REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Trustees and Shareholders of
Oppenheimer Portfolio Series Fixed Income Investor Fund:

We have audited the accompanying statement of assets and liabilities of
the Oppenheimer Portfolio Series Fixed Income Investor Fund (the
"Fund"), d/b/a Oppenheimer Portfolio Series Fixed Income Active
Allocation Fund, as of November 13, 2007, and the related statement of
operations and the statement of changes in net assets for the period
from August 29, 2007 (date of organization) to November 13, 2007. These
financial statements are the responsibility of the Fund's management.
Our responsibility is to express an opinion on these financial
statements based on our audit.

We conducted our audit in accordance with the standards of the Public
Company Accounting Oversight Board (United States). Those standards
require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. The Fund is not required to have, nor were we engaged to
perform, an audit of its internal control over financial reporting. Our
audit included consideration of internal control over financial
reporting as a basis for designing audit procedures that are
appropriate in the circumstances, but not for the purpose of expressing
an opinion on the effectiveness of the Fund's internal control over
financial reporting. Accordingly, we express no such opinion. An audit
also includes examining, on a test basis, evidence supporting the
amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement
presentation. We believe that our audit provides a reasonable basis for
our opinion.

In our opinion, the financial statements referred to above presents
fairly, in all material respects, the financial position of the Fund as
of November 13, 2007, and the results of their operations and their
changes in net assets for the period from August 29, 2007 (date of
organization) to November 13, 2007, in conformity with accounting
principles generally accepted in the United States of America.



/s/Deloitte & Touche LLP

Denver, Colorado
November 19, 2007