations will fall.

Alternative Minimum Tax. The Fund may invest up to 20% of its total assets in securities subject to the federal alternative minimum tax. Since some investors may have to pay tax on a Fund distribution of this income, the Fund may not be a suitable investment for them.

Synthetic Securities Risk. Fluctuations in the values of synthetic securities may not correlate perfectly with the instruments they are designed to replicate. Synthetic securities may be subject to interest rate changes, market price fluctuations, counterparty risk and liquidity risk.