Oppenheimer Municipal Fund NCSRS Certified semi-annual shareholder report (management investment company)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-21881

Oppenheimer Rochester Minnesota Municipal Fund

(Exact name of registrant as specified in charter)

6803 South Tucson Way, Centennial, Colorado 80112-3924

(Address of principal executive offices) (Zip code)

Arthur S. Gabinet

OFI Global Asset Management, Inc.

Two World Financial Center, New York, New York 10281-1008

(Name and address of agent for service)

Registrant’s telephone number, including area code: (303) 768-3200

Date of fiscal year end: March 31

Date of reporting period: 9/30/2013

Item 1. Reports to Stockholders.

LOGO


Table of Contents
Fund Performance Discussion			3

Top Holdings and Allocations			10

Fund Expenses			14

Statement of Investments			16

Statement of Assets and Liabilities			27

Statement of Operations			29

Statements of Changes in Net Assets			30

Statement of Cash Flows			31

Financial Highlights			32

Notes to Financial Statements			39

Board Approval of the Fund’s Investment Advisory Agreement			57

Special Shareholder Meeting			60

Portfolio Proxy Voting Policies and Procedures; Updates to Statement of Investments			62

Trustees and Officers			63

Privacy Policy Notice			64

Class A Shares

AVERAGE ANNUAL TOTAL RETURNS AT 9/30/13


	Class A Shares of the Fund
	Without Sales Charge	With Sales Charge	Barclays Municipal Bond Index

6-Month	-5.65%	-10.13%	-3.15%

1-Year	-4.09	-8.64	-2.21

5-Year	6.52	5.49	5.98

Since Inception (11/7/06)	3.38	2.66	4.42

Performance data quoted represents past performance, which does not guarantee future results. The investment return and principal value of an investment in the Fund will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Fund returns include changes in share price, reinvested distributions, and a 4.75% maximum applicable sales charge except where “without sales charge” is indicated. Current performance may be lower or higher than the performance quoted. Returns do not consider capital gains or income taxes on an individual’s investment. Returns for periods of less than one year are cumulative and not annualized. For performance data current to the most recent month-end, visit oppenheimerfunds.com or call 1.800.CALL OPP (225.5677).

OppenheimerFunds/Rochester is using social media to provide timely information related to muni market developments at www.twitter.com/RochesterFunds.

2 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

Fund Performance Discussion

During a reporting period characterized by rising yields, this Fund produced a tax-free distribution yield of 4.05% at net asset value (NAV), outperforming the average in its Lipper category. Investor confidence weakened in the aftermath of the Federal Reserve’s June testimony about the potential for future adjustments to its $85 billion-a-month purchasing initiative. As a result, net asset values in the industry and in this Fund dropped sharply, and total returns followed suit. For the reporting period ended September 30, 2013, the 6-month total return was -5.65% (without sales charge).

MARKET OVERVIEW

Despite the sluggishness of the U.S. economy throughout this reporting period, many investors grew increasingly concerned about the potential impact of any change to the Federal Reserve’s policy of quantitative easing.

In June, for example, the Fed announced that it was “prepared to increase or reduce the pace of its purchases” and that the short-term Fed Funds target rate, which it controls, would remain between zero and 0.25%. The market reaction was a sharp sell-off by fixed-income investors, many of whom believed that a policy change was imminent.

By the time Fed Chairman Ben S. Bernanke and other Fed officials tried to correct the market’s interpretation of what had been communicated, prices of municipal bonds had fallen and bond fund outflows worsened. As a result, yields rose, effectively turning the investors’ fears about future interest rates into a reality. Investors who were able to ride out the price volatility and focus on the long term were able to buy bonds with higher yields.

Given the current Fed Funds rate, the only plausible change would be an increase. We remind investors that a change in the Fed Funds rate does not automatically translate into a change in longer-term interest rates,



YIELDS & DISTRIBUTIONS FOR CLASS A SHARES

Dividend Yield w/o sales charge		4.05	%

Dividend Yield with sales charge		3.86

Standardized Yield		3.82

Taxable Equivalent Yield		7.32

Last distribution (9/24/13)	$	0.041

Total distributions (4/1/13 to 9/30/13)	$	0.241

Endnotes for this discussion begin on page 11 of this report

3 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

which are determined by the marketplace. Additionally, the Fund’s investment team believes that its focus on finding value in the marketplace and producing competitive levels of tax-free income is well suited for the market conditions that existed at the end of this reporting period.

AAA-rated municipal securities remained “cheap to Treasuries” for virtually all of this reporting period, a condition that exists when nominal, pre-tax muni yields exceed available Treasury yields. This condition allows investors to earn higher nominal yields on their muni holdings than on Treasuries and to benefit further from the federal, state and, where applicable, local tax exemptions on municipal investment income.

As of September 30, 2013, the average yield on 30-year, AAA-rated muni bonds was 4.26%, up 107 basis points from March 28, 2013, the last business day of the Fund’s 2012 fiscal year. On September 30, 2013, the average yield on 10-year, AAA-rated muni bonds was 2.70%, up 74 basis points from the March 2013 date, and the average yield on 1-year, AAA-rated muni bonds was 0.30%, up 10 basis points from the March 2013 date.

The potential for tapering and changes to the Fed Funds rate were not the only topics emanating from Washington, D.C., at the end of this reporting period. The executive and legislative branches were enmeshed in a partisan debate over the federal budget and, as the

reporting period ended, a shutdown of the federal government began.

Additionally, speculation about who would succeed Fed Chairman Ben S. Bernanke was widespread. Many news reports sought to discern how policies might change under new leadership. While Lawrence Summers was seen as the early, front runner, he withdrew from consideration in mid-September. Janet Yellen became the front runner thereafter.

The average distribution yield at NAV in Lipper’s Minnesota Municipal Debt Funds category was 3.29% at the end of this reporting period. At 4.05%, the distribution yield at NAV for this Fund’s Class A shares was 76 basis points higher than the category average.

In May 2013, Minnesota legislative leaders announced a budget deal that is expected to generate $2 billion in new tax revenue. This deal came in response to a projected $627 million deficit in the revised $38 billion, 2-year budget proposed by Governor Mark Dayton for fiscal 2014-2015. The budget agreement boosts education spending by $725 million, and includes $400 million in property tax breaks. The plan also includes a temporary income tax surcharge on the state’s highest earners, which will be used to help repay $860 million owed to public schools and, according to the governor and Democratic leaders, will break the cycle of back-to-back budget deficits.

4 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

In August 2013, the state sold more than $450 million of high-grade General Obligation (G.O.) bonds that traders say look “rich,” according to The Bond Buyer. Next on the agenda are plans to sell up to $600 million of general fund appropriation bonds, which will help repay the public’s $500 million share of borrowing for the new $975 million stadium for the Vikings; revenues from the state’s electronic bingo games are also part of the repayment plan.

Also in August, Minnesota Municipal Power came to market with $20 million in tax-exempt electric revenue bonds to help finance the Hometown BioEnergy project, a biomass generating station also backed by a $9 million federal grant.

At the end of this reporting period, Minnesota’s G.O. debt was rated Aa1 by Moody’s Investors Service and AA-plus by Standard & Poor’s and Fitch Ratings.

Elsewhere in the country, in a move that was widely anticipated, Detroit filed for bankruptcy. This was just the latest development for the 18th largest U.S. city, which has had well-documented fiscal problems for nearly a decade.

It is important to note that not all issues that include the word “Detroit” are affected by the city’s bankruptcy filing. Further, it often takes years for a municipality to emerge

from bankruptcy; it is way too early for anyone to know with any degree of certainty how different creditors will be treated, and any long-term implications of Detroit’s filing will depend on how the bankruptcy judge ultimately rules.

The Rochester team has been monitoring the fiscal conditions in the Motor City for years and will continue to do so. Media coverage about Detroit’s filing and about Puerto Rico debt contributed to market volatility in the latter half of this reporting period.

As often happens, the muni market responded more quickly to “negative” news than to “positive” news this reporting period. Successful investors, we have found, maintain a long-term perspective regardless of the specific developments associated with any given reporting period. To maximize the benefits that municipal bond funds seek to provide, many investors reinvest their dividends and allow the income generated from their investments to compound over time.

FUND PERFORMANCE

Oppenheimer Rochester Minnesota Municipal Fund held more than 275 securities as of September 30, 2013. The Fund was invested in a broad range of sectors, providing shareholders with a diversity of holdings that we believe would be difficult and costly to replicate in an individual portfolio.

5 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

LOGO

The Class A distribution yield of 4.05% at net asset value as of September 30, 2013, was 76 basis points higher than the average in Lipper’s Minnesota Municipal Debt Funds category, which was 3.29%. Additionally, for a taxable investment to have provided a greater benefit than an investment in this Fund, it would have had to yield more than 7.32%, based on the Fund’s standardized yield as of September 30, 2013, and the current federal and Minnesota income tax rates.

Refundings were a common occurrence during this reporting period and led to increased dividend pressure throughout the muni bond fund industry. In refundings, municipal issuers seek to reduce their debt service obligations by exercising the call feature on their higher coupon bonds and then borrowing at lower interest rates.

During this reporting period, these types of transactions made it difficult for the Fund to replace the called bonds with bonds that had equally attractive yields.

Refundings tend to become less popular in higher-rate environments, as the savings on debt service payments may not be sufficient to justify the process’s costs. However, when interest rates are low, as they were for most of this reporting period, refundings generally put dividends of longer-term funds under pressure.

Despite the market conditions, the dividend of the Fund increased to 4.1 cents per Class A share beginning with the September 2013 payout, from 4.0 cents per Class A share at the outset of the reporting period.

6 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

LOGO

In all, the Fund distributed 24.1 cents per share this reporting period.

The Fund’s investments in the multifamily housing sector represented 18.3% of the Fund’s total assets at the end of this reporting period. These securities continued to provide competitive levels of tax-free income, despite the difficult conditions in the national housing market this reporting period. We continue to believe that long-term investors should ultimately benefit from this Fund’s carefully selected holdings in the housing sector.

As of September 30, 2013, the Fund was invested in the hospital/healthcare sector, comprising 17.7% of its total assets. Our holdings in this sector consist of securities

across the credit spectrum. This sector (among others) was affected by “credit spread widening,” which occurs when the difference between yields on low-rated municipal bonds and higher-rated bonds increases. When spreads become wider, prices of high-grade muni bonds generally perform better than those of lower-rated bonds.

The adult living facilities sector represented 14.4% of the Fund’s total assets at the end of this reporting period. We continue to believe that attractive opportunities – whether in adult living facilities in densely populated geographies with strengthening real estate values or facilities in more rural areas with stable home values – can be identified in this sector.

7 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

Tax increment financing (TIF) bonds constituted 11.4% of the Fund’s total assets at the end of the reporting period. Traditionally, this type of financing has been used for urban renewal projects. Increased tax collections as a result of inflation or an improving economy typically prove favorable for these types of bonds.

The Fund continued to favor the education sector this reporting period, which represented 9.1% of the Fund’s total assets. In addition, the higher education sector represented 6.5% of the Fund’s total assets. The investment-grade bonds we hold in these sectors have regularly provided high levels of tax-free income with what we believe to be far less credit risk that their external ratings would suggest.

During this reporting period, the Fund was invested in municipal inverse-floating rate securities, which are tax-exempt securities with interest payments that move inversely to changes in short-term interest rates. “Inverse floaters” generally offer higher tax-free yields than fixed-rate bonds of comparable maturity and credit quality, but they face greater price volatility, too. In a low-interest-rate environment, a fund’s investments in “inverse floaters” can help enhance a fund’s yield. Investors should note that rising rates in the short-term market serve to reduce the income that “inverse floaters” provide industry-wide. We continue to believe that “inverse floaters” are an essential element of this Fund’s portfolio because of the attractive yields they can

produce under certain market conditions. As is its penchant, the Rochester-based investment team will continue to monitor and make adjustments to its portfolios that it believes can provide the greatest benefit to Fund shareholders.

Our approach to municipal bond investing is flexible and responsive to market conditions. Shareholders should note that market conditions during this reporting period did not affect the Fund’s overall investment objectives or cause it to pay any capital gain distributions. In closing, we believe that our time-tested strategies and the Fund’s structure and sector composition will continue to benefit fixed-income investors through interest rate and economic cycles.

Our approach to municipal bond investing is flexible and responsive to market conditions.

INVESTMENT STRATEGY

The Rochester investment team focuses exclusively on municipal bonds and has consistently used a time-tested, value-oriented and security-specific approach to fund management. We know that market conditions can and do fluctuate, but we do not waver in our belief in the power of tax-free yield to help investors achieve their long-term objectives.

The Fund invests primarily in investment-grade municipal securities and may invest up to 25% of its total assets in below-investment

8 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

grade securities, or “junk” bonds; the percentage of assets is measured at the time of purchase and the credit quality of the securities is based on Nationally Recognized Statistical Rating Organization (“NRSRO”) ratings or, if no NRSRO rating, on internal ratings. As of September 30, 2013, market movements or rating changes of municipal bonds caused the Fund’s below-investment-grade holdings to exceed this threshold. As a result, no further purchases of below-investment-grade bonds will be made until the Fund’s holdings of these types of bonds is once again below 25% of total assets.

Our team continually searches for under-valued bonds that we believe will provide a meaningful level of tax-free income until maturity. Rather than making allocation shifts based on expected market conditions, we search the marketplace for what we believe to be the best values for generating income. It remains important to note that we do not manage our funds based on predictions of interest rate changes.

Instead, our investment approach involves scouring the market for municipal securities that meet our stringent credit criteria and buying bonds that we believe will help

our funds deliver above-average yields (relative to peer funds). We focus on identifying inefficiencies in market pricing that can lead to investment advantages. We seek to maintain a thoughtful mix of industry sectors, maturities and credit ratings in this Fund’s portfolio.

The Rochester Way, we believe, distinguishes our approach to municipal investing from those of our competitors.

Daniel G. Loughran,

Senior Vice President, Senior Portfolio Manager and Team Leader, on behalf of the rest of the Rochester portfolio management team: Scott S. Cottier, Troy E. Willis, Mark R. DeMitry, Michael L. Camarella, Charles S. Pulire and Elizabeth S. Mossow.

9 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

Top Holdings and Allocations

TOP TEN CATEGORIES


Multifamily Housing			18.3%
Hospital/Healthcare			17.7
Adult Living Facilities			14.4
Tax Increment Financing (TIF)			11.4
Education			9.1
Higher Education			6.5
Marine/Aviation Facilities			5.2
Electric Utilities			4.9
Municipal Leases			2.3
General Obligation			1.7

Portfolio holdings and allocations are subject to change. Percentages are as of September 30, 2013, and are based on total assets.

CREDIT ALLOCATION


	NRSRO- Rated		Sub- Adviser- Rated		Total
AAA		0.9%		0.2%		1.1%
AA		23.9		0.0		23.9
A		17.6		0.0		17.6
BBB		15.1		16.4		31.5
BB or lower		3.5		22.4		25.9
Total		61.0%		39.0%		100.0%

The percentages above are based on the market value of the securities as of September 30, 2013, and are subject to change. OppenheimerFunds, Inc. determines the credit allocation of the Fund’s assets using ratings by nationally recognized statistical rating organizations (NRSROs), such as Standard & Poor’s. For any security rated by an NRSRO other than S&P, the sub-adviser, OppenheimerFunds, Inc., converts that security’s rating to the equivalent S&P rating. If two or more NRSROs have assigned a rating to a security, the highest rating is used. For securities not rated by an NRSRO, the sub-adviser uses its own credit analysis to assign ratings in categories similar to those of S&P. The use of similar categories is not an indication that the sub-adviser’s credit analysis process is consistent, or comparable with any NRSRO’s process were that NRSRO to rate the same security.

For the purposes of this Credit Allocation table, securities rated within the NRSROs’ four highest categories—AAA, AA, A and BBB—are investment-grade securities. For further details, please consult the Fund’s prospectus or Statement of Additional Information.

10 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

Performance

DISTRIBUTION YIELDS

As of 9/30/13


	Without Sales Charge	With Sales Charge
Class A	4.05%	3.86%
Class B	3.37	N/A
Class C	3.38	N/A
Class Y	4.18	N/A

STANDARDIZED YIELDS

For the 30 Days Ended 9/30/13


Class A	3.82	%
Class B	3.27
Class C	3.27
Class Y	4.09

TAXABLE EQUIVALENT YIELDS

As of 9/30/13


Class A	7.32	%
Class B	6.26
Class C	6.26
Class Y	7.84

AVERAGE ANNUAL TOTAL RETURNS WITHOUT SALES CHARGE AS OF 9/30/13


	Inception Date		6-Month			1-Year			5-Year			Since Inception
Class A (OPAMX)		11/7/06		-5.65	%		-4.09	%		6.52	%		3.38	%
Class B (OPBMX)		11/7/06		-5.94			-4.81			5.73			2.71
Class C (OPCMX)		11/7/06		-5.94			-4.74			5.72			2.59
Class Y (OPYMX)		7/29/11		-5.59			-4.00			N/A			5.38

AVERAGE ANNUAL TOTAL RETURNS WITH SALES CHARGE AS OF 9/30/13


	Inception Date		6-Month			1-Year			5-Year			Since Inception
Class A (OPAMX)		11/7/06		-10.13	%		-8.64	%		5.49	%		2.66	%
Class B (OPBMX)		11/7/06		-10.57			-9.42			5.41			2.71
Class C (OPCMX)		11/7/06		-6.87			-5.66			5.72			2.59
Class Y (OPYMX)		7/29/11		-5.59			-4.00			N/A			5.38

Performance data quoted represents past performance, which does not guarantee future results. The investment return and principal value of an investment in the Fund will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Returns do not consider capital gains or income taxes on an individual’s investments. Returns for periods of less than one year are cumulative and not annualized. For performance data current to the most recent month-end, visit oppenheimerfunds.com or call 1.800.CALL OPP (225.5677). Fund returns include changes in share price, reinvested distributions, and the applicable sales charge: for Class A shares, the current maximum initial sales charge of 4.75%; for Class B shares, the contingent deferred sales charge of 5% (1-year) and 2% (5-year); and for Class C, the contingent deferred sales charge of 1% for the 1-year period. There is no sales charge for Class Y shares.

