(Oppenheimer Rochester® Short Term Municipal Fund)

Investment Objective. The Fund seeks tax-free income.

Fees and Expenses of the Fund. This table describes the fees and expenses that you may pay if you buy and hold or redeem shares of the Fund. You may qualify for sales charge discounts if you (or you and your spouse) invest, or agree to invest in the future, at least $100,000 in certain funds in the Oppenheimer family of funds. More information about these and other discounts is available from your financial professional and in the section "About Your Account" beginning on page 14 of the prospectus and in the sections "How to Buy Shares" beginning on page 44 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (Oppenheimer Rochester® Short Term Municipal Fund)	Class A	Class C	Class Y
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	2.25%	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of the original offering price or redemption proceeds)	none	1.00%	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

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Annual Fund Operating Expenses - (Oppenheimer Rochester® Short Term Municipal Fund)	Class A	Class C	Class Y
Management Fees	0.45%	0.45%	0.45%
Distribution and/or Service (12b-1) Fees	0.25%	1.00%	none
Interest and Fees from Borrowing	0.05%	0.05%	0.05%
Other Expenses	0.11%	0.12%	0.11%
Total Other Expenses	0.16%	0.17%	0.16%
Total Annual Fund Operating Expenses	0.86%	1.62%	0.61%

Example. The following Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in a class of shares of the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your expenses would be as follows:

If shares are redeemed

Expense Example - (Oppenheimer Rochester® Short Term Municipal Fund) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	311	494	693	1,266
Class C	266	515	888	1,937
Class Y	63	196	341	764

If shares are not redeemed

Expense Example, No Redemption - (Oppenheimer Rochester® Short Term Municipal Fund) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	311	494	693	1,266
Class C	166	515	888	1,937
Class Y	63	196	341	764

Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 58% of the average value of its portfolio.

Principal Investment Strategies. Under normal market conditions, and as a fundamental policy, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in securities the income from which, in the opinion of counsel to the issuer of each security, is exempt from federal regular individual and, as applicable, the Fund's state income tax. The Fund selects investments with regard to the alternative minimum tax ("AMT"). The Fund will not invest more than 5% of its net assets in securities that produce income subject to the AMT.

The Fund invests in municipal securities issued by the governments of states, their political subdivisions (such as cities, towns, counties, agencies and authorities) and the District of Columbia, U.S. territories, commonwealths and possessions or by their agencies, instrumentalities and authorities. These primarily include municipal bonds (long-term (more than one year) obligations), municipal notes (short-term obligations), interests in municipal leases, and tax-exempt commercial paper. Municipal securities generally are classified as general or revenue obligations. General obligations are secured by the issuer's pledge of its full faith, credit and taxing power for the payment of principal and interest. Revenue obligations are bonds whose interest is payable only from the revenues derived from a particular facility or class of facilities, or a specific excise tax or other revenue source. The Fund can borrow money to purchase additional securities, creating "leverage" of up to one third of its total assets.

The Fund seeks to maintain a dollar-weighted average effective portfolio maturity of two years or less; however, it can buy securities that have short, intermediate or long maturities. A substantial percentage of the securities the Fund buys may be "callable," meaning that the issuer can redeem them before their maturity date. Because of events affecting the bond markets and interest rate changes, the maturity of the portfolio might not meet that target for temporary periods.

The Fund will not invest more than 5% of its total assets in securities that are rated below investment grade (sometimes referred to as "junk bonds") by a nationally recognized statistical rating organization, such as Standard & Poor's, or, if unrated, assigned a comparable rating by the Sub-Adviser, OppenheimerFunds, Inc. The Fund also will not invest more than 15% of its total assets in securities rated below the top three investment grade categories. For unrated securities, the Sub-Adviser may internally assign ratings to those securities in investment-grade or below-investment-grade categories similar to those of nationally recognized statistical rating organizations, after assessing their credit quality and other factors. There can be no assurance, nor is it intended, that the Sub-Adviser's credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. The Fund will not invest more than 5% of its total assets in securities that are unrated by a nationally recognized statistical rating organization. However, this limitation does not apply to an unrated security that the Sub-Adviser, in its discretion, determines to be comparable to another security (i) that has substantially similar characteristics, (ii) that is comparable in priority and security (if applicable), (iii) that is issued by the same issuer or guaranteed by the same guarantor, and (iv) that is rated by a nationally recognized statistical rating organization.

In selecting investments for the Fund, the portfolio managers generally look for high current income; favorable credit characteristics; a wide range of issuers including different municipalities, agencies, sectors and revenue sources; unrated bonds or securities of smaller issuers that might be overlooked by other investors; and special situations that may offer high current income or opportunities for value. The portfolio managers may consider selling a security if any of these factors no longer applies, but are not required to do so.

Principal Risks. The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or because of poor investment selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth less than what you paid for them. These risks mean that you can lose money by investing in the Fund.

