EXHIBIT 11


              (BALLARD SPAHR ANDREWS & INGERSOLL, LLP LETTERHEAD)


                                        February 12, 2003


AIM Investment Funds
11 Greenway Plaza
Suite 100
Houston, TX 77046

                  RE:  Shares of AIM Global Science & Technology Fund

Ladies and Gentlemen:

                  We have acted as counsel to AIM Investment Funds, a Delaware
statutory trust (the "Company"), in connection with that certain Agreement and
Plan of Reorganization (the "Plan") among the Company, on behalf of its series
portfolio, AIM Global Science & Technology Fund ("Global Science"), AIM Funds
Group, a Delaware statutory trust, on behalf of its series portfolio, AIM New
Technology Fund ("New Technology") and A I M Advisors, Inc., a Delaware
corporation.

                  The Plan provides for the reorganization of New Technology
with and into Global Science (the "Reorganization"). Pursuant to the Plan, all
of the assets of New Technology will be transferred to Global Science. Global
Science will assume all of the liabilities of New Technology and the Company
will issue Class A shares of Global Science to New Technology's Class A
shareholders, Class B shares of Global Science to New Technology's Class B
shareholders and Class C shares of Global Science to New Technology's Class C
shareholders. The value of each New Technology shareholder's account with Global
Science after the Reorganization will be the same as the value of such
shareholder's account with New Technology prior to the Reorganization.

                  In connection with our giving this opinion, we have examined
copies of the Company's Certificate of Trust, Amended and Restated Agreement and
Declaration of Trust, as amended (the "Trust Agreement"), and resolutions of the
Board of Trustees adopted February 6, 2003, and originals or copies, certified
or otherwise identified to our satisfaction, of such other documents, records
and other instruments as we have deemed necessary or advisable for purposes of
this opinion. As to various questions of fact material to our opinion, we have
relied upon information provided by officers of the Company.




AIM Investment Funds
February 12, 2003
Page 2


                  The opinion expressed below is based on the assumption that a
Registration Statement on Form N-14 with respect to the Class A, Class B and
Class C shares of Global Science to be issued to the New Technology shareholders
pursuant to the Plan (the "Global Science Shares") will have been filed by the
Company with the Securities and Exchange Commission and will have become
effective before the Reorganization occurs.

                  Based on the foregoing, we are of the opinion that the Global
Science Shares are duly authorized and, when issued by the Company to the
shareholders of New Technology in accordance with the terms and conditions of
the Plan, will be legally issued, fully paid and nonassessable.

                  We express no opinion concerning the laws of any jurisdiction
other than the federal laws of the United States of America and the Delaware
Statutory Trust Act.

                  Both the Delaware Statutory Trust Act and the Trust Agreement
provide that shareholders of the Company shall be entitled to the same
limitation on personal liability as is extended under the Delaware General
Corporation Law to stockholders of private corporations for profit. There is a
remote possibility, however, that, under certain circumstances, shareholders of
a Delaware statutory trust may be held personally liable for that trust's
obligations to the extent that the courts of another state which does not
recognize such limited liability were to apply the laws of such state to a
controversy involving such obligations. The Trust Agreement also provides for
indemnification out of property of a fund for all loss and expense of any
shareholder held personally liable for the obligations of that fund. Therefore,
the risk of any shareholder incurring financial loss beyond his investment due
to shareholder liability is limited to circumstances in which a fund is unable
to meet its obligations and the express limitation of shareholder liabilities is
determined not to be effective.

                  We consent to the filing of this opinion as an Exhibit to the
Company's Registration Statement on Form N-14 and to the references to our firm
under the captions "Synopsis - The Reorganization," "Synopsis - Reasons for the
Reorganization," "Additional Information About the Agreement - Other Terms,"
"Additional Information About the Agreement - Federal Income Tax Consequences"
and "Legal Matters" in such Registration Statement.


                                     Very truly yours,

                                     /s/ Ballard Spahr Andrews & Ingersoll, LLP