11 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

The Fund’s performance is compared to the performance of the Barclays Municipal Bond Index, an unmanaged index of a broad range of investment-grade municipal bonds that is a measure of the general municipal bond market. Indices are unmanaged and cannot be purchased by investors. Index performance includes reinvestment of income, but does not reflect transaction costs, fees, expenses or taxes. Index performance is shown for illustrative purposes only as a benchmark for the Fund’s performance, and does not predict or depict performance of the Fund. The Fund’s performance reflects the effects of the Fund’s business and operating expenses.

Distribution yields for Class A shares are based on dividends of $0.041 for the 28-day accrual period ended September 24, 2013. The yield without sales charge for Class A shares is calculated by dividing annualized dividends by the Class A net asset value on September 24, 2013; for the yield with sales charge, the denominator is the Class A maximum offering price on that date. Distribution yields for Class B, C and Y are annualized based on dividends of $0.0340, $0.0341 and $0.0423, respectively, for the 28-day accrual period ended September 24, 2013, and on the corresponding net asset values on that date.

Standardized yield is based on the Fund’s net investment income for the 30-day period ended September 30, 2013, and either that date’s maximum offering price (for Class A shares) or net asset value (for the other classes). Each result is compounded semiannually and annualized. Falling share prices artificially increase yields.

The average distribution yield in this Fund’s Lipper category was calculated based on the distributions and the final net asset values (NAVs) of the reporting period for the funds in each category. The average yield at NAV in Lipper’s Minnesota Municipal Debt Funds category is based on 44 NAVs, one for each class of each fund in the category; a fund can have up to 4 classes. Lipper yields do not include sales charges—which, if included, would reduce results.

Taxable equivalent yield is based on the standardized yield and the 2013 combined federal and Minnesota tax rate of 47.8%. Calculations factor in the 3.8% tax on unearned income under the Patient Protection and Affordable Care Act, as applicable. A portion of the Fund’s distributions may be subject to tax; distributions may also increase an investor’s exposure to the alternative minimum tax. Capital gains distributions are taxable as capital gains. Tax treatments of the Fund’s distributions and capital gains may vary by state; investors should consult a tax advisor to determine if the Fund is appropriate for them. Each result is compounded semiannually and annualized. Falling share prices artificially increase yields. This Report must be preceded or accompanied by a Fund prospectus.

The average yields for AAA-rated municipal securities are provided by Municipal Market Advisors (MMA) and are based on its benchmark of general obligation bonds structured with a 5% coupon. The MMA 5% benchmark is constructed using yields from the leading underwriters, who represent a significant percentage of the primary activity of the top 10 underwriters and therefore the total issuance. The benchmark that was used in shareholder reports before December 31, 2012, was based on par coupon yields and included a broader set of participants; the 5% benchmark is now considered the industry standard.

12 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

The Fund’s investment strategy and focus can change over time. The mention of specific fund holdings does not constitute a recommendation by OppenheimerFunds, Inc. or its affiliates.

Before investing in any of the Oppenheimer funds, investors should carefully consider a fund’s investment objectives, risks, charges and expenses. Fund prospectuses and summary prospectuses contain this and other information about the funds, and may be obtained by asking your financial advisor, visiting oppenheimerfunds.com, or calling 1.800.CALL OPP (225.5677). Read prospectuses and summary prospectuses carefully before investing.

Shares of Oppenheimer funds are not deposits or obligations of any bank, are not guaranteed by any bank, are not insured by the FDIC or any other agency and involve investment risks, including the possible loss of the principal amount invested.

13 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

Fund Expenses

Fund Expenses. As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, which may include sales charges (loads) on purchase payments, contingent deferred sales charges on redemptions; and (2) ongoing costs, including management fees; distribution and service fees; and other Fund expenses. These examples are intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The examples are based on an investment of $1,000.00 invested at the beginning of the period and held for the entire 6-month period ended September 30, 2013.

Actual Expenses. The first section of the table provides information about actual account values and actual expenses. You may use the information in this section for the class of shares you hold, together with the amount you invested, to estimate the expense that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600.00 account value divided by $1,000.00 = 8.60), then multiply the result by the number in the first section under the heading entitled “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes. The second section of the table provides information about hypothetical account values and hypothetical expenses based on the Fund’s actual expense ratio for each class of shares, and an assumed rate of return of 5% per year for each class before expenses, which is not the actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example for the class of shares you hold with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as front-end or contingent deferred sales charges (loads), or a $12.00 fee imposed annually on accounts valued at less than $500.00 (subject to exceptions described in the Statement of Additional Information). Therefore, the “hypothetical” section of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

14 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND


Actual	Beginning Account Value April 1, 2013		Ending Account Value September 30, 2013	Expenses Paid During 6 Months Ended September 30, 2013
Class A	$ 1,000.00		$ 943.50	$ 4.49
Class B	1,000.00		940.60	8.16
Class C	1,000.00		940.60	8.16
Class Y	1,000.00		944.10	4.05

Hypothetical (5% return before expenses)
Class A	1,000.00		1,020.46	4.67
Class B	1,000.00		1,016.70	8.48
Class C	1,000.00		1,016.70	8.48
Class Y	1,000.00	��	1,020.91	4.21

Expenses are equal to the Fund’s annualized expense ratio for that class, multiplied by the average account value over the period, multiplied by 183/365 (to reflect the one-half year period). Those annualized expense ratios, excluding indirect expenses from affiliated funds, based on the 6-month period ended September 30, 2013 are as follows:


Class	Expense Ratios
Class A		0.92	%
Class B		1.67
Class C		1.67
Class Y		0.83

The expense ratios reflect voluntary waivers and/or reimbursements of expenses by the Fund’s Manager. Some of these undertakings may be modified or terminated at any time, as indicated in the Fund’s prospectus. The “Financial Highlights” tables in the Fund’s financial statements, included in this report, also show the gross expense ratios, without such waivers or reimbursements and reduction to custodian expenses, if applicable.

15 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENT OF INVESTMENTS September 30, 2013 / Unaudited


Principal Amount			Coupon			Maturity		Value

	Municipal Bonds and Notes—111.1%
	Minnesota—108.2%
	$ 120,000	Aitkin, MN Health Care Facilities (Riverwood Healthcare Center)		5.600	%		02/01/2032	$	120,026

	1,000,000	Anoka County, MN Charter School¹		5.000			06/01/2043		849,910

	300,000	Anoka County, MN Charter School¹		5.000			06/01/2032		274,746

	290,000	Anoka County, MN Charter School¹		5.000			06/01/2027		280,500

	25,000	Anoka County, MN Hsg. & Redevel. Authority (Premier FMC)		6.625			05/01/2030		25,756

	1,000,000	Anoka County, MN Hsg. & Redevel. Authority (Woodland Park Apts.)¹		5.000			04/01/2027		1,037,700

	500,000	Anoka, MN Health Care Facility (Homestead Anoka)		7.000			11/01/2046		478,330

	250,000	Apple Valley, MN Hsg. & Health Care (Seasons at Apple Valley)		6.750			03/01/2040		251,530

	25,000	Austin, MN GO¹		5.000			10/01/2018		25,055

	750,000	Austin, MN Hsg. & Redevel. Authority (Chauncey & Courtyard Apts.)¹		5.000			01/01/2031		783,360

	850,000	Austin, MN Hsg. & Redevel. Authority (St. Marks Lutheran Home)		7.000			12/01/2046		864,314

	250,000	Baytown, MN Township (Friends of St. Croix Preparatory Academy/St. Croix Preparatory Academy		5.750			08/01/2042		225,092

	430,000	Baytown, MN Township (St. Croix Preparatory Academy)¹		7.000			08/01/2038		442,152

	85,000	Blue Earth County, MN Economic Devel. Authority¹		5.000			12/01/2027		88,467

	75,000	Brainerd, MN Hsg. & Redevel. Authority, Series A¹		5.000			02/01/2022		75,106

	20,000	Brainerd, MN Hsg. & Redevel. Authority, Series A¹		5.000			02/01/2019		20,041

	150,000	Breckenridge, MN (Catholic Health Initiatives)¹		5.000			05/01/2030		150,462

	1,025,000	Buffalo, MN Health Care (Central Minnesota Senior Hsg.)		5.375			09/01/2026		1,018,358

	1,500,000	Central Minnesota Muni Power Agency (Brookings-Southeast Twin Cities Transmissions)		5.000			01/01/2042		1,529,355

	1,150,000	Central Minnesota Muni Power Agency (Brookings-Southeast Twin Cities Transmissions)		5.000			01/01/2032		1,206,982

	1,500,000	Chicago, MN Hsg. & Healthcare (CDL Homes)		6.000			08/01/2043		1,435,755

	1,100,000	Chippewa County, MN Gross Revenue (Montevideo Hospital)		5.500			03/01/2037		1,100,627

	240,000	Cloquet, MN Pollution Control (Potlach Corp.)¹		5.900			10/01/2026		239,981

	200,000	Cokato, MN Senior Hsg. (Cokato Charitable Trust)		5.250			12/01/2026		200,516

	1,000,000	Columbia Heights, MN EDA Tax Increment (Huset Park Area Redevel.)		5.375			02/15/2032		814,660

	224,000	Columbia Heights, MN EDA Tax Increment (Huset Park Area Redevel.)		5.000			02/15/2017		222,889

	1,400,000	Columbia Heights, MN Multifamily & Health Care Facilities (Crest View Corp.)		5.700			07/01/2042		1,021,034

	25,000	Columbia Heights, MN Multifamily & Health Care Facilities (Crest View Corp.)		5.300			07/01/2017		24,099

	750,000	Cottage Grove, MN Senior Hsg.		5.250			12/01/2046		670,365

	50,000	Cromwell, MN Independent Schoool District No. 95		4.500			02/01/2014		50,168

	180,000	Crookston, MN Nursing Home & Multifamily Hsg. (Villa St. Vincent)		6.625			09/01/2024		180,067

16 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 3,565,000	Dakota County, MN Community Devel. Agency (Grande Market Place)¹		5.350	%		05/20/2034	$	3,566,889

	50,000	Dakota County, MN Community Devel. Agency (Grande Market Place)¹		5.400			11/20/2043		50,007

	100,000	Dakota County, MN Community Devel. Agency (Southfork Apts.)¹		5.625			02/01/2026		100,014

	50,000	Dakota County, MN Community Devel. Agency (Southfork Apts.)¹		5.400			08/01/2018		50,113

	4,555,000	Dakota County, MN Community Devel. Agency (Southfork Apts.)¹		5.650			02/01/2031		4,685,501

	1,000,000	Deephaven, MN Charter School (Eagle Ridge Academy)		5.500			07/01/2043		919,270

	5,000	Douglas County, MN Alexandria Hsg. & Redevel. Authority (Windmill Ponds)		2.810			07/01/2015		4,895

	500,000	Duluth, MN EDA Health Care Facilities (St. Luke’s Hospital)		6.000			06/15/2039		498,000

	1,460,000	Duluth, MN Hsg. & Redevel. Authority (Benedictine Health Center)		5.875			11/01/2033		1,446,334

	500,000	Duluth, MN Hsg. & Redevel. Authority (Public Schools Academy)¹		5.875			11/01/2040		487,085

	785,000	Duluth, MN Independent School District No. 709 COP		5.125			03/01/2029		733,716

	1,315,000	Duluth, MN Independent School District No. 709 COP		5.250			03/01/2032		1,220,162

	300,000	Duluth, MN Independent School District No. 709 COP		5.000			03/01/2025		293,367

	725,000	Duluth, MN Independent School District No. 709 COP		5.000			03/01/2027		688,685

	100,000	East Central, MN Independent School District No. 2580¹		5.000			02/01/2022		100,391

	500,000	Eveleth, MN Health Care (Arrowhead Senior Living Community)		5.200			10/01/2027		460,865

	1,270,000	Eveleth, MN Multifamily (Manor House Woodland)		5.700			10/01/2036		975,830

	1,150,000	Falcon Heights, MN (Kaleidoscope Charter School)		6.000			11/01/2037		1,101,964

	400,000	Fergus Falls, MN Health Care Facilities (Lake Region Healthcare)¹		5.400			08/01/2040		392,740

	280,000	Glencoe, MN Healthcare Facilities (Glencoe Regional Health Services)		4.000			04/01/2031		251,681

	110,000	Grand Rapids, MN Hsg. and Redevel. Authority (Lakeshore)^1,2		5.700			10/01/2029		107,631

	330,000	Grand Rapids, MN Hsg. and Redevel. Authority (Lakeshore)^1,2		5.200			10/01/2019		331,109

	385,000	Hopkins, MN Hsg. & Redevel. Authority (Excelsior Crossings)		5.625			02/01/2030		392,993

	400,000	Hutchinson, MN Public Utility		5.000			12/01/2025		446,360

	300,000	Hutchinson, MN Public Utility		5.000			12/01/2022		346,320

	110,000	International Falls, MN Pollution Control (Boise Cascade Corp.)¹		5.500			04/01/2023		108,640

	180,000	International Falls, MN Pollution Control (Boise Cascade Corp.)		5.650			12/01/2022		179,730

17 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENT OF INVESTMENTS Unaudited / Continued


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 115,000	International Falls, MN Solid Waste Disposal (Boise Cascade Corp.)¹		6.850	%		12/01/2029	$	115,114

	525,000	Lake Crystal, MN Hsg. (Ecumen-Second Century)		6.250			09/01/2040		543,112

	1,100,000	Lake Crystal, MN Hsg. (Ecumen-Second Century)		5.700			09/01/2036		1,102,618

	500,000	Lamberton, MN Solid Waste (Highwater Ethanol)		8.500			12/01/2022		361,590

	250,000	Little Canada, MN Senior Hsg. (PHS/Mayfield)		6.000			12/01/2030		252,552

	630,000	Maple Grove, MN Health Care Facilities (North Care)¹		5.000			09/01/2029		625,533

	335,000	Maple Grove, MN Health Care Facilities (North Memorial Health Care)¹		5.000			09/01/2035		323,101

	285,000	Maple Grove, MN Health Care Systems (Maple Grove Hospital Corp.)¹		5.250			05/01/2037		284,413

	500,000	Maplewood, MN Health Care Facility (VOA Care Centers)		5.375			10/01/2024		460,330

	490,000	Maplewood, MN Hsg. & Health Care (Ecumen Headquarters)		6.375			03/01/2040		504,656

	720,000	Meeker County, MN (Memorial Hospital)		5.750			11/01/2037		726,077

	495,000	Meeker County, MN (Memorial Hospital)		5.750			11/01/2027		506,801

	35,000	Minneapolis & St. Paul, MN Hsg. & Redevel. Authority (CHC/CHCS Obligated Group)¹		5.000			08/15/2034		35,414

	35,000	Minneapolis & St. Paul, MN Hsg. & Redevel. Authority (CHC/CHCS Obligated Group)¹		5.250			08/15/2035		36,736

	25,000	Minneapolis & St. Paul, MN Hsg. & Redevel. Authority (GHP/HPA/HP Obligated Group)¹		5.125			12/01/2015		25,200

	650,000	Minneapolis & St. Paul, MN Hsg. & Redevel. Authority (GHP/HPA/HP Obligated Group)¹		5.875			12/01/2029		654,485

	90,000	Minneapolis & St. Paul, MN Hsg. Finance Board (Single Family Mtg.)¹		5.520			03/01/2041		96,167

	308,996	Minneapolis & St. Paul, MN Hsg. Finance Board (Single Family Mtg.)¹		5.250			12/01/2040		323,516

	56,500	Minneapolis & St. Paul, MN Hsg. Finance Board (Single Family Mtg.)¹		5.450			04/01/2027		59,835

	47,527	Minneapolis & St. Paul, MN Hsg. Finance Board (Single Family Mtg.)¹		5.000			12/01/2038		47,558

	40,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2027		41,327

	25,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2020		26,211

	1,000,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2022		1,105,700

	1,000,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2020		1,110,860

	85,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2022		89,041

	30,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2025		32,725

	200,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2031		205,784

	160,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2023		176,957

18 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 100,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000	%		01/01/2023	$	104,754

	50,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission¹		5.000			01/01/2025		52,191

	8,000,000	Minneapolis & St. Paul, MN Metropolitan AirportsCommission³		5.000			01/01/2035		8,343,760

	125,000	Minneapolis, MN (Carechoice Member)		5.875			04/01/2024		121,734

	1,250,000	Minneapolis, MN Charter School (Yinghua Academy)		6.000			07/01/2043		1,185,300

	470,000	Minneapolis, MN Collateralized Multifamily Hsg. (Vantage Flats)¹		5.200			10/20/2048		471,123