Risks of Investing in Municipal Securities. Municipal securities may be subject to interest rate risk, duration risk, credit risk, credit spread risk, extension risk, reinvestment risk and prepayment risk. Interest rate risk is the risk that when prevailing interest rates fall, the values of already-issued debt securities generally rise; and when prevailing interest rates rise, the values of already-issued debt securities generally fall, and they may be worth less than the amount the Fund paid for them. When interest rates change, the values of longer-term debt securities usually change more than the values of shorter-term debt securities. Risks associated with rising interest rates are heightened given that interest rates in the U.S. are at, or near, historic lows. Duration risk is the risk that longer-duration debt securities will be more volatile and more likely to decline in price in a rising interest rate environment than shorter-duration debt securities. Credit risk is the risk that the issuer of a security might not make interest and principal payments on the security as they become due. If an issuer fails to pay interest or repay principal, the Fund's income or share value might be reduced. Adverse news about an issuer or a downgrade in an issuer's credit rating, for any reason, can also reduce the market value of the issuer's securities. "Credit spread" is the difference in yield between securities that is due to differences in their credit quality. There is a risk that credit spreads may increase when the market expects lower-grade bonds to default more frequently. Widening credit spreads may quickly reduce the market values of the Fund's lower-rated and unrated securities. Some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that the Fund might have difficulty selling them promptly at an acceptable price. Extension risk is the risk that an increase in interest rates could cause principal payments on a debt security to be repaid at a slower rate than expected. Extension risk is particularly prevalent for a callable security where an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security's call date. Such a decision by the issuer could have the effect of lengthening the debt security's expected maturity, making it more vulnerable to interest rate risk and reducing its market value. Reinvestment risk is the risk that when interest rates fall the Fund may be required to reinvest the proceeds from a security's sale or redemption at a lower interest rate. Callable bonds are generally subject to greater reinvestment risk than non-callable bonds. Prepayment risk is the risk that the issuer may redeem the security prior to the expected maturity or that borrowers may repay the loans that underlie these securities more quickly than expected, thereby causing the issuer of the security to repay the principal prior to the expected maturity. The Fund may need to reinvest the proceeds at a lower interest rate, reducing its income.

Fixed-Income Market Risks. The fixed-income securities market can be susceptible to increases in volatility and decreases in liquidity. Liquidity may decline unpredictably in response to overall economic conditions or credit tightening. During times of reduced market liquidity, the Fund may not be able to readily sell bonds at the prices at which they are carried on the Fund's books and could experience a loss. If the Fund needed to sell large blocks of bonds to meet shareholder redemption requests or to raise cash, those sales could further reduce the bonds' prices, particularly for lower-rated and unrated securities. An unexpected increase in redemptions by Fund shareholders, which may be triggered by general market turmoil or an increase in interest rates, could cause the Fund to sell its holdings at a loss or at undesirable prices.

Economic and other market developments can adversely affect fixed-income securities markets in the United States, Europe and elsewhere. At times, participants in debt securities markets may develop concerns about the ability of certain issuers of debt securities to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt securities to facilitate an orderly market. Those concerns may impact the market price or value of those debt securities and may cause increased volatility in those debt securities or debt securities markets. Under some circumstances, as was the case during the latter half of 2008 and early 2009, those concerns could cause reduced liquidity in certain debt securities markets, reducing the willingness of some lenders to extend credit, and making it more difficult for borrowers to obtain financing on attractive terms (or at all). A lack of liquidity or other adverse credit market conditions may hamper the Fund's ability to sell the debt securities in which it invests or to find and purchase suitable debt instruments.

Municipal Sector Focus Risk. The Fund will not concentrate its investments in issuers in any one industry. The Securities and Exchange Commission has taken the position that investment of more than 25% of a fund's total assets in issuers in the same industry constitutes concentration in that industry. Many types of municipal securities (such as general obligation, government appropriation, municipal leases, special assessment and special tax bonds) are not considered a part of any "industry" for purposes of this policy. Therefore, the Fund may invest more than 25% of its total assets in those types of municipal securities. Those municipal securities may finance or pay interest from the revenues of projects that are subject to similar economic, business or political developments that could increase their credit risk. Legislation that affects the financing of a particular municipal project, or economic factors that have a negative impact on a project, would be likely to affect many other similar projects. At times, the Fund may change the relative emphasis of its investments in securities issued by certain municipalities. If the Fund has a greater emphasis on investments in one or more particular municipalities, it may be subject to greater risks from adverse events affecting such municipalities than a fund that invests in different municipalities or that is more diversified.

Risks of Below-Investment-Grade Securities. Below-investment-grade debt securities (also referred to as "junk" bonds), whether rated or unrated, may be subject to greater price fluctuations than investment-grade securities, increased credit risk and a greater risk that the issuer might not be able to pay interest and principal when due, especially during times of weakening economic conditions or rising interest rates. The market for below-investment-grade securities may be less liquid and therefore these securities may be harder to value or sell at an acceptable price, especially during times of market volatility or decline.

