June 1, 2010

Board of Trustees

AIM Counselor Series Trust (Invesco Counselor Series Trust), AIM Growth Series (Invesco Growth Series), AIM Investment Funds (Invesco Investment Funds), AIM Investment Securities Funds (Invesco Investment Securities Funds), AIM Sector Funds (Invesco Sector Funds), AIM Tax-Exempt Funds (Invesco Tax-Exempt Funds) and AIM Variable Insurance Funds (Invesco Variable Insurance Funds) (each a “Trust”, collectively the “Trusts”)

11 Greenway Plaza, Suite 100
Houston, Texas 77046-1173

Re: Initial Capital Investment in New Portfolios of each Trust

Ladies and Gentlemen:

The purpose of this letter is to set out our understanding of the conditions of and our promises and representations concerning this investment.

We hereby agree to purchase $10,000.00 worth of shares per share Class listed for the following Funds effective as of the date hereof:

FUND AND CLASS

Initial investment for the purpose of commencing operations- $10,000.00 per share Class, per Fund

AIM Counselor Series Trust (Invesco Counselor Series Trust)

Invesco Balanced Fund

Class Y Shares

Invesco Large Cap Relative Value

Class B Shares

Class C Shares

Invesco Van Kampen Equity and Income Fund

Institutional Class Shares

Invesco Van Kampen Growth and Income Fund

Institutional Class Shares

Invesco Van Kampen Pennslyvania Tax Free Income Fund

Class Y Shares

AIM Growth Series (Invesco Growth Series)

Invesco Van Kampen Harbor Fund

Institutional Class Shares

Invesco Van Kampen Real Estate Securities Fund

Institutional Class Shares

Invesco Van Kampen U.S. Mortgage Fund

Institutional Class Shares

June 1, 2010
Page 2

AIM Investment Funds (Invesco Investment Funds)

Invesco Alternative Opportunities Fund

Institutional Class Shares

Invesco Commodities Strategy Fund

Institutional Class Shares

Invesco FX Alpha Plus Strategy Fund

Institutional Class Shares

Invesco FX Alpha Strategy Fund

Institutional Class Shares

Invesco International Growth Equity Fund

Class B Shares

Class C Shares

Invesco Van Kampen Emerging Markets Fund

Institutional Class Shares

Invesco Van Kampen Global Equity Allocation Fund

Class Y Shares

Invesco Van Kampen Global Tactical Asset Allocation Fund

Institutional Class Shares

Invesco Van Kampen International Growth Fund

Institutional Class Shares

AIM Investment Securities Funds (Invesco Investment Securities Funds)

Invesco Van Kampen Corporate Bond Fund

Institutional Class Shares

Invesco Van Kampen Government Securities Fund

Class Y Shares

Institutional Class Shares

Invesco Van Kampen High Yield Fund

Institutional Class Shares

Invesco Van Kampen Limited Duration Fund

Class Y Shares

Institutional Class Shares

AIM Sector Funds (Invesco Sector Funds)

Invesco U.S. Mid Cap Value Fund

Class B Shares

Class C Shares

Invesco U.S. Small Cap Value Fund

Class B Shares

Class C Shares

Invesco U.S. Small/Mid Cap Value Fund

Class B Shares

Class C Shares

Invesco Value II Fund

Class B Shares

Class C Shares

June 1, 2010
Page 3

AIM Sector Funds (Invesco Sector Funds) — continued

Invesco Van Kampen American Value Fund

Institutional Class Shares

Invesco Van Kampen Capital Growth Fund

Institutional Class Shares

Invesco Van Kampen Comstock Fund

Institutional Class Shares

Invesco Van Kampen Mid Cap Growth Fund

Institutional Class Shares

Invesco Van Kampen Technology Fund

Class Y Shares

AIM Tax-Exempt Funds (Invesco Tax-Exempt Funds)

Invesco Municipal Fund

Class B Shares

Class C Shares

Invesco Van Kampen New York Tax Free Income Fund

Class Y Shares

AIM Variable Insurance Funds (Invesco Variable Insurance Funds)

Invesco Van Kampen V.I. Mid Cap Growth Fund

Series I Shares

Invesco Van Kampen V.I. Equity and Income Fund

Series I Shares

Invesco Van Kampen V.I. Global Value Equity Fund

Series II Shares

Invesco Van Kampen V.I. High Yield Fund

Series II Shares

Invesco Van Kampen V.I. International Growth Equity Fund

Series I Shares

Invesco Van Kampen V.I. Value Fund

Series II Shares

We understand that the initial net asset value per share for each portfolio named above will be established as follows:

• Class Y NAV will be based on Institutional Class NAV of merging fund, as Institutional Class shares of Van Kampen and Morgan Stanley Funds are merging into Class Y

• Invesco Institutional class NAV will be based on Class Y NAV, after Class Y NAV has been established based on merging assets

• Class B share NAV will be based on Class A NAV

• Class C share NAV will be based on Class A NAV

• Series I NAV will be based on Series II NAV

• Series II NAV will be based on Series I NAV

We hereby represent that we are purchasing these shares solely for our own account and solely for investment purposes without any intent of distributing or reselling said shares. We further represent that disposition of said shares will only be by direct redemption to or repurchase by the Trusts.

June 1, 2010
Page 4

We further agree to provide the Trusts with at least three business day’s advance written notice of any intended redemption and agree that we will work with the Trusts with respect to the amount of such redemption so as not to place a burden on the Trusts and to facilitate normal portfolio management of the Funds.

Sincerely yours,

INVESCO ADVISERS, INC.

/s/ John M. Zerr

John M. Zerr

Senior Vice President

cc: Mark Gregson
Gary Trappe