	5,000	Minneapolis, MN Community Devel. Agency (Cord-Sets)¹		5.500			06/01/2018		5,021

	525,000	Minneapolis, MN Community Devel. Agency (Riverside Homes of Minneapolis)¹		6.200			09/01/2029		525,572

	500,000	Minneapolis, MN Devel. (Limited Tax Supported Community Bond Fund)¹		6.000			12/01/2040		541,665

	50,000	Minneapolis, MN Health Care System (Fairview Health Services)		5.500			05/15/2014		50,454

	40,000	Minneapolis, MN Health Care System (Fairview Health Services)¹		5.000			05/15/2021		40,256

	1,390,000	Minneapolis, MN Health Care System (Fairview Health Services/FSP/FSH/FRCS/RRHS/FRWHS Obligated Group)¹		6.500			11/15/2038		1,590,772

	175,000	Minneapolis, MN Health Care System (Fairview Health System/FSP/FSH/FRCS/RRHS/FRWHS Obligated Group)¹		5.000			11/15/2030		175,882

	105,000	Minneapolis, MN Health Care System (Fairview Health System/FSP/FSH/FRCS/RRHS/FRWHS Obligated Group)¹		6.625			11/15/2028		122,355

	50,000	Minneapolis, MN Health Care System (Fairview Health System/FSP/FSH/FRCS/RRHS/FRWHS Obligated Group)¹		5.000			11/15/2034		50,072

	600,000	Minneapolis, MN Health Care System (Fairview Health System/FSP/FSH/FRCS/RRHS/FRWHS Obligated Group)¹		6.375			11/15/2023		699,780

	200,000	Minneapolis, MN Multifamily Hsg. (Blaisdell Apartments)		5.500			04/01/2042		153,206

	1,275,000	Minneapolis, MN Multifamily Hsg. (Blaisdell Apartments)		5.400			04/01/2028		1,082,755

	20,000	Minneapolis, MN Multifamily Hsg. (East Village Hsg. Corp.)¹		5.750			10/20/2042		20,011

	55,000	Minneapolis, MN Multifamily Hsg. (Seward Towers)¹		5.000			05/20/2036		55,371

	3,975,000	Minneapolis, MN Multifamily Hsg. (Shingle Creek Senior Hsg.)¹		5.550			10/20/2042		4,041,541

	1,575,000	Minneapolis, MN Multifamily Hsg. (Sumner Field Phase II)¹		5.150			02/20/2045		1,575,079

	100,000	Minneapolis, MN Student Hsg. (Riverton Community Hsg.)		5.600			08/01/2026		97,756

	250,000	Minneapolis, MN Supported Devel. (Common Bond Fund)¹		5.000			06/01/2028		250,565

19 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENT OF INVESTMENTS Unaudited / Continued


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 380,000	Minneapolis, MN Tax Increment (East River/Unocal Site)		5.250	%		02/01/2026	$	361,091

	2,250,000	Minneapolis, MN Tax Increment (Grant Park)		5.350			02/01/2030		2,010,465

	600,000	Minneapolis, MN Tax Increment (Grant Park)		5.200			02/01/2022		593,568

	500,000	Minneapolis, MN Tax Increment (Ivy Tower)		5.500			02/01/2022		469,385

	1,250,000	Minneapolis, MN Tax Increment (St. Anthony Falls)		5.750			02/01/2027		1,160,787

	635,000	Minneapolis, MN Tax Increment (Unocal Site)		5.400			02/01/2031		570,852

	25,000	MN Agricultural & Economic Devel. Board (Benedictine Care Centers)		5.750			02/01/2030		24,685

	100,000	MN Agricultural & Economic Devel. Board (Essentia Health/ECHC Obligated Groups)¹		5.500			02/15/2025		110,996

	25,000	MN Agricultural & Economic Devel. Board (Essentia Health/ECHC Obligated Groups)¹		5.000			02/15/2030		25,748

	115,000	MN Agricultural & Economic Devel. Board (Fairview Health Services/FRRHS/FRWHS Obligated Group)¹		6.375			11/15/2029		115,390

	155,000	MN Agricultural & Economic Devel. Board (Fairview Health Services/FRRHS/FRWHS Obligated Group)		6.375			11/15/2022		155,659

	495,000	MN Agricultural & Economic Devel. Board (Fairview Hospital and Healthcare Service)¹		5.750			11/15/2026		495,530

	25,000	MN Agricultural & Economic Devel. Board (SMDCHS/SJMC Obligated Group)		4.750			02/15/2016		25,064

	600,000	MN HEFA (Bethel University)		5.500			05/01/2037		600,354

	410,000	MN HEFA (Bethel University)		5.500			05/01/2022		420,861

	500,000	MN HEFA (College of St. Scholastica)¹		6.300			12/01/2040		523,835

	875,000	MN HEFA (College of St. Scholastica)¹		5.125			12/01/2040		873,022

	150,000	MN HEFA (College of St. Scholastica)¹		6.000			12/01/2028		160,327

	1,000,000	MN HEFA (College of St. Scholastica)¹		5.250			12/01/2035		1,014,650

	500,000	MN HEFA (Hamline University)¹		5.000			10/01/2029		512,760

	500,000	MN HEFA (Hamline University)¹		6.000			10/01/2032		527,925

	500,000	MN HEFA (Macalester College)¹		5.000			06/01/2035		533,815

	200,000	MN HEFA (St. Catherine University)		5.000			10/01/2027		207,860

	300,000	MN HEFA (St. Catherine University)		5.000			10/01/2025		321,789

	280,000	MN HEFA (St. Catherine University)		5.000			10/01/2026		293,703

	160,000	MN HEFA (University of St. Thomas)^1,2		5.250			10/01/2034		164,757

	125,000	MN HFA (Homeownership)^1,2		5.000			01/01/2031		125,309

	100,000	MN HFA (Rental Hsg.)¹		5.000			08/01/2040		99,846

	1,050,000	MN HFA (Rental Hsg.)		5.300			08/01/2044		1,064,868

	250,000	MN HFA (Rental Hsg.)		5.000			08/01/2033		253,672

	75,000	MN HFA (Residential Hsg.)¹		5.250			07/01/2033		76,141

	200,000	MN HFA (Residential Hsg.)		3.750			01/01/2022		206,888

	545,000	MN HFA (Residential Hsg.)²		3.750			07/01/2022		553,513

	535,000	MN HFA (Residential Hsg.)^1,2		5.050			07/01/2034		563,269

	600,000	MN HFA (Residential Hsg.)^1,2		5.100			01/01/2040		607,104

	240,000	MN HFA (Residential Hsg.)¹		5.100			07/01/2031		241,248

	15,000	MN HFA (Residential Hsg.)¹		5.900			07/01/2028		15,628

	20,000	MN HFA (Residential Hsg.)¹		5.000			07/01/2038		20,580

	50,000	MN HFA (Residential Hsg.)^1,2		5.200			01/01/2023		52,683

	5,000	MN HFA (Residential Hsg.)¹		5.750			01/01/2038		5,055

	70,000	MN HFA (Residential Hsg.)		5.100			07/01/2038		73,646

20 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 65,000	MN HFA (Residential Hsg.)¹		5.000	%		07/01/2023	$	68,308

	20,000	MN HFA (Residential Hsg.)¹		5.150			07/01/2028		20,488

	35,000	MN HFA (Residential Hsg.)¹		5.500			01/01/2038		36,770

	115,000	MN HFA (Residential Hsg.)¹		4.600	⁴		07/01/2022		117,168

	25,000	MN Municipal Power Agency¹		5.000			10/01/2034		25,731

	10,000	MN Municipal Power Agency¹		5.000			10/01/2035		10,111

	765,000	MN Municipal Power Agency¹		5.000			10/01/2025		834,233

	750,000	MN Municipal Power Agency¹		5.250			10/01/2035		782,550

	640,000	MN Office of Higher Education (Supplemental Student Loan)¹		5.000			11/01/2029		665,114

	1,410,000	MN Seaway Port Authority of Duluth (Northstar Aerospace)		5.200			04/01/2027		1,279,899

	430,000	MN Seaway Port Authority of Duluth (Northstar Aerospace)		5.000			04/01/2017		426,938

	100,000	Moorhead, MN Health Care (Evercare Senior Living)		5.000			09/01/2032		86,536

	500,000	Moorhead, MN Health Care (Evercare Senior Living)		5.125			09/01/2037		422,840

	150,000	New Hope, MN Hsg. & Health Care Facilities (Minnesota Masonic Home North Ridge)		5.875			03/01/2029		143,974

	250,000	New Ulm, MN Economic Devel. Authority (HADC Ridgeway)		6.000			06/01/2041		250,195

	1,100,000	North Oaks, MN Senior Hsg. (Presbyterian Homes of North Oaks)		6.500			10/01/2047		1,124,211

	300,000	Norwood Young America MN EDA (Harbor at Peace Village)		4.000			08/01/2026		268,089

	100,000	Norwood Young America MN EDA (Harbor at Peace Village)		4.100			08/01/2027		88,731

	1,250,000	Oak Park Heights, MN Nursing Home (Boutwells Landing Care Center)		6.000			08/01/2036		1,253,562

	600,000	Oakdale, MN Revenue (Oak Meadows Senior Hsg.)		5.000			04/01/2034		534,294

	205,000	Oronoco, MN Multifamily Hsg. (Wedum Shorewood Campus)		5.400			06/01/2041		176,993

	750,000	Otter Tail County, MN (Prairie Lakes Municipal Solid Waste Authority)¹		5.000			11/01/2030		796,613

	170,000	Pine City, MN Health Care & Hsg. (North Branch)		5.000			10/20/2047		170,097

	200,000	Pine City, MN Health Care & Hsg. (North Branch)		6.125			10/20/2047		197,874

	125,000	Prior Lake, MN Senior Hsg. (Shepherds Path Senior Hsg.)		5.750			08/01/2041		111,675

	5,000	Ramsey County, MN Hsg. & Redevel. Authority (Hanover Townhouses)		5.625			07/01/2016		5,004

	1,250,000	Red Wing, MN Senior Hsg. (Deer Crest)		5.000			11/01/2042		1,033,025

	425,000	Red Wing, MN Senior Hsg. (Deer Crest)		5.000			11/01/2027		406,343

	330,000	Red Wing, MN Senior Hsg. (Deer Crest)		5.000			11/01/2032		293,812

	500,000	Redwood Falls, MN (Redwood Area Hospital)		5.125			12/01/2036		481,750

	430,000	Rochester, MN Electric Utility		5.000			12/01/2032		464,495

	250,000	Rochester, MN Health Care & Hsg. (Samaritan Bethany)		7.375			12/01/2041		263,890

	245,000	Rochester, MN Health Care Facilities (Olmstead Medical Center)		5.000			07/01/2027		263,074

	750,000	Rochester, MN Health Care Facilities (Olmstead Medical Center)¹		5.875			07/01/2030		812,145

21 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENT OF INVESTMENTS Unaudited / Continued


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 225,000	Rochester, MN Health Care Facilities (Olmstead Medical Center)		5.000	%		07/01/2028	$	238,990

	650,000	Rochester, MN Health Care Facilities (Olmstead Medical Center)		5.000			07/01/2033		672,009

	5,000	Rosemount, MN GO¹		5.400			02/01/2016		5,022

	50,000	Saint Cloud, MN Health Care (CCHS/CCHSM/CCHSLP/StCH Obligated Group)¹		5.000			05/01/2025		51,588

	135,000	Saint Cloud, MN Health Care (CCHS/CCHSM/CCHSLP/StCH Obligated Group)¹		5.500			05/01/2039		141,394

	15,000	Saint Cloud, MN Health Care (CCHS/CCHSM/CCHSLP/StCH Obligated Group)¹		5.125			05/01/2030		15,826

	1,000,000	Sartell, MN Health Care & Hsg. Facilities (Country Manor Campus)		5.250			09/01/2027		945,170

	795,000	Sartell, MN Health Care & Hsg. Facilities (Country Manor Campus)		5.250			09/01/2030		724,650

	500,000	Sauk Rapids, MN Health Care Housing Facilities (Good Shepard Lutheran Home)		5.125			01/01/2039		434,380

	250,000	Sauk Rapids, MN Health Care Housing Facilities (Good Shepard Lutheran Home)		7.500			01/01/2039		286,438

	15,000	South Washington County, MN Independent School District No. 833 COP		5.250			12/01/2014		15,050

	10,000	Southern MN Municipal Power Agency¹		5.000			01/01/2024		10,914

	750,000	Southern MN Municipal Power Agency¹		5.250			01/01/2030		792,518

	750,000	St. Anthony, MN Hsg. & Redevel. Authority (Silver Lake Village)		5.625			02/01/2031		702,998

	50,000	St. Anthony, MN Hsg. & Redevel. Authority (Silver Lake Village)		5.000			08/01/2015		50,338

	1,000,000	St. Anthony, MN Hsg. & Redevel. Authority (Silver Lake Village)		5.000			02/01/2031		876,420

	250,000	St. Louis Park, MN EDA (Hoigaard Village)		5.000			02/01/2023		254,383

	2,455,000	St. Louis Park, MN Health Care Facilities (PNHS)¹		5.750			07/01/2039		2,565,180

	100,000	St. Louis Park, MN Health Care Facilities (PNHS)¹		5.500			07/01/2029		104,317

	30,000	St. Louis Park, MN Health Care Facilities (PNHS/PNMC Obligated Group)¹		5.750			07/01/2030		31,501

	50,000	St. Louis Park, MN Health Care Facilities (PNMH/PNMC Holdings/PNI Obligated Group)¹		5.500			07/01/2023		53,662

	100,000	St. Paul, MN Hsg. & Redevel. Authority (Achieve Language Academy)		6.750			12/01/2022		100,135

	50,000	St. Paul, MN Hsg. & Redevel. Authority (Allina Health System)¹		5.250			11/15/2028		52,923

	55,000	St. Paul, MN Hsg. & Redevel. Authority (Allina Health System)¹		5.000			11/15/2020		61,917

	600,000	St. Paul, MN Hsg. & Redevel. Authority (Bridgecreek Senior Place)		7.000			09/15/2037		565,560

	30,000	St. Paul, MN Hsg. & Redevel. Authority (Civic Center)		5.450			11/01/2013		30,122

	585,000	St. Paul, MN Hsg. & Redevel. Authority (Community of Peace Building Company)¹		5.000			12/01/2036		512,232

	300,000	St. Paul, MN Hsg. & Redevel. Authority (Great Northern Lofts)		6.250			03/01/2029		299,688

22 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 400,000	St. Paul, MN Hsg. & Redevel. Authority (HealthEast/HESJH/HSJH Obligation Group)¹		6.000	%		11/15/2025	$	413,788

	215,000	St. Paul, MN Hsg. & Redevel. Authority (HealthEast/HESJH/HSJH Obligation Group)¹		6.000			11/15/2035		218,986

	1,000,000	St. Paul, MN Hsg. & Redevel. Authority (Higher Ground Academy)¹		5.125			12/01/2038		892,960

	150,000	St. Paul, MN Hsg. & Redevel. Authority (Hmong Academy)¹		6.000			09/01/2036		145,278

	750,000	St. Paul, MN Hsg. & Redevel. Authority (Minneapolis Public Radio)¹		5.000			12/01/2025		805,658

	250,000	St. Paul, MN Hsg. & Redevel. Authority (Nova Classical Academy)¹		6.375			09/01/2031		261,998

	500,000	St. Paul, MN Hsg. & Redevel. Authority (Package Facilities)¹		5.000			08/01/2035		508,855

	750,000	St. Paul, MN Hsg. & Redevel. Authority (Selby Grotto Hsg.)¹		5.500			09/20/2044		750,240

	950,000	St. Paul, MN Hsg. & Redevel. Authority (Smith Avenue)¹		5.000			08/01/2035		966,141

	1,000,000	St. Paul, MN Hsg. & Redevel. Authority (St. Paul Conservatory for Performing Arts)		4.625			03/01/2043		804,040

	1,000,000	St. Paul, MN Hsg. & Redevel. Authority (University Dale Apartments)¹		4.820			07/20/2046		989,870

	220,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			09/01/2020		219,472

	225,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			03/01/2021		222,354

	235,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			09/01/2021		232,065

	185,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			03/01/2020		184,599

	240,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			09/01/2022		234,979

	180,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			03/01/2019		181,384

	185,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			09/01/2019		186,522

	140,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			03/01/2022		137,215

	935,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			03/01/2029		891,448

	1,000,000	St. Paul, MN Hsg. & Redevel. Authority (Upper Landing)		5.000			09/01/2026		967,610

	500,000	St. Paul, MN Hsg. & Redevel. Authority Charter School (German Immersion School)		5.000			07/01/2044		412,675

	500,000	St. Paul, MN Hsg. & Redevel. Authority Charter School (German Immersion School)		5.000			07/01/2033		444,130

	1,500,000	St. Paul, MN Hsg. & Redevel. Authority Charter School (Hmong College Prep Academy)		5.500			09/01/2043		1,341,060

	500,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facilities (Carondelet Village)		6.000			08/01/2035		507,635

23 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENT OF INVESTMENTS Unaudited / Continued


Principal Amount			Coupon			Maturity		Value

	Minnesota Continued
	$ 1,000,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facilities (Episcopal Senior Homes)		5.150	%		11/01/2042	$	830,080

	1,000,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facilities (Episcopal Senior Homes)		5.000			05/01/2038		826,600

	255,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facilities (Episcopal Senior Homes)		5.125			05/01/2048		204,365

