Under normal market conditions, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in municipal bonds, the income of which is exempt from federal income taxation. It may count securities that generate income subject to the alternative minimum tax toward the 80% investment requirement.

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AAMBX

The investment seeks to earn the highest level of current income exempt from both federal income tax and State of Arizona personal income tax that is available without assuming what the Adviser considers to be undue risk. The fund principally invests in high-yielding, predominantly investment grade municipal securities. It invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax.

AAZAX

The investment seeks a high level of current income that is exempt from federal income taxes. The fund invests at least 80% of the value of its net assets, plus any borrowings for investment purposes, in investment grade fixed income securities that qualify as tax-exempt municipal obligations. Tax-exempt municipal obligations include municipal obligations that pay interest that is free from U.S. federal income tax. These obligations are issued by states, U.S. territories and their political subdivisions, such as counties, cities and towns.

ABEIX

The investment seeks to earn the highest level of current income, exempt from federal taxation, that is available consistent with what the Adviser considers to be an appropriate level of risk. The fund pursues its objective by investing principally in high-yielding municipal securities of any credit quality that (i) score highly on the Adviser's environmental, social and governance ("ESG") criteria and (ii) are deemed by the Adviser to have an environmental or social impact in underserved or low socio-economic communities. The fund invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax.

ABIMX

The fund will invest at least 80% of its assets in, or derive at least 80% of its income from, securities that are exempt from regular federal income tax. It will not invest in securities that subject the investors to federal alternative minimum tax. It invests at least 65% in debt securities rated A- or better or A3 or better by Nationally Recognized Statistical Rating Organizations designated by the fund's investment adviser, or unrated but determined by the fund's investment adviser to be of equivalent quality.

AFTEX

The investment seeks federal tax-exempt current income.  The fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in municipal debt securities that (1) pay interest that is excluded from gross income for federal income tax purposes, and (2) do not produce income that will be considered to be an item of preference for purposes of the alternative minimum tax. At least 80% of its net assets will normally be invested in investment grade municipal debt securities. The advisor will attempt to maintain a dollar-weighted average effective portfolio maturity of five years or less.

AITFX

The fund invests principally in high-yielding, predominantly investment grade municipal securities. It invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal alternative minimum tax ("AMT") for certain taxpayers.

ALCAX

The fund invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal alternative minimum tax ("AMT") for certain taxpayers. It invests at least 80% of its net assets in municipal securities of New York or municipal securities with interest that is otherwise exempt from New York state income tax.

ALNYX

The investment seeks to earn the highest level of current income, exempt from federal income tax, which is available without assuming what the Adviser considers to be undue risk to principal or income. The fund invests principally in high-yielding, predominantly investment grade municipal securities. It invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal alternative minimum tax ("AMT") for certain taxpayers. The fund may invest more than 25% of its assets in a single state.

ALTHX

The fund invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal AMT for certain taxpayers. It normally invests at least 80% of its net assets in municipal securities of Massachusetts or municipal securities with interest that is otherwise exempt from Massachusetts state income tax.

AMAAX

The fund invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal alternative minimum tax ("AMT") for certain taxpayers. It invests at least 80% of its net assets in municipal securities of New Jersey or municipal securities with interest that is otherwise exempt from New Jersey state income tax.

ANJAX

The fund invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal alternative minimum tax ("AMT") for certain taxpayers. It invests at least 80% of its net assets in municipal securities of Ohio or municipal securities with interest that is otherwise exempt from Ohio state income tax.

AOHAX

The fund invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal alternative minimum tax ("AMT") for certain taxpayers. It invests at least 80% of its net assets in municipal securities of Pennsylvania or municipal securities with interest that is otherwise exempt from Pennsylvania state income tax.

APAAX

The fund invests in a diversified portfolio of municipal bonds and debentures. As a matter of fundamental policy, it invests, under normal circumstances, at least 80% of its net assets in municipal securities, the income from which is both exempt from federal income tax and not subject to federal alternative minimum tax for individuals. The fund invests at least 80% of its net assets in tax-free bonds and maintains a dollar-weighted average maturity between 1 day to 1 year.

APUSX

The fund will invest at least 80% of its assets in, or derive at least 80% of its income from, securities that are exempt from regular federal income tax and that do not subject the investors to federal alternative minimum tax. The fund invests primarily in debt securities rated AA- or better or Aa3 or better, or unrated but determined by the fund's investment adviser to be of equivalent quality. Its aggregate portfolio will have a dollar-weighted average effective maturity no greater than three years.

ASTEX

The investment seeks high after-tax current income consistent with preservation of capital. The fund invests its assets in a combination of tax-exempt obligations and taxable debt obligations. Under normal circumstances, it invests at least 80% of its net assets in tax-exempt obligations. The fund's average portfolio maturity, at the time of investment, will be two years or less. The obligations in which the fund invests must, at the time of investment, be rated investment grade, as determined by the various rating agencies, or if unrated, of comparable quality as determined by the Adviser.

ATOIX

The investment seeks to maximize after-tax return and income. The fund invests, under normal circumstances, at least 80% of its net assets in fixed-income securities. It also invests, under normal circumstances, at least 65% of its total assets in municipal securities that pay interest that is exempt from federal income tax. The fund may also invest in forward commitments, zero-coupon municipal securities and variable, floating and inverse floating-rate municipal securities.

ATTYX

The fund pursues its objective by investing principally in high-quality, predominantly investment-grade, municipal securities that pay interest exempt from federal taxation. It will invest at least 80% of its total assets in fixed-income securities rated A or better or the equivalent by one or more nationally recognized statistical rating organizations. The fund may invest up to 20% of its total assets in below investment grade fixed-income securities (“junk bonds”).

AUNYX

The fund invests at least 80% of its net assets in municipal securities that pay interest that is exempt from federal income tax. These securities may pay interest that is subject to the federal AMT for certain taxpayers. It invests at least 80% of its net assets in municipal securities of Virginia or municipal securities with interest that is otherwise exempt from Virginia state income tax.

AVAAX

Under normal circumstances, at least 80% of the fund's net assets will be invested in municipal obligations that pay interest exempt, in the opinion of bond counsel, from Arizona state and regular Federal income taxes, the income paid upon which will not be subject to the Federal alternative minimum tax on individuals. These obligations can be of any maturity, but the fund's weighted average maturity has traditionally been between 5 and 15 years.

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