3. Credit and Market Risk
The Fund concentrates its investments in securities issued by municipalities. On September 13, 2007, shareholders of Delaware Investments National Municipal Income Fund (formerly Delaware Investments Florida Insured Municipal Income Fund) approved (1) the elimination of the Fund’s fundamental investment policy that required the Fund to invest primarily in insured municipal securities issued by the State of Florida and (2) the adoption of a new fundamental investment policy permitting the Fund to invest in un-insured municipal securities issued by states other than Florida. The Fund’s portfolio managers began to transition the Fund’s portfolio to include un-insured municipal bonds issued by other states and territories on October 15, 2007. As of June 30, 2009, municipal bonds issued by the state of Florida constitute approximately 54% of the Fund’s portfolio. These investments could make the Fund more sensitive to economic conditions in Florida than other more geographically diversified national municipal income funds. The value of these investments may be adversely affected by new legislation within the states, regional or local economic conditions, and differing levels of supply and demand for municipal bonds. Many municipalities insure repayment for their obligations. Although bond insurance reduces the risk of loss due to default by an issuer, such bonds remain subject to the risk that value may fluctuate for other reasons and there is no assurance that the insurance company will meet its obligations. A real or perceived decline in creditworthiness of a bond insurer can have an adverse impact on the value of insured bonds held in the Fund. At June 30, 2009, 61% of the Fund’s net assets were insured by bond insurers. These securities have been identified in the schedule of investments.

The Fund invests a portion of its assets in high yield fixed income securities, which carry ratings of BB or lower by Standard & Poor’s Ratings Group (S&P) and/or Ba or lower by Moody’s Investors Service, Inc. (Moody’s). Investments in these higher yielding securities are generally accompanied by a greater degree of credit risk than higher rated securities. Additionally, lower rated securities may be more susceptible to adverse economic and competitive industry conditions than investment grade securities.

The Fund may invest in advanced refunded bonds, escrow secured bonds or defeased bonds. Under current federal tax laws and regulations, state and local government borrowers are permitted to refinance outstanding bonds by issuing new bonds. The issuer refinances the outstanding debt to either reduce interest costs or to remove or alter restrictive covenants imposed by the bonds being refinanced. A refunding transaction where the municipal securities are being refunded within 90 days from the issuance of the refunding issue is known as a "current refunding". "Advance refunded bonds" are bonds in which the refunded bond issue remains outstanding for more than 90 days following the issuance of the refunding issue. In an advance refunding, the issuer will use the proceeds of a new bond issue to purchase high grade interest bearing debt securities which are then deposited in an irrevocable escrow account held by an escrow agent to secure all future payments of principal and interest and bond premium of the advance refunded bond. Bonds are "escrowed to maturity" when the proceeds of the refunding issue are deposited in an escrow account for investment sufficient to pay all of the principal and interest on the original interest payment and maturity dates.

Bonds are considered "pre-refunded" when the refunding issue's proceeds are escrowed only until a permitted call date or dates on the refunded issue with the refunded issue being redeemed at the time, including any required premium. Bonds become "defeased" when the rights and interests of the bondholders and of their lien on the pledged revenues or other security under the terms of the bond contract and are substituted with an alternative source of revenues (the escrow securities) sufficient to meet payments of principal and interest to maturity or to the first call dates. Escrowed secured bonds will often receive a rating of AAA from Moody's, S&P, and/or Fitch Ratings due to the strong credit quality of the escrow securities and the irrevocable nature of the escrow deposit agreement.

The Fund may invest up to 15% of its net assets in illiquid securities, which may include securities with contractual restrictions on resale, securities exempt from registration under Rule 144A of the Securities Act of 1933, as amended, and other securities which may not be readily marketable. The relative illiquidity of these securities may impair the Fund from disposing of them in a timely manner and at a fair price when it is necessary or desirable to do so. While maintaining oversight, the Fund’s Board has delegated to Delaware Management Company, a series of Delaware Management Business Trust, the day-to-day functions of determining whether individual securities are liquid for purposes of the Fund’s limitation on investments in illiquid assets. Securities eligible for resale pursuant to Rule 144A, which are determined to be liquid, are not subject to the Fund’s 15% limit on investments in illiquid securities. As of June 30, 2009, there were no Rule 144A securities and no securities have been determined to be illiquid under the Fund’s Liquidity Procedures.

6. Subsequent Events – Purchase of Delaware Investments by Macquarie Group
On August 19, 2009, Lincoln National Corporation and Macquarie Group (“Macquarie”) entered into an agreement pursuant to which Delaware Investments, including Delaware Management Company (DMC), Delaware Distributors, L.P. (DDLP), and Delaware Service Company (DSC), will be acquired by Macquarie, an Australia-based global provider of banking, financial, advisory, investment and funds management services (the “Transaction”). Upon completion of the Transaction, DMC, DDLP and DSC will be wholly-owned subsidiaries of Macquarie.

The Transaction will result in a change of control of DMC which, in turn, will cause the termination of the investment advisory agreement between DMC and the Fund. As a result, a Special Meeting of Shareholders (the “Meeting”) of the Fund will be scheduled for the purpose of asking shareholders to approve a new investment advisory agreement between DMC and the Fund (the “New Agreement”). If approved by shareholders, the New Agreement will take effect upon the closing of the Transaction, which is currently anticipated to occur in the fourth quarter of 2009. Shareholders of the Fund will receive proxy materials including more detailed information about the Meeting, the Transaction and the proposed New Agreement.

Effective June 30, 2009, the Fund adopted Financial Accounting Standards Board Statement of Financial Accounting Standards No. 165, Subsequent Events (FAS 165). In accordance with FAS 165, management has evaluated whether any events or transactions occurred subsequent to June 30, 2009 through August 15, 2009, the date of issuance of the Fund’s schedule of portfolio holdings, and determined that there were no other material events or transactions that would require recognition or disclosure in the Fund’s schedule of portfolio holdings.