	25,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facility (GHP/RH/MAC Obligated Group)¹		5.250			05/15/2017		27,665

	920,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facility (GHP/RH/MAC Obligated Group)¹		5.250			05/15/2036		932,760

	50,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facility (Regions Hospital)¹		5.250			05/15/2018		50,126

	685,000	St. Paul, MN Hsg. & Redevel. Authority Health Care Facility (Regions Hospital)¹		5.300			05/15/2028		685,459

	75,000	St. Paul, MN Port Authority (Amherst H Wilder Foundation)¹		5.000			12/01/2036		77,040

	500,000	St. Paul, MN Port Authority (Gerdau Ameristeel)		4.500			10/01/2037		398,255

	2,430,000	St. Paul, MN Port Authority (Great Northern)		6.000			03/01/2030		2,341,499

	1,375,000	St. Paul, MN Port Authority (Regions Hospital Parking Ramp)		5.000			08/01/2036		1,278,516

	900,000	Stillwater, MN Multifamily (Orleans Homes)		5.375			02/01/2032		770,013

	510,000	Stillwater, MN Multifamily (Orleans Homes)		5.500			02/01/2042		413,559

	1,000,000	University of Minnesota¹		5.000			08/01/2036		1,050,850

	750,000	University of Minnesota¹		5.250			12/01/2031		842,708

	500,000	University of Minnesota¹		5.000			12/01/2036		535,925

	500,000	Victoria, MN Private School Facility (Holy Family Catholic High School)		5.000			09/01/2029		485,555

	35,000	Virginia, MN Hsg. & Redevel. Authority Health Care Facilities¹		5.375			10/01/2030		35,417

	250,000	Wayzata, MN Senior Hsg. (Folkstone Senior Living Community)		5.500			11/01/2032		244,500

	500,000	Wayzata, MN Senior Hsg. (Folkstone Senior Living Community)		6.000			05/01/2047		503,195

	250,000	Wayzata, MN Senior Hsg. (Folkstone Senior Living Community)		5.750			11/01/2039		246,990

	170,000	Willmar, MN Hsg. & Redevel. Authority (Highlands Apts.)¹		5.850			06/01/2019		170,148

	750,000	Winona, MN Health Care Facilities (Winona Health Services)		5.000			07/01/2034		720,458

	210,000	Woodbury, MN Charter School (MSA Building Company)¹		5.000			12/01/2027		202,950

	885,000	Woodbury, MN Charter School (MSA Building Company)¹		5.000			12/01/2043		763,313

	220,000	Woodbury, MN Charter School (MSA Building Company)¹		5.000			12/01/2032		201,685

									135,384,861

	U.S. Possessions—2.9%
	1,000,000	Puerto Rico Commonwealth GO¹		5.750			07/01/2041		698,120

	1,000,000	Puerto Rico Commonwealth GO		5.500			07/01/2039		677,730

24 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND


Principal Amount			Coupon			Maturity		Value

	U.S. Possessions Continued
	$ 250,000	Puerto Rico Electric Power Authority, Series CCC¹		5.250	%		07/01/2028	$	188,385

	250,000	Puerto Rico Highway & Transportation Authority¹		5.300			07/01/2035		171,630

	100,000	Puerto Rico ITEMECF (Ana G. Mendez University)		5.000			04/01/2027		82,179

	100,000	Puerto Rico ITEMECF (Ana G. Mendez University)		5.375			04/01/2042		74,676

	100,000	Puerto Rico ITEMECF (Ana G. Mendez University)		5.125			04/01/2032		78,027

	2,000,000	Puerto Rico Sales Tax Financing Corp., Series A		5.490	⁵		08/01/2036		368,160

	2,000,000	Puerto Rico Sales Tax Financing Corp., Series A		6.160	⁵		08/01/2034		432,260

	90,000	Puerto Rico Sales Tax Financing Corp., Series A¹		5.750			08/01/2037		74,078

	500,000	Puerto Rico Sales Tax Financing Corp., Series C¹		5.250			08/01/2041		379,575

	500,000	Puerto Rico Sales Tax Financing Corp., Series C¹		6.000			08/01/2039		410,965

									3,635,785

	Total Investments, at Value (Cost $141,594,918)—111.1%								139,020,646

	Liabilities in Excess of Other Assets—(11.1)								(13,915,118	)

	Net Assets—100.0%							$	125,105,528

Footnotes to Statement of Investments

1. All or a portion of the security position has been segregated for collateral to cover borrowings. See Note 6 of the accompanying Notes.

2. All or a portion of the security position is when-issued or delayed delivery to be delivered and settled after September 30, 2013. See Note 1 of the accompanying Notes.

3. Security represents the underlying municipal bond with respect to an inverse floating rate security held by the Fund. The bond was purchased by the Fund and subsequently transferred to a trust, which issued the related inverse floating rate security. See Note 1 of the accompanying Notes.

4. Represents the current interest rate for a variable or increasing rate security.

5. Zero coupon bond reflects effective yield on the date of purchase.

To simplify the listings of securities, abbreviations are used per the table below:


CCHS		Centracare Health System
CCHSLP		Centracare Health Services of Long Prairie
CCHSM		Centracare Health Services of Melrose
CHC		Children’s Health Care
CHCS		Children’s Health Care Services
COP		Certificates of Participation
ECHC		Essentia Community Hospitals & Clinics
EDA		Economic Devel. Authority
FRCS		Fairview Regional Community Services
FRRHS		Fairview Range Regional Health Services
FRWHS		Fairview Red Wing Health Services
FSH		Fairview Seminary Home
FSP		Fairview Seminary Plaza
GHP		Group Health Plan
GO		General Obligation
HADC		Housing Alternatives Development Company
HEFA		Higher Education Facilities Authority
HESJH		HealthEast St. John’s Hospital
HFA		Housing Finance Agency
HP		HealthPartners
HPA		HealthPartners Administrators
HSJH		HealthEast St. Joseph’s Hospital

25 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENT OF INVESTMENTS Unaudited / Continued

Footnotes to Statement of Investments Continued


ITEMECF		Industrial, Tourist, Educational, Medical and Environmental Community Facilities
MAC		Midwest Assurance Company
MSA		Math & Science Academy
PHS		Pinnacle Health System
PNHS		Park Nicollet Health Services
PNI		Park Nicollet Institute
PNMH		Park Nicollet Methodist Hospital
RH		Regions Hospital
ROLs		Reset Options Longs
RRHS		Range Regional Health Services
SJMC		St. Joseph’s Medical Center
SMDCHS		St. Mary’s Duluth Clinic Health System
StCH		St. Cloud Hospital
VOA		Volunteers of America

See accompanying Notes to Financial Statements.

26 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

STATEMENT OF

ASSETS AND LIABILITIES September 30, 2013 Unaudited



Assets
Investments, at value (cost $141,594,918)—see accompanying statement of investments	$	139,020,646

Cash		62,170

Receivables and other assets:
Interest		2,056,424
Investments sold on a when-issued or delayed delivery basis		105,000
Shares of beneficial interest sold		37,001
Other		30,493

Total assets		141,311,734

Liabilities
Payables and other liabilities:
Payable for borrowings (See Note 6)		9,700,000
Payable for short-term floating rate notes issued (See Note 1)		6,000,000
Shares of beneficial interest redeemed		338,807
Dividends		87,488
Distribution and service plan fees		24,821
Transfer and shareholder servicing agent fees		9,543
Shareholder communications		5,579
Trustees’ compensation		3,946
Interest expense on borrowings		1,326
Other		34,696

Total liabilities		16,206,206

Net Assets	$	125,105,528



Composition of Net Assets
Par value of shares of beneficial interest	$	10,304

Additional paid-in capital		130,059,053

Accumulated net investment income		796,269

Accumulated net realized loss on investments		(3,185,826)

Net unrealized depreciation on investments		(2,574,272)

Net Assets	$	125,105,528

27 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENT OF ASSETS AND LIABILITIES Continued



Net Asset Value Per Share
Class A Shares:
Net asset value and redemption price per share (based on net assets of $89,039,596 and 7,331,580 shares of beneficial interest outstanding)			$12.14
Maximum offering price per share (net asset value plus sales charge of 4.75% of offering price)			$12.75

Class B Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $2,901,655 and 239,146 shares of beneficial interest outstanding)			$12.13

Class C Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $29,330,206 and 2,417,536 shares of beneficial interest outstanding)			$12.13

Class Y Shares:
Net asset value, redemption price and offering price per share (based on net assets of $3,834,071 and 315,713 shares of beneficial interest outstanding)			$12.14

See accompanying Notes to Financial Statements

28 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

STATEMENT OF

OPERATIONS For the Six Months Ended September 30, 2013 Unaudited



Investment Income
Interest	$	3,650,477

Other income		24

Total investment income		3,650,501


Expenses
Management fees		391,125

Distribution and service plan fees:
Class A		125,722
Class B		16,387
Class C		171,188

Transfer and shareholder servicing agent fees:
Class A		34,757
Class B		1,474
Class C		14,134
Class Y		1,590

Shareholder communications:
Class A		17,373
Class B		933
Class C		7,173
Class Y		627

Borrowing fees		58,181

Interest expense and fees on short-term floating rate notes issued (See Note 1)		23,222

Interest expense on borrowings		4,910

Trustees’ compensation		1,258

Custodian fees and expenses		869

Other		27,306

Total expenses		898,229
Less waivers and reimbursements of expenses		(104,656)

Net expenses		793,573


Net Investment Income		2,856,928


Realized and Unrealized Loss
Net realized loss on investments		(1,038,486)

Net change in unrealized appreciation/depreciation on investments		(10,547,507)


Net Decrease in Net Assets Resulting from Operations		$ (8,729,065)

See accompanying Notes to Financial Statements.

29 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		STATEMENTS OF CHANGES IN NET ASSETS


	Six Months Ended September 30, 2013 (Unaudited)		Year Ended March 28, 2013¹

Operations
Net investment income	$	2,856,928	$	4,832,932

Net realized gain (loss)		(1,038,486)		637,034

Net change in unrealized appreciation/depreciation		(10,547,507)		2,793,927

Net increase (decrease) in net assets resulting from operations		(8,729,065)		8,263,893


Dividends and/or Distributions to Shareholders
Dividends from net investment income:
Class A		(1,935,480)		(3,694,500)
Class B		(50,519)		(119,976)
Class C		(527,118)		(986,347)
Class Y		(74,403)		(88,207)

		(2,587,520)		(4,889,030)


Beneficial Interest Transactions
Net increase (decrease) in net assets resulting from beneficial interest transactions:
Class A		(11,338,904)		32,254,225
Class B		(448,706)		190,509
Class C		(4,267,854)		11,983,996
Class Y		754,334		2,063,091

		(15,301,130)		46,491,821


Net Assets
Total increase (decrease)		(26,617,715)		49,866,684

Beginning of period		151,723,243		101,856,559

End of period (including accumulated net investment income of $796,269 and $526,861, respectively)	$	125,105,528	$	151,723,243

1. March 28, 2013 represents the last business day of the Fund’s reporting period. See Note 1 of the accompanying Notes.

See accompanying Notes to Financial Statements.

30 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

STATEMENT OF

CASH FLOWS For the Six Months Ended September 30, 2013 Unaudited



Cash Flows from Operating Activities
Net decrease in net assets from operations		$ (8,729,065)

Adjustments to reconcile net decrease in net assets from operations to net cash provided by operating activities:
Purchase of investment securities		(15,954,578)
Proceeds from disposition of investment securities		23,585,831
Short-term investment securities, net		(1,322,998)
Premium amortization		297,157
Discount accretion		(1,505)
Net realized loss on investments		1,038,486
Net change in unrealized appreciation/depreciation on investments		10,547,507
Change in assets:
Decrease in other assets		9,578
Decrease in interest receivable		58,594
Increase in receivable for securities sold		(5,000)
Change in liabilities:
Decrease in other liabilities		(12,713)
Decrease in payable for securities purchased		(52,939)

Net cash provided by operating activities		9,458,355


Cash Flows from Financing Activities
Proceeds from borrowings		28,900,000
Payments on borrowings		(21,400,000)
Proceeds from shares sold		12,594,304
Payments on shares redeemed		(29,694,307)
Cash distributions paid		(201,707)

Net cash used in financing activities		(9,801,710)

Net decrease in cash		(343,355)

Cash, beginning balance		405,525

Cash, ending balance		$ 62,170

Supplemental disclosure of cash flow information:

Noncash financing activities not included herein consist of reinvestment of dividends and distributions of $2,376,686.

Cash paid for interest on borrowings—$3,649.

Cash paid for interest on short-term floating rate notes issued—$23,222.

See accompanying Notes to Financial Statements.

31 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		FINANCIAL HIGHLIGHTS


Class A	Six Months Ended September 30, 2013 (Unaudited)		Year Ended March 28, 2013¹			Year Ended March 30, 2012¹		Year Ended March 31, 2011		Year Ended March 31, 2010		Year Ended March 31, 2009

Per Share Operating Data
Net asset value, beginning of period	$	13.12	$	12.71		$	11.29	$	11.81	$	9.68	$	12.38

Income (loss) from investment operations:
Net investment income²		0.27		0.52			0.62		0.63		0.66		0.73
Net realized and unrealized gain (loss)		(1.01)		0.42			1.41		(0.52)		2.12		(2.78)

Total from investment operations		(0.74)		0.94			2.03		0.11		2.78		(2.05)

Dividends and/or distributions to shareholders:
Dividends from net investment income		(0.24)		(0.53)			(0.61)		(0.63)		(0.65)		(0.65)

Net asset value, end of period	$	12.14	$	13.12	��	$	12.71	$	11.29	$	11.81	$	9.68


Total Return, at Net Asset Value³		(5.65)%		7.45%			18.32%		0.84%		29.36%		(16.92)%

Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	89,040	$	108,373		$	73,683	$	49,725	$	34,074	$	25,181

Average net assets (in thousands)	$	100,569	$	92,625		$	60,122	$	45,723	$	30,488	$	24,459

Ratios to average net assets:⁴
Net investment income		4.22%		3.95%			5.07%		5.35%		6.00%		6.71%
Expenses excluding interest and fees on short-term floating rate notes issued and interest and fees from borrowings		0.94%		0.92%			0.95%		1.01%		1.04%		1.03%
Interest and fees from borrowings		0.09%		0.03%			0.08%		0.08%		0.29%		0.71%
Interest and fees on short-term floating rate notes issued⁵		0.03%		0.04%			0.06%		0.06%		0.00%		0.00%

Total expenses		1.06%		0.99%			1.09%		1.15%		1.33%		1.74%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses⁶		0.92%		0.87%			0.94%		0.94%		1.03%		0.80%

Portfolio turnover rate		12%		13%			4%		17%		14%		20%

32 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

1. March 28, 2013 and March 30, 2012 represent the last business days of the Fund’s respective reporting periods.

2. Per share amounts calculated based on the average shares outstanding during the period.

3. Assumes an initial investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.

4. Annualized for periods less than one full year.

5. Interest and fee expense relates to the Fund’s liability for short-term floating rate notes issued in conjunction with inverse floating rate security transactions.

6. Prior to July 1, 2009, the Manager voluntarily agreed to waive management fees and/or reimburse the Fund for certain expenses so that “Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses,” excluding expenses attributable to investments in inverse floaters, as a percentage of average daily net assets would not exceed 0.80%. Effective July 1, 2009, the Manager amended this voluntary undertaking so that this waiver would also exclude interest and fees from borrowings

See accompanying Notes to Financial Statements.

33 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		FINANCIAL HIGHLIGHTS Continued


Class B	Six Months Ended September 30, 2013 (Unaudited)		Year Ended March 28, 2013¹		Year Ended March 30, 2012¹		Year Ended March 31, 2011		Year Ended March 31, 2010		Year Ended March 31, 2009

Per Share Operating Data
Net asset value, beginning of period	$	13.10	$	12.70	$	11.28	$	11.80	$	9.67	$	12.37

Income (loss) from investment operations:
Net investment income²		0.22		0.42		0.52		0.54		0.58		0.65
Net realized and unrealized gain (loss)		(1.00)		0.41		1.42		(0.52)		2.12		(2.79)

Total from investment operations		(0.78)		0.83		1.94		0.02		2.70		(2.14)

Dividends and/or distributions to shareholders:
Dividends from net investment income		(0.19)		(0.43)		(0.52)		(0.54)		(0.57)		(0.56)

Net asset value, end of period	$	12.13	$	13.10	$	12.70	$	11.28	$	11.80	$	9.67


Total Return, at Net Asset Value³		(5.94)%		6.58%		17.45%		0.09%		28.43%		(17.57)%

Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	2,902	$	3,605	$	3,300	$	1,914	$	1,406	$	635

Average net assets (in thousands)	$	3,266	$	3,649	$	2,323	$	1,842	$	993	$	622

Ratios to average net assets:⁴
Net investment income		3.47%		3.23%		4.29%		4.60%		5.19%		5.96%
Expenses excluding interest and fees on short-term floating rate notes issued and interest and fees from borrowings		1.74%		1.72%		1.76%		1.82%		1.95%		2.09%
Interest and fees from borrowings		0.09%		0.03%		0.08%		0.08%		0.29%		0.71%
Interest and fees on short-term floating rate notes issued⁵		0.03%		0.04%		0.06%		0.06%		0.00%		0.00%

Total expenses		1.86%		1.79%		1.90%		1.96%		2.24%		2.80%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses⁶		1.67%		1.62%		1.69%		1.69%		1.80%		1.55%

Portfolio turnover rate		12%		13%		4%		17%		14%		20%

34 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

1. March 28, 2013 and March 30, 2012 represent the last business days of the Fund’s respective reporting periods.

2. Per share amounts calculated based on the average shares outstanding during the period.

4. Annualized for periods less than one full year.

5. Interest and fee expense relates to the Fund’s liability for short-term floating rate notes issued in conjunction with inverse floating rate security transactions.

