particular facility or class of facilities, or a
specific excise tax or other revenue source.
The Fund seeks to maintain a dollar-weighted average effective portfolio maturity of two years or less;
however, it can buy securities that have short, intermediate or long maturities. A substantial percentage of the securities the Fund buys may be “callable,” meaning that the issuer can redeem them before their maturity date. Because
of events affecting the bond markets and interest rate changes, the maturity of the portfolio might not meet that target at all times. The foregoing maturity target is not guaranteed and the portfolio managers may deviate from such
target in their discretion.
The Fund will not invest more than 5% of its total assets in securities that are
rated below investment grade (sometimes referred to as “junk bonds”). The Fund also will not invest more than 15% of its total assets in securities rated below the top three investment grade categories. Each of these restrictions 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, Invesco Advisers, Inc. (Invesco or the 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 these securities to exceed, at times significantly, these restrictions for an extended period of time.
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. Medium- and lower-grade municipal securities are securities rated by S&P or Fitch,
Inc. (Fitch) as BBB+ through D (inclusive) for bonds or SP-2 or lower for notes; by Moody’s as Baa1
through D (inclusive) for bonds or MIG3 or VMIG3 or lower for notes; or unrated municipal securities determined by the Adviser to be of comparable quality, each at the time of purchase. If two or more nationally recognized statistical
rating organizations have assigned different ratings to a security, the Adviser uses the highest rating assigned.
The Fund will not invest more than 5% of its total assets in unrated securities. For
purposes of the limitations described above regarding “unrated securities,” such securities do not include securities that are not rated but that the Fund’s Adviser determines to be comparable to securities of the same issuer that are rated by a
nationally recognized statistical rating organization.
The Fund will not invest more than 15% of its total assets in municipal securities
issued by the government of a single state, its political sub-divisions, or the District of Columbia, U.S. territory, commonwealth or possession, or their agencies, instrumentalities and authorities. Notwithstanding this limitation, the Fund may invest
up to 25% of its total assets in municipal securities issued by each of California, New York, and Texas, or
their respective agencies, instrumentalities and authorities. In addition, the Fund will not invest more than 15% of its total assets in a single sector, as determined by the Adviser. This limitation does not apply to investments in the general obligations
sector.
The Fund can invest in derivative instruments, including
futures contracts. The Fund can use futures contracts, including interest rate futures, to reduce exposure
to interest rate changes and to manage duration.
The Fund may 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.
To the extent the Fund invests in pre-refunded municipal securities collateralized by
U.S. government securities, the Fund may treat those
securities as investment-grade (AAA) securities even if the issuer itself has a below-investment-grade
rating.
The Adviser buys and sells securities for the Fund’s portfolio with a view
towards seeking a high level of interest income exempt from federal income tax and selects securities that
the Adviser believes entail reasonable credit risk considered in relation to the investment policies of the Fund. As a result, the Fund will not necessarily invest in the highest yielding municipal securities permitted by its investment policies
if the Adviser determines that market risks or credit risks associated with such investments would subject
the Fund’s portfolio to undue risk.
Principal Risks of Investing in the Fund
As with any mutual fund investment, loss of money is a risk of investing. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. The risks associated with an investment in the Fund can increase during times of significant market volatility. The
principal risks of investing in the Fund are:
Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and
down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of
the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer, such as real or perceived adverse economic
conditions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability, natural or environmental disasters, widespread disease or other public health
issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally. During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well,
there can be no assurance that specific investments held by the Fund will rise in value.
Debt Securities
Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in
prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund
to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt
instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the
issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a
timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The Adviser’s credit analysis may fail to
anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
Municipal Securities Risk.
The risk of a municipal obligation generally depends on the financial and credit status of the issuer.
Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter
initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security. Failure of a municipal security
issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce
or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
Shorter-Term Securities Risk. Normally, when
interest rates change, the values of shorter-term debt securities change less than the values of securities
with longer maturities. The Fund tries to reduce the volatility of its