characteristics similar to the Fund’s
direct investments that are counted toward the 80% investment requirement.
Under normal market conditions, Invesco Advisers, Inc. (Invesco or the Adviser) seeks to
achieve the Fund’s investment objective by investing at least 65% of the Fund’s net assets in investment grade municipal securities. Investment grade securities are: (i) securities rated BBB- or higher by S&P Global Ratings (S&P)
or Baa3 or higher by Moody’s Investors Service, Inc. (Moody’s) or an equivalent rating by another nationally recognized statistical rating organization (NRSRO), (ii) securities with comparable short-term NRSRO ratings, or
(iii) unrated securities determined by the Adviser to be of comparable quality, each at the time of purchase. If two or more NRSROs have assigned different ratings to a security, the Adviser uses the highest rating assigned.
Municipal securities include debt obligations of states, territories or possessions of the United States and the District of Columbia and their political subdivisions, agencies and
instrumentalities, the interest on which is exempt from federal income tax, at the time of issuance, in the opinion of bond counsel or other counsel to the issuers of such securities.
The principal types of municipal debt securities purchased by the Fund are
revenue obligations and general obligations. To meet its investment objective, the Fund invests in different types of general obligation and revenue obligation securities, including fixed and variable rate securities, municipal notes, variable rate
demand notes, municipal leases, custodial receipts, and participation certificates. The Fund may invest in these and other types of municipal securities. Under normal market conditions, the Fund invests primarily in municipal
securities classified as revenue bonds.
Under normal market conditions, the Fund may invest up to 35% of its net
assets in municipal securities rated below investment grade and unrated municipal securities determined by the Adviser to be of comparable quality at the time of purchase. This restriction is applied at the time of purchase and the Fund may continue to hold
a security whose credit rating has been downgraded or, in the case of an unrated security, after the Fund’s Adviser has changed its assessment of the security’s credit quality. As a result, credit rating downgrades or
other market fluctuations may cause the Fund’s holdings of below-investment grade securities to exceed, at times significantly, this restriction for an extended period of time. These types of securities are commonly
referred to as junk bonds. With respect to such investments, the Fund has not established any limit on the percentage of its portfolio that may be invested in securities in any one rating category.
The Fund may invest more than 25% of its net assets in a segment of the municipal securities market with similar characteristics if the Adviser determines that the yields
available from obligations in a particular segment justify the additional risks of a larger investment in such segment. The Fund may not, however, invest more than 25% of its net assets in industrial development revenue bonds issued for
companies in the same industry.
The Fund may invest all or a substantial portion of
its assets in municipal securities that are subject to the federal alternative minimum tax. From
time to time, the Fund temporarily may invest up to 10% of its net assets in tax exempt money market funds and such instruments will be treated as investments in municipal securities.
The Fund has no policy limiting its investments in municipal securities
whose issuers are located in the same state. However, it is not the present intention of the Fund
to invest more than 25% of the value of its net assets in issuers located in the same state.
The Fund may invest in illiquid or thinly traded investments. The Fund may
also invest in securities that are subject to resale restrictions and/or exempt from registration under the Securities Act of 1933, as amended (Securities Act), such as those contained in Rule 144A promulgated under the Securities Act. The Fund’s
investments may include securities that do not produce immediate cash income, such as zero coupon securities and payment-in-kind securities.
The Fund may purchase and sell securities on a when-issued and delayed
delivery basis, which means that the Fund may buy or sell a security with payment and delivery taking place in the future.
The Fund can invest in
inverse floating rate interests (Inverse Floaters) issued in connection with tender option bond (TOB) financing transactions to generate leverage for the Fund. The Fund’s investments in Inverse Floaters are included for purposes of
the 80% policy described above.
The Fund can invest in derivative instruments
including futures contracts and swap contracts.
The Fund can use futures contracts, including interest rate futures, to
reduce exposure to interest rate changes and to manage duration.
The Fund can use swap contracts, including interest rate swaps, to hedge its exposure to interest rates.
The Fund can borrow money to purchase additional securities, another form of leverage. The Fund may also borrow to meet redemption obligations or for temporary and emergency
purposes. Although the amount of borrowing will vary from time to time, the amount of leveraging from borrowings will not exceed one-third of the Fund’s total assets.
The Fund can invest up to 20% of its net assets (plus borrowings for investment purposes) in investments that generate income subject to income taxes. Taxable investments include
many of the types of securities the Fund would buy for temporary defensive purposes. The Fund does not anticipate investing substantial amounts of its assets in taxable investments under normal market conditions
or as part of its normal trading strategies and policies.
The Adviser actively manages the Fund’s portfolio and adjusts the
average maturity of portfolio investments based upon its expectations regarding the direction of
interest rates and other economic factors. The Adviser seeks to identify those securities that it believes entail reasonable credit risk considered in relation to the Fund’s investment policies. In selecting securities for
investment, the Adviser uses its extensive research capabilities to assess potential investments and considers a number of factors, including general market and economic conditions and interest rate, credit and prepayment risks. Each
security considered for investment is subjected to an in-depth credit analysis to evaluate the level of risk it presents.
The Fund
can invest up to 25% of its total assets in tobacco settlement revenue bonds, which make payments only from a state’s interest in the Master Settlement Agreement (MSA), and up to 25% of its total assets in tobacco bonds subject to a
state’s appropriation pledge, which make payments from both MSA revenue and a state’s appropriation pledge.
In pursuing its investment objective, the Fund may invest in securities of any maturity, but seeks to maintain a dollar-weighted average effective portfolio maturity of 3 to
10 years. Because of events affecting the bond markets and interest rate changes, the maturity of the portfolio might not meet the target at all times. In certain market conditions, however, such a portfolio may be less attractive
because of differences in yield between municipal securities of different maturities due to supply and demand forces, monetary and tax policies and investor expectations. In the event of sustained market conditions that
make it less desirable to maintain a dollar-weighted average portfolio life of 3 to 10 years, the Adviser may change the investment policy of the Fund with respect to the dollar-weighted average life of the portfolio if
approved by the Board.
Decisions to purchase or sell securities are determined by
the relative value considerations of the portfolio managers that factor in economic and
credit-related fundamentals, market supply and demand, market dislocations and situation-specific
opportunities. The purchase or sale of securities may be related to a decision to alter the Fund’s macro risk exposure (such as duration, yield curve positioning and sector exposure), a need to limit or reduce the
Fund’s exposure to a particular security or issuer, degradation of an issuer’s credit quality, or general liquidity needs of the Fund. The potential for realization of capital gains or losses resulting from possible changes in interest
rates will not be a major consideration and frequency of portfolio turnover generally will not be a limiting factor if the Adviser considers it advantageous to purchase or sell securities.