6. Prior to July 1, 2009, the Manager voluntarily agreed to waive management fees and/or reimburse the Fund for certain expenses so that “Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses,” excluding expenses attributable to investments in inverse floaters, as a percentage of average daily net assets would not exceed 1.55%. Effective July 1, 2009, the Manager amended this voluntary undertaking so that this waiver would also exclude interest and fees from borrowings

See accompanying Notes to Financial Statements.

35 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		FINANCIAL HIGHLIGHTS Continued


Class C	Six Months Ended September 30, 2013 (Unaudited)		Year Ended March 28, 2013¹		Year Ended March 30, 2012¹		Year Ended March 31, 2011		Year Ended March 31, 2010		Year Ended March 31, 2009

Per Share Operating Data
Net asset value, beginning of period	$	13.10	$	12.69	$	11.28	$	11.79	$	9.67	$	12.37

Income (loss) from investment operations:
Net investment income²		0.22		0.42		0.52		0.54		0.57		0.65
Net realized and unrealized gain (loss)		(1.00)		0.42		1.41		(0.51)		2.11		(2.79)

Total from investment operations		(0.78)		0.84		1.93		0.03		2.68		(2.14)

Dividends and/or distributions to shareholders:
Dividends from net investment income		(0.19)		(0.43)		(0.52)		(0.54)		(0.56)		(0.56)

Net asset value, end of period	$	12.13	$	13.10	$	12.69	$	11.28	$	11.79	$	9.67


Total Return, at Net Asset Value³		(5.94)%		6.66%		17.36%		0.16%		28.31%		(17.57)%

Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	29,330	$	36,355	$	23,584	$	14,403	$	7,521	$	2,029

Average net assets (in thousands)	$	34,113	$	30,469	$	17,708	$	15,492	$	4,019	$	2,217

Ratios to average net assets:⁴
Net investment income		3.47%		3.19%		4.30%		4.55%		5.08%		5.88%
Expenses excluding interest and fees on short-term floating rate notes issued and interest and fees from borrowings		1.72%		1.70%		1.75%		1.77%		1.93%		2.13%
Interest and fees from borrowings		0.09%		0.03%		0.08%		0.08%		0.29%		0.71%
Interest and fees on short-term floating rate notes issued⁵		0.03%		0.04%		0.06%		0.06%		0.00%		0.00%

Total expenses		1.84%		1.77%		1.89%		1.91%		2.22%		2.84%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses⁶		1.67%		1.62%		1.68%		1.69%		1.82%		1.55%

Portfolio turnover rate		12%		13%		4%		17%		14%		20%

36 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

1. March 28, 2013 and March 30, 2012 represent the last business days of the Fund’s respective reporting periods.

2. Per share amounts calculated based on the average shares outstanding during the period.

4. Annualized for periods less than one full year.

5. Interest and fee expense relates to the Fund’s liability for short-term floating rate notes issued in conjunction with inverse floating rate security transactions.

6. Prior to July 1, 2009, the Manager voluntarily agreed to waive management fees and/or reimburse the Fund for certain expenses so that “Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses,” excluding expenses attributable to investments in inverse floaters, as a percentage of average daily net assets would not exceed 1.55%. Effective July 1, 2009, the Manager amended this voluntary undertaking so that this waiver would also exclude interest and fees from borrowings

See accompanying Notes to Financial Statements.

37 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		FINANCIAL HIGHLIGHTS Continued


Class Y	Six Months Ended September 30, 2013 (Unaudited)		Year Ended March 28, 2013¹		Period Ended March 30, 2012^1,2

Per Share Operating Data
Net asset value, beginning of period	$	13.12	$	12.71	$	11.91

Income (loss) from investment operations:
Net investment income³		0.27		0.52		0.40
Net realized and unrealized gain (loss)		(1.00)		0.43		0.81

Total from investment operations		(0.73)		0.95		1.21

Dividends and/or distributions to shareholders:
Dividends from net investment income		(0.25)		(0.54)		(0.41)

Net asset value, end of period	$	12.14	$	13.12	$	12.71


Total Return, at Net Asset Value⁴		(5.59)%		7.53%		10.36%


Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	3,834	$	3,390	$	1,290

Average net assets (in thousands)	$	3,752	$	2,208	$	600

Ratios to average net assets:⁵
Net investment income		4.32%		3.99%		4.75%
Expenses excluding interest and fees from borrowings		0.71%		0.73%		0.72%
Interest and fees from borrowings		0.09%		0.03%		0.03%
Interest and fees on short-term floating rates notes issued⁶		0.03%		0.04%		0.06%

Total expenses		0.83%		0.80%		0.81%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		0.83%		0.80%		0.81%

Portfolio turnover rate		12%		13%		4%

1. March 28, 2013 and March 30, 2012 represent the last business days of the Fund’s respective reporting periods.

2. For the period from July 29, 2011 (inception of offering) to March 30, 2012.

3. Per share amounts calculated based on the average shares outstanding during the period.

4. Assumes an initial investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.

5. Annualized for periods less than one full year.

6. Interest and fee expense relates to the Fund’s liability for short-term floating rate notes issued in conjunction with inverse floating rate security transactions.

See accompanying Notes to Financial Statements.

38 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

NOTES TO

FINANCIAL STATEMENTS September 30, 2013 Unaudited

1. Significant Accounting Policies

Oppenheimer Rochester Minnesota Municipal Fund (the “Fund”) is a diversified open-end management investment company registered under the Investment Company Act of 1940, as amended. The Fund’s investment objective is to seek a high level of current interest income exempt from federal and Minnesota state income taxes for individual investors as is consistent with preservation of capital. The Fund’s investment adviser is OFI Global Asset Management, Inc. (“OFI Global” or the “Manager”), a wholly-owned subsidiary of OFI (“OFI” or the “Sub-Adviser”). The Manager has entered into a sub-advisory agreement with OFI.

The Fund offers Class A, Class C and Class Y shares, and previously offered Class B shares for new purchase through June 29, 2012. Subsequent to that date, no new purchases of Class B shares are permitted, however reinvestment of dividend and/or capital gain distributions and exchanges of Class B shares into and from other Oppenheimer funds will be allowed. Class A shares are sold at their offering price, which is normally net asset value plus a front-end sales charge. Class C shares are sold, and Class B shares were sold, without a front-end sales charge but may be subject to a contingent deferred sales charge (“CDSC”). Class Y shares are sold to certain institutional investors or intermediaries without either a front-end sales charge or a CDSC, however, the intermediaries may impose charges on their accountholders who beneficially own Class Y shares. All classes of shares have identical rights and voting privileges with respect to the Fund in general and exclusive voting rights on matters that affect that class alone. Earnings, net assets and net asset value per share may differ due to each class having its own expenses, such as transfer and shareholder servicing agent fees and shareholder communications, directly attributable to that class. Class A, B and C shares have separate distribution and/or service plans under which they pay fees. Class Y shares do not pay such fees. Class B shares will automatically convert to Class A shares 72 months after the date of purchase.

The following is a summary of significant accounting policies consistently followed by the Fund.

Previous Annual Period. The last day of the Fund’s fiscal year was the last day the New York Stock Exchange was open for trading. The Fund’s financial statements have been presented through that date to maintain consistency with the Fund’s net asset value calculations used for shareholder transactions.

Inverse Floating Rate Securities. The Fund invests in inverse floating rate securities that pay interest at a rate that varies inversely with short-term interest rates. Because inverse floating rate securities are leveraged instruments, the value of an inverse floating rate security will change more significantly in response to changes in interest rates and other market fluctuations than the market value of a conventional fixed-rate municipal security of similar maturity and credit quality, including the municipal bond underlying an inverse floating rate security.

An inverse floating rate security is created as part of a financial transaction referred to as a “tender option bond” transaction. In most cases, in a tender option bond transaction the Fund sells a fixed-rate municipal bond (the “underlying municipal bond”) to a broker dealer (the “sponsor”). The sponsor creates a trust (the “Trust”) into which it deposits the

39 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

1. Significant Accounting Policies (Continued)

underlying municipal bond. The Trust then issues and sells short-term floating rate securities with a fixed principal amount representing a senior interest in the underlying municipal bond to third parties and a residual, subordinate interest in the underlying municipal bond (referred to as an “inverse floating rate security”) to the Fund. The interest rate on the short-term floating rate securities resets periodically, usually weekly, to a prevailing market rate and holders of these securities are granted the option to tender their securities back to the Trust for repurchase at their principal amount plus accrued interest thereon (the “purchase price”) periodically, usually daily or weekly. A remarketing agent for the Trust is required to attempt to re-sell any tendered short-term floating rate securities to new investors for the purchase price. If the remarketing agent is unable to successfully re-sell the tendered short-term floating rate securities, a liquidity provider to the Trust (typically an affiliate of the sponsor) must contribute cash to the Trust to ensure that the tendering holders receive the purchase price of their securities on the repurchase date.

Because holders of the short-term floating rate securities are granted the right to tender their securities to the Trust for repurchase at frequent intervals for the purchase price, with such payment effectively guaranteed by the liquidity provider, the securities generally bear short-term rates of interest commensurate with money market instruments. When interest is paid on the underlying municipal bond to the Trust, such proceeds are first used to pay the Trust’s administrative expenses and accrued interest to holders of the short-term floating rate securities, with any remaining amounts being paid to the Fund, as the holder of the inverse floating rate security. Accordingly, the amount of such interest on the underlying municipal bond paid to the Fund is inversely related to the rate of interest on the short-term floating rate securities. Additionally, because the principal amount of the short-term floating rate securities is fixed and is not adjusted in response to changes in the market value of the underlying municipal bond, any change in the market value of the underlying municipal bond is reflected entirely in a change to the value of the inverse floating rate security.

Typically, the terms of an inverse floating rate security grant certain rights to the Fund, as holder. For example, the Fund may have the right upon request to require that the Trust compel a tender of the short-term floating rate securities to facilitate the Fund’s acquisition of the underlying municipal bond. Following such a request, the Fund pays the Trust the purchase price of the short-term floating rate securities and a specified portion of any market value gain on the underlying municipal bond since its deposit into the Trust, which the Trust uses to redeem the short-term floating rate securities. The Trust then distributes the underlying municipal bond to the Fund. Similarly, the Fund may have the right to directly purchase the underlying municipal bond from the Trust by paying to the Trust the purchase price of the short-term floating rate securities and a specified portion of any market value gain on the underlying municipal bond since its deposit into the Trust, which the Trust uses to redeem the short-term floating rate securities. Through the exercise of either of these rights, the Fund can voluntarily terminate or “collapse” the Trust, terminate its investment in the related inverse floating rate security and obtain the underlying municipal bond. Additionally, the Fund also typically has the right to exchange with the Trust (i) a principal amount of short-term floating rate securities held by the Fund for a corresponding additional principal amount of the inverse floating rate security or (ii) a principal amount of the inverse floating rate

40 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

1. Significant Accounting Policies (Continued)

security held by the Fund for a corresponding additional principal amount of short-term floating rate securities (which are typically then sold to other investors). Through the exercise of this right, the Fund may increase (or decrease) the principal amount of short-term floating rate securities outstanding, thereby increasing (or decreasing) the amount of leverage provided by the short-term floating rate securities to the Fund’s investment exposure to the underlying municipal bond. The Fund’s investments in inverse floating rate securities involve certain risks. As short-term interest rates rise, an inverse floating rate security produces less current income (and, in extreme cases, may pay no income) and as short-term interest rates fall, an inverse floating rate security produces more current income. Thus, if short-term interest rates rise after the issuance of the inverse floating rate security, any yield advantage is reduced or eliminated. All inverse floating rate securities entail some degree of leverage represented by the outstanding principal amount of the related short-term floating rate securities. The value of, and income earned on, an inverse floating rate security that has a higher degree of leverage will fluctuate more significantly in response to changes in interest rates and to changes in the market value of the related underlying municipal bond than that of an inverse floating rate security with a lower degree of leverage, and is more likely to be eliminated entirely under adverse market conditions. Changes in the value of an inverse floating rate security will also be more significant than changes in the market value of the related underlying municipal bond because the leverage provided by the related short-term floating rate securities increases the sensitivity of an inverse floating rate security to changes in interest rates and to the market value of the underlying municipal bond. An inverse floating rate security can be expected to underperform fixed-rate municipal bonds when the difference between long-term and short-term interest rates is decreasing (or is already small) or when long-term interest rates are rising, but can be expected to outperform fixed-rate municipal bonds when the difference between long-term and short-term interest rates is increasing (or is already large) or when long-term interest rates are falling. Additionally, a tender option bond transaction typically provides for the automatic termination or “collapse” of a Trust upon the occurrence of certain adverse events, usually referred to as “mandatory tender events” or “tender option termination events.” These events may include, among others, a credit ratings downgrade of the underlying municipal bond below a specified level, a decrease in the market value of the underlying municipal bond below a specified amount, a bankruptcy of the liquidity provider or the inability of the remarketing agent to re-sell to new investors short-term floating rate securities that have been tendered for repurchase by holders thereof. Following the occurrence of such an event, the underlying municipal bond is generally sold for current market value and the proceeds distributed to holders of the short-term floating rate securities and inverse floating rate security, with the holder of the inverse floating rate security (the Fund) generally receiving the proceeds of such sale only after the holders of the short-term floating rate securities have received proceeds equal to the purchase price of their securities (and the liquidity provider is generally required to contribute cash to the Trust only in an amount sufficient to ensure that the holders of the short-term floating rate securities receive the purchase price of their securities in connection with such termination of the Trust).

41 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

1. Significant Accounting Policies (Continued)

Following the occurrence of such events, the Fund could potentially lose the entire amount of its investment in the inverse floating rate security.

Finally, the Fund may enter into shortfall/reimbursement agreements with the liquidity provider of certain tender option bond transactions in connection with certain inverse floating rate securities held by the Fund. These agreements commit the Fund to reimburse the liquidity provider to the extent that the liquidity provider must provide cash to a Trust, including following the termination of a Trust resulting from the occurrence of a “mandatory tender event.” In connection with the occurrence of such an event and the termination of the Trust triggered thereby, the shortfall/reimbursement agreement will make the Fund liable for the amount of the negative difference, if any, between the liquidation value of the underlying municipal bond and the purchase price of the short-term floating rate securities issued by the Trust. Under the standard terms of a tender option bond transaction, absent such a shortfall/reimbursement agreement, the Fund, as holder of the inverse floating rate security, would not be required to make such a reimbursement payment to the liquidity provider. The Manager monitors the Fund’s potential exposure with respect to these agreements on a daily basis and intends to take action to terminate the Fund’s investment in related inverse floating rate securities, if it deems it appropriate to do so. As of September 30, 2013, the Fund’s maximum exposure under such agreements is estimated at $6,000,000.

When the Fund creates an inverse floating rate security in a tender option bond transaction by selling an underlying municipal bond to a sponsor for deposit into a Trust, the transaction is considered a secured borrowing for financial reporting purposes. As a result of such accounting treatment, the Fund includes the underlying municipal bond on its Statement of Investments and as an asset on its Statement of Assets and Liabilities (but does not separately include the related inverse floating rate security on either). The Fund also includes a liability on its Statement of Assets and Liabilities equal to the outstanding principal amount and accrued interest on the related short-term floating rate securities issued by the Trust. Interest on the underlying municipal bond is recorded as investment income on the Fund’s Statement of Operations, while interest payable on the related short-term floating rate securities is recorded as interest expense. At September 30, 2013, municipal bond holdings with a value of $8,343,760 shown on the Fund’s Statement of Investments are held by such Trusts and serve as the underlying municipal bonds for the related $6,000,000 in short-term floating rate securities issued and outstanding at that date.

At September 30, 2013, the inverse floating rate securities associated with tender option bond transactions accounted for as secured borrowings were as follows:


Principal Amount		Inverse Floater¹	Coupon Rate²			Maturity Date		Value

$	2,000,000	Minneapolis & St. Paul, MN Metropolitan Airports Commission ROLs³		18.288	%		1/1/35	$	2,343,760

1. For a list of abbreviations used in the Inverse Floater table see the Portfolio Abbreviations table at the end of the Statement of Investments.

2. Represents the current interest rate for the inverse floating rate security.

3. Represents an inverse floating rate security that is subject to a shortfall/reimbursement agreement.

42 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

1. Significant Accounting Policies (Continued)

The Fund may also purchase an inverse floating rate security created as part of a tender option bond transaction not initiated by the Fund when a third party, such as a municipal issuer or financial institution, transfers an underlying municipal bond to a Trust. For financial reporting purposes, the Fund includes the inverse floating rate security related to such transaction on its Statement of Investments and as an asset on its Statement of Assets and Liabilities, and interest on the security is recorded as investment income on the Fund’s Statement of Operations.

The Fund may invest in inverse floating rate securities with any degree of leverage (as measured by the outstanding principal amount of related short-term floating rate securities). However, the Fund may only expose up to 20% of its total assets to the effects of leverage from its investments in inverse floating rate securities. This limitation is measured by comparing the aggregate principal amount of the short-term floating rate securities that are related to the inverse floating rate securities held by the Fund to the total assets of the Fund. The Fund’s exposure to the effects of leverage from its investments in inverse floating rate securities amounts to $6,000,000 or 4.25% of its total assets as of September 30, 2013.

Securities on a When-Issued or Delayed Delivery Basis. The Fund may purchase securities on a “when-issued” basis, and may purchase or sell securities on a “delayed delivery” basis. “When-issued” or “delayed delivery” refers to securities whose terms and indenture are available and for which a market exists, but which are not available for immediate delivery. Delivery and payment for securities that have been purchased by the Fund on a when-issued basis normally takes place within six months and possibly as long as two years or more after the trade date. During this period, such securities do not earn interest, are subject to market fluctuation and may increase or decrease in value prior to their delivery. The purchase of securities on a when-issued basis may increase the volatility of the Fund’s net asset value to the extent the Fund executes such transactions while remaining substantially fully invested. When the Fund engages in when-issued or delayed delivery transactions, it relies on the buyer or seller, as the case may be, to complete the transaction. Their failure to do so may cause the Fund to lose the opportunity to obtain or dispose of the security at a price and yield it considers advantageous. The Fund may also sell securities that it purchased on a when-issued basis or forward commitment prior to settlement of the original purchase.

As of September 30, 2013, the Fund had sold securities issued on a delayed delivery basis as follows:


	When-Issued or Delayed Delivery Basis Transactions

Sold securities		$105,000

43 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

1. Significant Accounting Policies (Continued)

Concentration Risk. There are certain risks arising from geographic concentration in any state, commonwealth or territory. Certain economic, regulatory or political developments occurring in the state, commonwealth or territory may impair the ability of certain issuers of municipal securities to pay principal and interest on their obligations.

Allocation of Income, Expenses, Gains and Losses. Income, expenses (other than those attributable to a specific class), gains and losses are allocated on a daily basis to each class of shares based upon the relative proportion of net assets represented by such class. Operating expenses directly attributable to a specific class are charged against the operations of that class.

Federal Taxes. The Fund intends to comply with provisions of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its investment company taxable income to shareholders. Therefore, no federal income or excise tax provision is required. The Fund files income tax returns in U.S. federal and applicable state jurisdictions. The statute of limitations on the Fund’s tax return filings generally remain open for the three preceding fiscal reporting period ends.

During the fiscal year ended March 28, 2013, the Fund utilized $625,744 of capital loss carryforward to offset capital gains realized in that fiscal year. Details of the fiscal year ended March 28, 2013 capital loss carryforwards are included in the table below. Capital loss carryforwards with no expiration, if any, must be utilized prior to those with expiration dates. Capital losses with no expiration will be carried forward to future years if not offset by gains.


Expiring

2016	$	1,825
2017		190,675
2018		1,937,724
2019		12,269

Total	$	2,142,493

As of September 30, 2013, it is estimated that the capital loss carryforwards would be $2,142,493 expiring by 2019 and $1,038,486 which will not expire. The estimated capital loss carryforward represents the carryforward as of the end of the last fiscal year, increased or decreased by capital losses or gains realized in the first six months of the current fiscal year. During the six months ended September 30, 2013, it is estimated that the Fund will not utilize any capital loss carryforward to offset realized capital gains.

Net investment income (loss) and net realized gain (loss) may differ for financial statement and tax purposes. The character of dividends and distributions made during the fiscal year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. Also, due to timing of dividends and distributions, the fiscal year in which amounts are distributed may differ from the fiscal year in which the income or net realized gain was recorded by the Fund.

44 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

1. Significant Accounting Policies (Continued)

The aggregate cost of securities and other investments and the composition of unrealized appreciation and depreciation of securities and other investments for federal income tax purposes as of September 30, 2013 are noted in the following table. The primary difference between book and tax appreciation or depreciation of securities and other investments, if applicable, is attributable to the tax deferral of losses or tax realization of financial statement unrealized gain or loss.


Federal tax cost of securities	$	135,621,744¹

Gross unrealized appreciation	$	3,536,754
Gross unrealized depreciation		(6,111,026)

Net unrealized depreciation	$	(2,574,272)

1. The Federal tax cost of securities does not include cost of $5,973,174, which has otherwise been recognized for financial reporting purposes, related to bonds placed into trusts in conjunction with certain investment transactions. See the Inverse Floating Rate Securities note above.

Trustees’ Compensation. The Fund has adopted an unfunded retirement plan (the “Plan”) for the Fund’s independent trustees. Benefits are based on years of service and fees paid to each trustee during their period of service. The Plan was frozen with respect to adding new participants effective December 31, 2006 (the “Freeze Date”) and existing Plan Participants as of the Freeze Date will continue to receive accrued benefits under the Plan. Active ndependent trustees as of the Freeze Date have each elected a distribution method with respect to their benefits under the Plan. During the six months ended September 30, 2013, the Fund’s projected benefit obligations, payments to retired trustees and accumulated liability were as follows:


Projected Benefit Obligations Increased			$ 40
Payments Made to Retired Trustees			—
Accumulated Liability as of September 30, 2013			966

The Board of Trustees has adopted a compensation deferral plan for independent trustees that enables trustees to elect to defer receipt of all or a portion of the annual compensation they are entitled to receive from the Fund. For purposes of determining the amount owed to the Trustee under the plan, deferred amounts are treated as though equal dollar amounts had been invested in shares of the Fund or in other Oppenheimer funds selected by the Trustee. The Fund purchases shares of the funds selected for deferral by the Trustee in amounts equal to his or her deemed investment, resulting in a Fund asset equal to the deferred compensation liability. Such assets are included as a component of “Other” within the asset section of the Statement of Assets and Liabilities. Deferral of trustees’ fees under the plan will not affect the net assets of the Fund, and will not materially affect the Fund’s assets, liabilities or net investment income per share. Amounts will be deferred until distributed in accordance with the compensation deferral plan.

Dividends and Distributions to Shareholders. Dividends and distributions to shareholders, which are determined in accordance with income tax regulations and may differ from U.S. generally accepted accounting principles, are recorded on the ex-dividend date.

45 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

1. Significant Accounting Policies (Continued)

Income distributions, if any, are declared daily and paid monthly. Capital gain distributions, if any, are declared and paid annually.

The tax character of distributions is determined as of the Fund’s fiscal year end. Therefore, a portion of the Fund’s distributions made to shareholders prior to the Fund’s fiscal year end may ultimately be categorized as a tax return of capital.

Investment Income. Interest income is recognized on an accrual basis. Discount and premium, which are included in interest income on the Statement of Operations, are amortized or accreted daily.

Custodian Fees. “Custodian fees and expenses” in the Statement of Operations may include interest expense incurred by the Fund on any cash overdrafts of its custodian account during the period. Such cash overdrafts may result from the effects of failed trades in portfolio securities and from cash outflows resulting from unanticipated shareholder redemption activity. The Fund pays interest to its custodian on such cash overdraft at a rate equal to the 1 Month LIBOR Rate plus 2.00%. The “Reduction to custodian expenses” line item, if applicable, represents earnings on cash balances maintained by the Fund during the period. Such interest expense and other custodian fees may be paid with these earnings.

Security Transactions. Security transactions are recorded on the trade date. Realized gains and losses on securities sold are determined on the basis of identified cost.

Indemnifications. The Fund’s organizational documents provide current and former trustees and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the Fund. In the normal course of business, the Fund may also enter into contracts that provide general indemnifications. The Fund’s maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against the Fund. The risk of material loss from such claims is considered remote.

Other. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates.

2. Securities Valuation

The Fund calculates the net asset value of its shares as of the close of the New York Stock Exchange (the “Exchange”), normally 4:00 P.M. Eastern time, on each day the Exchange is open for trading.

The Fund’s Board has adopted procedures for the valuation of the Fund’s securities and has delegated the day-to-day responsibility for valuation determinations under those procedures

46 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

2. Securities Valuation (Continued)

to the Manager. The Manager has established a Valuation Committee which is responsible for determining a “fair valuation” for any security for which market quotations are not “readily available.” The Valuation Committee’s fair valuation determinations are subject to review, approval and ratification by the Fund’s Board at its next regularly scheduled meeting covering the calendar quarter in which the fair valuation was determined.

Valuation Methods and Inputs

Securities are valued using unadjusted quoted market prices, when available, as supplied primarily by third party pricing services or dealers.

The following methodologies are used to determine the market value or the fair value of the types of securities described below:

Securities traded on a registered U.S. securities exchange (including exchange-traded derivatives other than futures and futures options) are valued based on the last sale price of the security reported on the principal exchange on which it is traded, prior to the time when the Fund’s assets are valued. In the absence of a sale, the security is valued at the last sale price on the prior trading day, if it is within the spread of the current day’s closing “bid” and “asked” prices, and if not, at the current day’s closing bid price. A security of a foreign issuer traded on a foreign exchange but not listed on a registered U.S. securities exchange is valued based on the last sale price on the principal exchange on which the security is traded, as identified by the third party pricing service used by the Manager, prior to the time when the Fund’s assets are valued. If the last sale price is unavailable, the security is valued at the most recent official closing price on the principal exchange on which it is traded. If the last sales price or official closing price for a foreign security is not available, the security is valued at the mean between the bid and asked price per the exchange or, if not available from the exchange, obtained from two dealers. If bid and asked prices are not available from either the exchange or two dealers, the security is valued by using one of the following methodologies (listed in order of priority); (1) using a bid from the exchange, (2) the mean between the bid and asked price as provided by a single dealer, or (3) a bid from a single dealer.

Shares of a registered investment company that are not traded on an exchange are valued at that investment company’s net asset value per share.

Corporate and government debt securities (of U.S. or foreign issuers) and municipal debt securities, event-linked bonds, loans, mortgage-backed securities, collateralized mortgage obligations, and asset-backed securities are valued at the mean between the “bid” and “asked” prices utilizing evaluated prices obtained from third party pricing services or broker-dealers who may use matrix pricing methods to determine the evaluated prices.

Short-term money market type debt securities with a remaining maturity of sixty days or less are valued at cost adjusted by the amortization of discount or premium to maturity (amortized cost), which approximates market value. Short-term debt securities with a remaining maturity in excess of sixty days are valued at the mean between the “bid” and “asked” prices utilizing evaluated prices obtained from third party pricing services or broker-dealers.

47 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

2. Securities Valuation (Continued)

A description of the standard inputs that may generally be considered by the third party pricing vendors in determining their evaluated prices is provided below.


Security Type		Standard inputs generally considered by third-party pricing vendors
Corporate debt, government debt, municipal, mortgage-backed and asset-backed securities		Reported trade data, broker-dealer price quotations, benchmark yields, issuer spreads on comparable securities, the credit quality, yield, maturity, and other appropriate factors.
Loans		Information obtained from market participants regarding reported trade data and broker-dealer price quotations.
Event-linked bonds		Information obtained from market participants regarding reported trade data and broker-dealer price quotations.

If a market value or price cannot be determined for a security using the methodologies described above, or if, in the “good faith” opinion of the Manager, the market value or price obtained does not constitute a “readily available market quotation,” or a significant event has occurred that would materially affect the value of the security the security is fair valued either (i) by a standardized fair valuation methodology applicable to the security type or the significant event as previously approved by the Valuation Committee and the Fund’s Board or (ii) as determined in good faith by the Manager’s Valuation Committee. The Valuation Committee considers all relevant facts that are reasonably available, through either public information or information available to the Manager, when determining the fair value of a security. Fair value determinations by the Manager are subject to review, approval and ratification by the Fund’s Board at its next regularly scheduled meeting covering the calendar quarter in which the fair valuation was determined. Those fair valuation standardized methodologies include, but are not limited to, valuing securities at the last sale price or initially at cost and subsequently adjusting the value based on: changes in company specific fundamentals, changes in an appropriate securities index, or changes in the value of similar securities which may be further adjusted for any discounts related to security-specific resale restrictions. When possible, such methodologies use observable market inputs such as unadjusted quoted prices of similar securities, observable interest rates, currency rates and yield curves. The methodologies used for valuing securities are not necessarily an indication of the risks associated with investing in those securities nor can it be assured that the Fund can obtain the fair value assigned to a security if it were to sell the security.

To assess the continuing appropriateness of security valuations, the Manager, or its third party service provider who is subject to oversight by the Manager, regularly compares prior day prices, prices on comparable securities, and sale prices to the current day prices and challenges those prices exceeding certain tolerance levels with the third party pricing service or broker source. For those securities valued by fair valuations, whether through a standardized fair valuation methodology or a fair valuation determination, the Valuation Committee reviews and affirms the reasonableness of the valuations based on such methodologies and fair valuation determinations on a regular basis after considering all relevant information that is reasonably available.

48 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

2. Securities Valuation (Continued)

Classifications

Each investment asset or liability of the Fund is assigned a level at measurement date based on the significance and source of the inputs to its valuation. Various data inputs are used in determining the value of each of the Fund’s investments as of the reporting period end. These data inputs are categorized in the following hierarchy under applicable financial accounting standards:

1) Level 1-unadjusted quoted prices in active markets for identical assets or liabilities (including securities actively traded on a securities exchange)

2) Level 2-inputs other than unadjusted quoted prices that are observable for the asset or liability (such as unadjusted quoted prices for similar assets and market corroborated inputs such as interest rates, prepayment speeds, credit risks, etc.)

3) Level 3-significant unobservable inputs (including the Manager’s own judgments about assumptions that market participants would use in pricing the asset or liability).

The inputs used for valuing securities are not necessarily an indication of the risks associated with investing in those securities.

The table below categorizes amounts that are included in the Fund’s Statement of Assets and Liabilities as of September 30, 2013 based on valuation input level:


	Level 1— Unadjusted Quoted Prices		Level 2— Other Significant Observable Inputs		Level 3— Significant Unobservable Inputs		Value

Assets Table
Investments, at Value:
Municipal Bonds and Notes
Minnesota	$	—	$	135,384,861	$	—	$	135,384,861
U.S. Possessions		—		3,635,785		—		3,635,785

Total Investments, at Value	$	—	$	139,020,646	$	—	$	139,020,646

Currency contracts and forwards, if any, are reported at their unrealized appreciation/ depreciation at measurement date, which represents the change in the contract’s value from trade date. Futures, if any, are reported at their variation margin at measurement date, which represents the amount due to/from the Fund at that date. All additional assets and liabilities included in the above table are reported at their market value at measurement date.

3. Shares of Beneficial Interest

The Fund has authorized an unlimited number of $0.001 par value shares of beneficial interest of each class. Transactions in shares of beneficial interest were as follows:

49 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

3. Shares of Beneficial Interest (Continued)


	Six Months Ended September 30, 2013				Year Ended March 28, 2013
	Shares		Amount		Shares		Amount

Class A
Sold		635,310	$	8,037,431		3,153,426	$	41,344,411
Dividends and/or distributions reinvested		143,758		1,794,430		260,581		3,414,444
Redeemed		(1,709,842)		(21,170,765)		(950,639)		(12,504,630)

Net increase (decrease)		(930,774)	$	(11,338,904)		2,463,368	$	32,254,225



Class B
Sold		—	$	—		27,551	$	354,812
Dividends and/or distributions reinvested		3,823		47,672		8,656		113,203
Redeemed		(39,762)		(496,378)		(21,077)		(277,506)

Net increase (decrease)		(35,939)	$	(448,706)		15,130	$	190,509



Class C
Sold		192,149	$	2,483,913		1,145,170	$	14,969,250
Dividends and/or distributions reinvested		37,371		465,878		67,081		878,175
Redeemed		(586,633)		(7,217,645)		(295,583)		(3,863,429)

Net increase (decrease)		(357,113)	$	(4,267,854)		916,668	$	11,983,996



Class Y
Sold		129,607	$	1,653,172		230,760	$	3,031,015
Dividends and/or distributions reinvested		5,531		68,706		6,092		79,981
Redeemed		(77,857)		(967,544)		(79,879)		(1,047,905)

Net increase		57,281	$	754,334		156,973	$	2,063,091

4. Purchases and Sales of Securities

The aggregate cost of purchases and proceeds from sales of securities, other than short-term obligations, for the six months ended September 30, 2013 were as follows:


	Purchases		Sales

Investment securities		$15,954,578		$23,585,831

5. Fees and Other Transactions with Affiliates

Management Fees. Under the investment advisory agreement, the Fund pays the Manager a management fee based on the daily net assets of the Fund at an annual rate as shown in the following table:

50 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

5. Fees and Other Transactions with Affiliates (Continued)


Fee Schedule
Up to $500 million			0.55%
Next $500 million			0.50
Next $500 million			0.45
Over $1.5 billion			0.40

Sub-Adviser Fees. The Manager has retained the Sub-Adviser to provide the day-to-day portfolio management of the Fund. Under the Sub-Advisory Agreement, the Manager pays the Sub-Adviser an annual fee in monthly installments, equal to a percentage of the investment management fee collected by the Manager from the Fund, which shall be calculated after any investment management fee waivers. The fee paid to the Sub-Adviser is paid by the Manager, not by the Fund.

Transfer Agent Fees. OFI Global (the “Transfer Agent”) serves as the transfer and shareholder servicing agent for the Fund. Fees incurred by the Fund with respect to these services are detailed in the Statement of Operations.

Sub-Transfer Agent Fees. The Transfer Agent has retained Shareholder Services, Inc., a wholly-owned subsidiary of OFI (the “Sub-Transfer Agent”), to provide the day-to-day transfer agent and shareholder servicing of the Fund. Under the Sub-Transfer Agency Agreement, the Transfer Agent pays the Sub-Transfer Agent an annual fee in monthly installments, equal to a percentage of the transfer agent fee collected by the Transfer Agent from the Fund, which shall be calculated after any applicable fee waivers. The fee paid to the Sub-Transfer Agent is paid by the Transfer Agent, not by the Fund.

Distribution and Service Plan (12b-1) Fees. Under its General Distributor’s Agreement with the Fund, OppenheimerFunds Distributor, Inc. (the “Distributor”) acts as the Fund’s principal underwriter in the continuous public offering of the Fund’s classes of shares.

Service Plan for Class A Shares. The Fund has adopted a Service Plan (the “Plan”) for Class A shares under Rule 12b-1 of the Investment Company Act of 1940. Under the Plan, the Fund reimburses the Distributor for a portion of its costs incurred for services provided to accounts that hold Class A shares. Reimbursement is made periodically at an annual rate of up to 0.25% of the daily net assets of Class A shares of the Fund. The Distributor currently uses all of those fees to pay dealers, brokers, banks and other financial institutions periodically for providing personal service and maintenance of accounts of their customers that hold Class A shares. Any unreimbursed expenses the Distributor incurs with respect to Class A shares in any fiscal year cannot be recovered in subsequent periods. Fees incurred by the Fund under the Plan are detailed in the Statement of Operations.

51 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

5. Fees and Other Transactions with Affiliates (Continued)

Distribution and Service Plans for Class B and Class C Shares. The Fund has adopted Distribution and Service Plans (the “Plans”) for Class B and Class C shares under Rule 12b-1 of the Investment Company Act of 1940 to compensate the Distributor for its services in connection with the distribution of those shares and servicing accounts. Under the Plans, the Fund pays the Distributor an annual asset-based sales charge of 0.75% on Class B and Class C shares daily net assets. The Distributor also receives a service fee of 0.25% per year under each plan. If either the Class B or Class C plan is terminated by the Fund or by the shareholders of a class, the Board of Trustees and its independent trustees must determine whether the Distributor shall be entitled to payment from the Fund of all or a portion of the service fee and/or asset-based sales charge in respect to shares sold prior to the effective date of such termination. Fees incurred by the Fund under the Plans are detailed in the Statement of Operations. The Distributor determines its uncompensated expenses under the Plans at calendar quarter ends. The Distributor’s aggregate uncompensated expenses under the Plans at September 30, 2013 were as follows:


Class B	$	75,321
Class C		419,544

Sales Charges. Front-end sales charges and contingent deferred sales charges (“CDSC”) do not represent expenses of the Fund. They are deducted from the proceeds of sales of Fund shares prior to investment or from redemption proceeds prior to remittance, as applicable. The sales charges retained by the Distributor from the sale of shares and the CDSC retained by the Distributor on the redemption of shares is shown in the following table for the period indicated.


Six Months Ended	Class A Front-End Sales Charges Retained by Distributor		Class A Contingent Deferred Sales Charges Retained by Distributor		Class B Contingent Deferred Sales Charges Retained by Distributor		Class C Contingent Deferred Sales Charges Retained by Distributor

September 30, 2013		$19,424		$197		$4,009		$3,291

Waivers and Reimbursements of Expenses. The Manager has voluntarily agreed to waive management fees and/or reimburse the Fund for certain expenses so that “Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses”, excluding interest and fees from borrowings and interest and related expenses from inverse floaters, would not exceed 0.80% of average annual net assets for Class A shares, 1.55% of average annual net assets for both Class B and Class C shares and 0.80% of average annual net assets for Class Y shares. During the six months ended September 30, 2013, the Manager reimbursed $73,011, $3,106, $28,532 and $7 for Class A, Class B, Class C and Class Y shares, respectively

The Transfer Agent has voluntarily agreed to limit transfer and shareholder servicing agent fees for Classes B, C, and Y shares to 0.35% of average annual net assets per class and for Class A shares to 0.30% of average annual net assets of the class.

52 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

5. Fees and Other Transactions with Affiliates (Continued)

Some of these undertakings may be modified or terminated at any time; some may not be modified or terminated until after one year from the date of the current prospectus, as indicated therein.

6. Borrowings

The Fund can borrow money from banks in amounts up to one third of its total assets (including the amount borrowed) less all liabilities and indebtedness other than borrowings (meaning that the value of those assets must be at least 300% of the amount borrowed). The Fund can use those borrowings for investment-related purposes such as purchasing portfolio securities. The Fund also may borrow to meet redemption obligations or for temporary and emergency purposes. When the Fund invests borrowed money in portfolio securities, it is using a speculative investment technique known as leverage and changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow because of the effect of leverage.

The Fund can also use the borrowings for other investment-related purposes, including in connection with the Fund’s inverse floater investments as discussed in Note 1. The Fund may use the borrowings to reduce the leverage amount of, or unwind or “collapse” trusts that issued “inverse floaters” owned by the Fund, or in circumstances in which the Fund has entered into a shortfall and forbearance agreement with the sponsor of the inverse floater trust to meet the Fund’s obligation to reimburse the sponsor of the inverse floater for the difference between the liquidation value of the underlying bond and the amount due to holders of the short-term floating rate notes issued by the Trust. See the discussion in Note 1 (Inverse Floating Rate Securities) for additional information.

The Fund will pay interest and may pay other fees in connection with loans. If the Fund does borrow, it will be subject to greater expenses than funds that do not borrow. The interest on borrowed money and the other fees incurred in conjunction with loans are an expense that might reduce the Fund’s yield and return. Expenses incurred by the Fund with respect to interest on borrowings and commitment fees are disclosed separately or as other expenses on the Statement of Operations.

The Fund entered into a Revolving Credit and Security Agreement (the “Agreement”) with conduit lenders and Citibank N.A. which enables it to participate with certain other Oppenheimer funds in a committed, secured borrowing facility that permits borrowings of up to $2.0 billion, collectively, by the Oppenheimer Rochester Funds. To secure the loan, the Fund pledges investment securities in accordance with the terms of the Agreement. Securities held in collateralized accounts to cover these borrowings are noted in the Statement of Investments. Interest is charged to the Fund, based on its borrowings, at current commercial paper issuance rates (0.1657% as of September 30, 2013). The Fund pays additional fees annually to its lender on its outstanding borrowings to manage and administer the facility and is allocated its pro-rata share of an annual structuring fee and ongoing commitment fees both of which are based on the total facility size. Total fees and interest that are included in expenses on the Fund’s Statement of Operations related to its participation in the borrowing facility during the six months ended September 30, 2013 equal 0.08% of the Fund’s average

53 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

6. Borrowings (Continued)

net assets on an annualized basis. The Fund has the right to prepay such loans and terminate its participation in the conduit loan facility at any time upon prior notice.

As of September 30, 2013, the Fund had borrowings outstanding at an interest rate of 0.1657%. Details of the borrowings for the six months ended September 30, 2013are as follows:


Average Daily Loan Balance	$	5,574,317
Average Daily Interest Rate		0.174	%
Fees Paid	$	22,818
Interest Paid	$	3,649

7. Reverse Repurchase Agreements

The Fund may engage in reverse repurchase agreements. A reverse repurchase agreement is the sale of one or more securities to a counterparty at an agreed-upon purchase price with the simultaneous agreement to repurchase those securities on a future date at a higher repurchase price. The repurchase price represents the repayment of the purchase price and interest accrued thereon over the term of the repurchase agreement. The cash received by the Fund in connection with a reverse repurchase agreement may be used for investment-related purposes such as purchasing portfolio securities or for other purposes such as those described in the preceding “Borrowings” note.

The Fund entered into a Committed Repurchase Transaction Facility (the “Facility”) with J.P. Morgan Securities LLC (the “counterparty’) which enables it to participate with certain other Oppenheimer funds in a committed reverse repurchase agreement facility that permits aggregate outstanding reverse repurchase agreements of up to $750 million, collectively. Interest is charged to the Fund on the purchase price of outstanding reverse repurchase agreements at current LIBOR rates plus an applicable spread. The Fund is also allocated its pro-rata share of an annual structuring fee based on the total Facility size and ongoing commitment fees based on the total unused amount of the Facility. The Fund retains the economic exposure to fluctuations in the value of securities subject to reverse repurchase agreements under the Facility and therefore these transactions are considered secured borrowings for financial reporting purposes. The Fund also continues to receive the economic benefit of interest payments received on securities subject to reverse repurchase agreements, in the form of a direct payment from the counterparty. These payments are included in interest income on the Statement of Operations. Total fees and interest related to the Fund’s participation in the Facility during the six months ended September 30, 2013 are included in expenses on the Fund’s Statement of Operations and equal 0.01% of the Fund’s average net assets on an annualized basis.

The securities subject to reverse repurchase agreements under the Facility are valued on a daily basis. To the extent this value, after adjusting for certain margin requirements of the Facility, exceeds the cash proceeds received, the Fund may request the counterparty to return securities equal in margin value to this excess. To the extent that the cash proceeds received exceed the margin value of the securities subject to the transaction, the counterparty may request additional securities from the Fund. The Fund has the right to declare the first or fifteenth day of any calendar month as the repurchase date for any outstanding reverse

54 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

7. Reverse Repurchase Agreements (Continued)

repurchase agreement upon delivery of advanced notification and may also recall any security subject to such a transaction by substituting eligible securities of equal or greater margin value according to the Facility’s terms.

The Fund executed no transactions under the Facility during the six months ended September 30, 2013.

Details of reverse repurchase agreement transactions for the six months ended September 30, 2013 are as follows:


Fees Paid			$11,691

8. Pending Litigation

Since 2009, seven class action lawsuits have been pending in the U.S. District Court for the District of Colorado against OppenheimerFunds, Inc. (“OFI”), OppenheimerFunds Distributor, Inc., the Fund’s principal underwriter and distributor (the “Distributor”), and certain funds – including the Fund – advised by OFI Global Asset Management, Inc. and distributed by the Distributor (the “Defendant Funds”). The lawsuits also name as defendants certain officers and current and former trustees of the respective Defendant Funds. The lawsuits raise claims under federal securities law and allege, among other things, that the disclosure documents of the respective Defendant Funds contained misrepresentations and omissions and that the respective Defendant Funds’ investment policies were not followed. The plaintiffs in these actions seek unspecified damages, equitable relief and awards of attorneys’ fees and litigation expenses. The Defendant Funds’ Boards of Trustees have also engaged counsel to represent the Funds and the present and former Independent Trustees named in those suits. On August 26, 2013, the parties – including the Fund – in six of these lawsuits executed a memorandum of understanding setting forth the terms of proposed settlements of those actions. The proposed settlements are subject to a variety of contingencies, including the execution of settlement agreements, which will require preliminary and final approval by the court. The proposed settlements do not resolve a seventh outstanding lawsuit relating to Oppenheimer California Municipal Fund.

Other class action and individual lawsuits have been filed since 2008 in various state and federal courts against the Manager and certain of its affiliates by investors seeking to recover investments they allegedly lost as a result of the “Ponzi” scheme run by Bernard L. Madoff and his firm, Bernard L. Madoff Investment Securities, LLC (“BLMIS”). Plaintiffs in these suits allege that they suffered losses as a result of their investments in several funds managed by an affiliate of OFI and assert a variety of claims, including breach of fiduciary duty, fraud, negligent misrepresentation, unjust enrichment, and violation of federal and state securities laws and regulations, among others. They seek unspecified damages, equitable relief and awards of attorneys’ fees and litigation expenses. Neither the Distributor, nor any of the Oppenheimer mutual funds, their independent trustees or directors are named as defendants in these lawsuits. None of the Oppenheimer mutual funds invested in any funds or accounts managed by Madoff or BLMIS. On February 28, 2011, a stipulation of partial settlement of three groups of consolidated putative class action lawsuits relating to these matters was filed in the U.S. District Court for the Southern District of New York. On August 19, 2011, the court entered an order and final judgment approving the settlement as fair, reasonable and

55 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		NOTES TO FINANCIAL STATEMENTS Unaudited / Continued

8. Pending Litigation (Continued)

adequate. In September 2011, certain parties filed notices of appeal from the court’s order approving the settlement. The settlement does not resolve other outstanding lawsuits against OFI and its affiliates relating to BLMIS.

On April 16, 2010, a lawsuit was filed in New York state court against (i) OFI, (ii) an affiliate of OFI and A(iii) AArdvark IV Funding Limited (“AAArdvark IV”), an entity advised by OFI’s affiliate, in connection with investments made by the plaintiffs in AAArdvark IV. Plaintiffs allege breach of contract and common law fraud claims against the defendants and seek compensatory damages, costs and disbursements, including attorney fees. On April 11, 2013, the court granted defendants’ motion for summary judgment, dismissing plaintiffs’ fraud claim with prejudice and dismissing their contract claim without prejudice, and granted plaintiffs leave to replead their contract claim to assert a cause of action for specific performance within 30 days. On May 9, 2013, plaintiffs filed a notice of appeal from the court’s dismissal order. On July 15, 2011, a lawsuit was filed in New York state court against OFI, an affiliate of OFI and AAArdvark Funding Limited (“AAArdvark I”), an entity advised by OFI’s affiliate, in connection with investments made by the plaintiffs in AAArdvark I. The complaint alleges breach of contract and common law fraud claims against the defendants and seeks compensatory damages, costs and disbursements, including attorney fees. On November 9, 2011, a lawsuit was filed in New York state court against OFI, an affiliate of OFI and AAArdvark XS Funding Limited (“AAArdvark XS”), an entity advised by OFI’s affiliate, in connection with investments made by the plaintiffs in AAArdvark XS. The complaint alleges breach of contract against the defendants and seeks compensatory damages, costs and disbursements, including attorney fees.

OFI believes the lawsuits and appeals described above are without legal merit and, with the exception of actions it has settled, is defending against them vigorously. While it is premature to render any opinion as to the outcome in these lawsuits, or whether any costs that the Defendant Funds may bear in defending the suits might not be reimbursed by insurance, OFI believes that these suits should not impair the ability of OFI or the Distributor to perform their respective duties to the Fund, and that the outcome of all of the suits together should not have any material effect on the operations of any of the Oppenheimer mutual funds.

56 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		BOARD APPROVAL OF THE FUND’S INVESTMENT ADVISORY AGREEMENT Unaudited

The Fund has entered into an investment advisory agreement with OFI Global Asset Management, Inc. (“OFI Global” or the “Adviser”), a wholly-owned subsidiary of OppenheimerFunds, Inc. (“OFI” or the “Sub-Adviser”) (“OFI Global” and “OFI” together the “Managers”) and OFI Global has entered into a sub-advisory agreement with OFI whereby OFI provides investment sub-advisory services to the Fund (collectively, the “Agreements”). Each year, the Board of Trustees (the “Board”), including a majority of the independent Trustees, is required to determine whether to renew the Agreements. The Investment Company Act of 1940, as amended, requires that the Board request and evaluate, and that the Managers provide, such information as may be reasonably necessary to evaluate the terms of the Agreements. The Board employs an independent consultant to prepare a report that provides information, including comparative information that the Board requests for that purpose. In addition to in-person meetings focused on this evaluation, the Board receives information throughout the year regarding Fund services, fees, expenses and performance.

The Adviser, Sub-Adviser and the independent consultant provided information to the Board on the following factors: (i) the nature, quality and extent of the Managers’ services, (ii) the investment performance of the Fund and the Managers, (iii) the fees and expenses of the Fund, including comparative expense information, (iv) the profitability of the Managers and their affiliates, including an analysis of the cost of providing services, (v) whether economies of scale are realized as the Fund grows and whether fee levels reflect these economies of scale for Fund investors and (vi) other benefits to the Managers from their relationship with the Fund. The Board was aware that there are alternatives to retaining the Managers.

Outlined below is a summary of the principal information considered by the Board as well as the Board’s conclusions.

Nature, Quality and Extent of Services. The Board considered information about the nature, quality and extent of the services provided to the Fund and information regarding the Managers’ key personnel who provide such services. The Sub-Adviser’s duties include providing the Fund with the services of the portfolio managers and the Sub-Adviser’s investment team, who provide research, analysis and other advisory services in regard to the Fund’s investments; securities trading services; oversight of third-party service providers; monitoring compliance with applicable Fund policies and procedures and adherence to the Fund’s investment restrictions; and risk management. The Managers are responsible for providing certain administrative services to the Fund as well. Those services include providing and supervising all administrative and clerical personnel who are necessary in order to provide effective corporate administration for the Fund; compiling and maintaining records with respect to the Fund’s operations; preparing and filing reports required by the Securities and Exchange Commission; preparing periodic reports regarding the operations of the Fund for its shareholders; preparing proxy materials for shareholder meetings; and preparing the registration statements required by Federal and state securities laws for the sale of the Fund’s shares. The Managers also provide the Fund with office space, facilities and equipment.

The Board also considered the quality of the services provided and the quality of the Managers’ resources that are available to the Fund. The Board took account of the fact that the Sub-Adviser has had over fifty years of experience as an investment adviser and that its assets under management rank it among the top mutual fund managers in the United States. The Board evaluated the Sub-Adviser’s advisory, administrative, accounting, legal,

57 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		BOARD APPROVAL OF THE FUND’S INVESTMENT ADVISORY AGREEMENT Unaudited / Continued

compliance services and risk management, and information the Board has received regarding the experience and professional qualifications of the Managers’ key personnel and the size and functions of its staff. In its evaluation of the quality of the portfolio management services provided, the Board considered the experience of Daniel Loughran, Scott Cottier, Troy Willis, Mark DeMitry, Michael Camarella, Charles Pulire, and Elizabeth Mossow, the portfolio managers for the Fund, and the Sub-Adviser’s investment team and analysts. The Board members also considered the totality of their experiences with the Managers as directors or trustees of the Fund and other funds advised by the Managers. The Board considered information regarding the quality of services provided by affiliates of the Managers, which its members have become knowledgeable about in connection with the renewal of the Fund’s service agreements. The Board concluded, in light of the Managers’ experience, reputation, personnel, operations and resources that the Fund benefits from the services provided under the Agreement.

Investment Performance of the Fund, the Adviser and the Sub-Adviser. Throughout the year, the Adviser and the Sub-Adviser provided information on the investment performance of the Fund, the Adviser and the Sub-Adviser, including comparative performance information. The Board also reviewed information, prepared by the Adviser, the Sub-Adviser and the independent consultant, comparing the Fund’s historical performance to its benchmarks and to the performance of other retail muni Minnesota funds. The Board noted that the Fund’s one-year, three-year, and five-year performance was better than its category median.

Costs of Services by the Adviser. The Board reviewed the fees paid to the Adviser and the other expenses borne by the Fund. The Board also considered the comparability of the fees charged and the services provided to the Fund to the fees and services for other clients or accounts advised by the Adviser. The independent consultant provided comparative data in regard to the fees and expenses of the Fund and other retail front-end load muni Minnesota funds with comparable asset levels and distribution features. After discussions with the Board, the Adviser has agreed to contractually waive fees and/or reimburse the Fund for certain expenses in order to limit “Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement” (excluding (i) interest and fees from borrowing, interest and related expenses from inverse floaters, taxes, dividends tied to short sales, brokerage commissions, and other expenditures which are capitalized in accordance with generally accepted accounting principles; (ii) expenses incurred directly or indirectly by the Fund as a result of investments in other investment companies, wholly-owned subsidiaries and pooled investment vehicles; (iii) certain other expenses attributable to, and incurred as a result of, a Fund’s investments; and (iv) other extraordinary expenses (including litigation expenses) not incurred in the ordinary course of the Fund’s business) to annual rates of 0.80% for Class A shares, 1.55% for Class B and Class C shares, and 0.80% for Class Y shares, as calculated on the daily net assets of the Fund. This fee waiver and/or expense reimbursement may not be amended or withdrawn for one year from the date of prospectus. The Fund’s total expenses were lower than its peer group median and category median. The Fund’s contractual management fees were equal to its peer group median and higher than its category median.

58 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

Economies of Scale and Profits Realized by the Adviser and Sub-Adviser. The Board considered information regarding the Managers’ costs in serving as the Fund’s investment adviser and sub-adviser, including the costs associated with the personnel and systems necessary to manage the Fund, and information regarding the Managers’ profitability from their relationship with the Fund. The Board reviewed whether the Managers may realize economies of scale in managing and supporting the Fund. The Board noted that the Fund currently has management fee breakpoints, which are intended to share with Fund shareholders economies of scale that may exist as the Fund’s assets grow.

Other Benefits to the Managers. In addition to considering the profits realized by the Managers, the Board considered information that was provided regarding the direct and indirect benefits the Managers receive as a result of their relationship with the Fund, including compensation paid to the Managers’ affiliates. The Board also considered that the Managers must be able to pay and retain experienced professional personnel at competitive rates to provide quality services to the Fund.

Conclusions. These factors were also considered by the independent Trustees meeting separately from the full Board, assisted by experienced counsel to the Fund and to the independent Trustees. Fund counsel and the independent Trustees’ counsel are independent of the Managers within the meaning and intent of the Securities and Exchange Commission Rules.

Based on its review of the information it received and its evaluations described above, the Board, including a majority of the independent Trustees, decided to continue the Agreements through September 30, 2014. In arriving at its decision, the Board did not identify any factor or factors as being more important than others, but considered all of the above information, and considered the terms and conditions of the Agreements, including the management fees, in light of all the surrounding circumstances.

59 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		SPECIAL SHAREHOLDER MEETING Unaudited

On June 21, 2013, a first shareholder meeting of Oppenheimer Rochester Minnesota Municipal Fund (the “Fund”) was held at which the twelve Trustees identified below were elected to the Fund (Proposal No. 1) as described in the Fund’s proxy statement dated April 12, 2013 (the “Proxy Statement”). The following is a report of the votes cast:


Nominee/Proposal	For		Withheld
Trustees

Brian F. Wruble		9,738,121		251,259
David K. Downes		9,763,079		227,302
Matthew P. Fink		9,745,120		244,260
Edmund Giambastiani, Jr.		9,807,716		181,665
Phillip A. Griffiths		9,681,227		308,154
Mary F. Miller		9,762,857		226,524
Joel W. Motley		9,819,587		169,794
Joanne Pace		9,814,353		175,028
Mary Ann Tynan		9,749,233		240,148
Joseph M. Wikler		9,732,688		256,693
Peter I. Wold		9,796,357		193,023
William F. Glavin, Jr.		9,794,525		194,856

On August 2, 2013, following an adjournment from a second shareholder meeting held on June 21, 2013, a meeting of the Fund was held at which the sub-proposals below (Proposal No. 2 (including all of its sub-proposals)) and an Agreement and Plan of Reorganization to reorganize the Fund into a Delaware statutory trust (Proposal No. 3) were approved as described in the Fund’s Proxy Statement. The following is a report of the votes cast:

2a: Proposal to revise the fundamental policy relating to borrowing


For	Against	Abstain
4,823,188	371,368	1,003,700

2b-1: Proposal to revise the fundamental policy relating to concentration of investments


For	Against	Abstain
4,813,936	376,869	1,007,451

2d: Proposal to revise the fundamental policy relating to lending


For	Against	Abstain
4,838,520	375,798	983,935

2e: Proposal to remove the additional fundamental policy relating to estate and commodities


For	Against	Abstain
4,807,782	419,921	970,552

2f: Proposal to revise the fundamental policy relating to senior securities


For	Against	Abstain
4,799,750	378,112	1,020,394

2g: Proposal to remove the additional fundamental policy relating to underwriting


For	Against	Abstain
4,804,003	385,256	1,008,996

60 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

2h: Proposal to revise the fundamental policy relating to tax-free securities


For	Against	Abstain
4,811,298	411,585	975,373

2r: Proposal to convert the Fund’s investment objective from fundamental to non-fundamental


For	Against	Abstain
4,720,265	447,906	1,030,084

2s: Proposal to approve a change in the Fund’s investment objective


For	Against	Abstain
4,704,820	487,493	1,005,941

Proposal 3: To approve an Agreement and Plan of Reorganization that provides for the reorganization of a Fund from a Maryland corporation or Massachusetts business trust, as applicable, into a Delaware statutory trust.


For	Against	Abstain
4,926,849	258,206	1,013,201

61 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		PORTFOLIO PROXY VOTING POLICIES AND PROCEDURES; UPDATES TO STATEMENTS OF INVESTMENTS Unaudited

The Fund has adopted Portfolio Proxy Voting Policies and Procedures under which the Fund votes proxies relating to securities (“portfolio proxies”) held by the Fund. A description of the Fund’s Portfolio Proxy Voting Policies and Procedures is available (i) without charge, upon request, by calling the Fund toll-free at 1.800.CALL OPP (225.5677), (ii) on the Fund’s website at oppenheimerfunds.com, and (iii) on the SEC’s website at www.sec.gov. In addition, the Fund is required to file Form N-PX, with its complete proxy voting record for the 12 months ended June 30th, no later than August 31st of each year. The Fund’s voting record is available (i) without charge, upon request, by calling the Fund toll-free at 1.800.CALL OPP (225.5677), and (ii) in the Form N-PX filing on the SEC’s website at www.sec.gov.

The Fund files its complete schedule of portfolio holdings with the SEC for the first quarter and the third quarter of each fiscal year on Form N-Q. The Fund’s Form N-Q filings are available on the SEC’s website at www.sec.gov. Those forms may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330.

Householding—Delivery of Shareholder Documents

This is to inform you about OppenheimerFunds’ “householding” policy. If more than one member of your household maintains an account in a particular fund, OppenheimerFunds will mail only one copy of the fund’s prospectus (or, if available, the fund’s summary prospectus), annual and semiannual report and privacy policy. The consolidation of these mailings, called householding, benefits your fund through reduced mailing expense, and benefits you by reducing the volume of mail you receive from OppenheimerFunds. Householding does not affect the delivery of your account statements.

Please note that we will continue to household these mailings for as long as you remain an OppenheimerFunds shareholder, unless you request otherwise. If you prefer to receive multiple copies of these materials, please call us at 1.800.CALL-OPP (225-5677). You may also notify us in writing or via email. We will begin sending you individual copies of the prospectus (or, if available, the summary prospectus), reports and privacy policy within 30 days of receiving your request to stop householding.

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		OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND


Trustees and Officers		Brian F. Wruble, Chairman of the Board of Trustees and Trustee
		David K. Downes, Trustee
		Matthew P. Fink, Trustee
		Edmund P. Giambastiani, Jr., Trustee
		Phillip A. Griffiths, Trustee
		Mary F. Miller, Trustee
		Joel W. Motley, Trustee
		Joanne Pace, Trustee
		Mary Ann Tynan, Trustee
		Joseph M. Wikler, Trustee
		Peter I. Wold, Trustee
		William F. Glavin, Jr., Trustee, President and Principal Executive Officer
		Daniel G. Loughran, Vice President
		Scott S. Cottier, Vice President
		Troy E. Willis, Vice President
		Mark R. DeMitry, Vice President
		Michael L. Camarella, Vice President
		Charles S. Pulire, Vice President
		Richard A. Stein, Vice President
		Arthur S. Gabinet, Secretary and Chief Legal Officer
		Christina M. Nasta, Vice President and Chief Business Officer
		Mark S. Vandehey, Vice President and Chief Compliance Officer
		Brian W. Wixted, Treasurer and Principal Financial & Accounting Officer

Manager		OFI Global Asset Management, Inc.

Sub-Adviser		OppenheimerFunds, Inc.

Distributor		OppenheimerFunds Distributor, Inc.

Transfer and Shareholder Servicing Agent		OFI Global Asset Management, Inc.

Sub-Transfer Agent		Shareholder Services, Inc. DBA OppenheimerFunds Services

Independent Registered Public Accounting Firm		KPMGLLP

Legal Counsel		Kramer Levin Naftalis & Frankel LLP

		The financial statements included herein have been taken from the records of the Fund without examination of those records by the independent registered public accounting firm.

63 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND



		PRIVACY POLICY NOTICE

As an Oppenheimer fund shareholder, you are entitled to know how we protect your personal information and how we limit its disclosure.

Information Sources

We obtain nonpublic personal information about our shareholders from the following sources:

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Applications or other forms

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When you create a user ID and password for online account access

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When you enroll in eDocs Direct, our electronic document delivery service

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Your transactions with us, our affiliates or others

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A software program on our website, often referred to as a “cookie,” which indicates which parts of our site you’ve visited

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When you set up challenge questions to reset your password online

If you visit oppenheimerfunds.com and do not log on to the secure account information areas, we do not obtain any personal information about you. When you do log on to a secure area, we do obtain your user ID and password to identify you. We also use this information to provide you with products and services you have requested, to inform you about products and services that you may be interested in and assist you in other ways.

We do not collect personal information through our website unless you willingly provide it to us, either directly by email or in those areas of the website that request information. In order to update your personal information (including your mailing address, email address and phone number) you must first log on and visit your user profile.

If you have set your browser to warn you before accepting cookies, you will receive the warning message with each cookie. You can refuse cookies by turning them off in your browser. However, doing so may limit your access to certain sections of our website.

We use cookies to help us improve and manage our website. For example, cookies help us recognize new versus repeat visitors to the site, track the pages visited, and enable some special features on the website. This data helps us provide a better service for our website visitors.

Protection of Information

We do not disclose any non-public personal information (such as names on a customer list) about current or former customers to anyone, except as permitted by law.

Disclosure of Information

We send your financial advisor (as designated by you) copies of confirmations, account statements and other documents reporting activity in your fund accounts. We may also use details about you and your investments to help us, our financial service affiliates, or firms that jointly market their financial products and services with ours, to better serve your investment needs or suggest financial services or educational material that may be of interest to you. If this requires us to provide you with an opportunity to “opt in” or “opt out” of such information sharing with a firm not affiliated with us, you will receive notification on how to do so, before any such sharing takes place.

Right of Refusal

We will not disclose your personal information to unaffiliated third parties (except as permitted by law), unless we first offer you a reasonable opportunity to refuse or “opt out” of such disclosure.

64 OPPENHEIMER ROCHESTER MINNESOTA MUNICIPAL FUND

Internet Security and Encryption

In general, the email services provided by our website are encrypted and provide a secure and private means of communication with us. To protect your own privacy, confidential and/or personal information should only be communicated via email when you are advised that you are using a secure website. As a security measure, we do not include personal or account information in non-secure emails, and we advise you not to send such information to us in non-secure emails. Instead, you may take advantage of the secure features of our website to encrypt your email correspondence. To do this, you will need to use a browser that supports Secure Sockets Layer (SSL) protocol.

We do not guarantee or warrant that any part of our website, including files available for download, are free of viruses or other harmful code. It is your responsibility to take appropriate precautions, such as use of an anti-virus software package, to protect your computer hardware and software.

—

All transactions, including redemptions, exchanges and purchases, are secured by SSL and 128-bit encryption. SSL is used to establish a secure connection between your PC and OppenheimerFunds’ server. It transmits information in an encrypted and scrambled format.

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Encryption is achieved through an electronic scrambling technology that uses a “key” to code and then decode the data. Encryption acts like the cable converter box you may have on your television set. It scrambles data with a secret code so that no one can make sense of it while it is being transmitted. When the data reaches its destination, the same software unscrambles the data.

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You can exit the secure area by either closing your browser, or for added security, you can use the Log Out button before you close your browser.

Other Security Measures

We maintain physical, electronic and procedural safeguards to protect your personal account information. Our employees and agents have access to that information only so that they may offer you products or provide services, for example, when responding to your account questions.

How You Can Help

You can also do your part to keep your account information private and to prevent unauthorized transactions. If you obtain a user ID and password for your account, do not allow it to be used by anyone else. Also, take special precautions when accessing your account on a computer used by others.

Who We Are

This joint notice describes the privacy policies of the Oppenheimer funds, OppenheimerFunds, Inc., and each of its financial institution subsidiaries, the trustee of OppenheimerFunds Individual Retirement Accounts (IRAs) and the custodian of the OppenheimerFunds 403(b)(7) tax sheltered custodial accounts. It applies to all Oppenheimer fund accounts you presently have, or may open in the future, using your Social Security number—whether or not you remain a shareholder of our funds. This notice was last updated November 2012. In the event it is updated or changed, we will post an updated notice on our website at oppenheimerfunds.com. If you have any questions about these privacy policies, write to us at P.O. Box 5270, Denver, CO 80217-5270, email us by clicking on the Contact Us section of our website at oppenheimerfunds.com or call us at 1.800.CALL OPP (225.5677).

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LOGO

Item 2. Code of Ethics.

Not applicable to semiannual reports.

Item 3. Audit Committee Financial Expert.

Not applicable to semiannual reports.

Item 4. Principal Accountant Fees and Services.

Not applicable to semiannual reports.

Item 5. Audit Committee of Listed Registrants

Not applicable.

Item 6. Schedule of Investments.

a) Not applicable. The complete schedule of investments is included in Item 1 of this Form N-CSR.

b) Not applicable.

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Not applicable.

Item 8. Portfolio Managers of Closed-End Management Investment Companies.

Not applicable.

Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders.

The Fund’s Governance Committee Provisions with Respect to Nominations of Directors/Trustees to the Respective Boards

None

Item 11. Controls and Procedures.

Based on their evaluation of the registrant’s disclosure controls and procedures (as defined in rule 30a-3(c) under the Investment Company Act of 1940 (17 CFR 270.30a-3(c)) as of 9/30/2013, the registrant’s principal executive officer and principal financial officer found the registrant’s disclosure controls and procedures to provide reasonable assurances that information required to be disclosed by the registrant in the reports that it files under the Securities Exchange Act of 1934 (a) is accumulated and communicated to registrant’s management, including its principal executive officer and principal financial officer, to allow timely decisions regarding required disclosure, and (b) is recorded, processed, summarized and reported, within the time periods specified in the rules and forms adopted by the U.S. Securities and Exchange Commission.

There have been no changes in the registrant’s internal controls over financial reporting that occurred during the registrant’s second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 12. Exhibits.

(a)

(1)

Not applicable to semiannual reports.

(2)

Exhibits attached hereto.

(3)

Not applicable.

(b)	Exhibit attached hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Oppenheimer Rochester Minnesota Municipal Fund


By:		/s/ William F. Glavin, Jr.
		William F. Glavin, Jr.
		Principal Executive Officer

Date:		11/11/2013

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.


By:		/s/ William F. Glavin, Jr.
		William F. Glavin, Jr.
		Principal Executive Officer

Date:		11/11/2013

By:		/s/ Brian W. Wixted
		Brian W. Wixted
		Principal Financial Officer

Date:		11/11/2013

Oppenheimer Municipal Fund N-CSRSCertified semi-annual shareholder report (management investment company)