The Fund can invest up to 5% of its assets in below-investment-grade securities. This restriction is applied at the time of purchase and the Fund may continue to hold a security whose credit rating has been downgraded or, in the case of an unrated security, after the Fund's Sub-Adviser has changed its assessment of the security's credit quality. As a result, credit rating downgrades or other market fluctuations may cause the Fund's holdings of below-investment-grade securities to exceed, at times significantly, this restriction for an extended period of time. Credit rating downgrades of a single issuer or related similar issuers whose securities the Fund holds in significant amounts could substantially and unexpectedly increase the Fund's exposure to below-investment-grade securities and the risks associated with them, especially liquidity and default risk. If the Fund has more than 5% of its total assets invested in below-investment-grade securities, the Sub-Adviser will not purchase additional below-investment-grade securities until the level of holdings in those securities no longer exceeds the restriction.

Risks of Investing in U.S. Territories, Commonwealths and Possessions. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam, and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual income taxes. Accordingly, the Fund may be adversely affected by local political, economic and social conditions and developments within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.

Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.

Risks of Shorter-Term Securities. Normally, when interest rates change, the values of shorter-term debt securities change less than the values of securities with longer maturities. The Fund tries to reduce the volatility of its share prices by seeking to maintain a shorter average effective portfolio maturity. However, shorter-term securities may have lower yields than longer-term securities. Shorter-term securities are also subject to extension and reinvestment risk. The Fund is subject to extension risk when principal payments on a debt security occur at a slower rate than expected, potentially extending the average life of the security. For securities with a call date in the near future, there is the risk that an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security's call date. Such a decision by the issuer may effectively change a short- or intermediate-term security into a longer term security, which could have the effect of locking in a below-market interest rate on the security, increasing the security's duration, making the security more vulnerable to interest rate risk, reducing the security's market value and increasing the Fund's average effective portfolio maturity. Under such circumstances, because the values of longer term securities generally fluctuate more widely in response to interest rate changes than shorter term securities, the Fund's volatility could increase. Reinvestment risk is the risk that if interest rates fall the Fund may need to invest the proceeds of redeemed securities in securities with lower interest rates.

Risks of Borrowing and Leverage. The Fund can borrow up to one-third of the value of its assets (including the amount borrowed), as permitted under the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including purchasing securities, which creates "leverage." In that case, changes in the value of the Fund's investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund's return if the yield on the securities purchased is less than those borrowing costs. The Fund may also borrow to meet redemption obligations or for temporary and emergency purposes. The Fund participates in a line of credit with other Oppenheimer funds for its borrowing.

The Fund can participate in a committed reverse repurchase agreement program. Reverse repurchase agreements that the Fund may engage in also create leverage. A reverse repurchase agreement is the sale by the Fund of a debt obligation to a party for a specified price, with the simultaneous agreement by the Fund to repurchase that debt obligation from that party on a future date at a higher price. Similar to a borrowing, reverse repurchase agreements provide the Fund with cash for investment and operational purposes. When the Fund engages in reverse repurchase agreements, changes in the value of the Fund's investments will have a larger effect on its share price than if it did not engage in these transactions due to the effect of leverage. Reverse repurchase agreements create fund expenses and require that the Fund have sufficient cash available to repurchase the debt obligation when required. Reverse repurchase agreements also involve the risk that the market value of the debt obligation that is the subject of the reverse repurchase agreement could decline significantly below the price at which the Fund is obligated to repurchase the security.

Taxability Risk. The Fund's investments in municipal securities rely on the opinion of the issuer's bond counsel that the interest paid on those securities will not be subject to federal income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, after the Fund buys a security, the Internal Revenue Service may determine that a bond issued as tax-exempt should in fact be taxable and the Fund's dividends with respect to that bond might be subject to federal income tax.

Who Is the Fund Designed For? The Fund is designed for investors seeking tax-free income. Because it invests in tax-exempt securities, the Fund is not appropriate for a retirement plan or other tax-exempt or tax-deferred account. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

The Fund's Past Performance. The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance (for Class A shares) from calendar year to calendar year and by showing how the Fund's average annual returns for the periods of time shown in the table compare with those of a broad measure of market performance. The Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More recent performance information is available by calling the toll-free number on the back of this prospectus and on the Fund's website: https://www.oppenheimerfunds.com/fund/RochesterShortTermMunicipalFund

Sales charges and taxes are not included and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 1.56% (2nd Qtr 2011) and the lowest return for a calendar quarter was -0.36% (2nd Qtr 2013). For the period from January 1, 2015 to June 30, 2015 the cumulative return before sales charges and taxes was 0.19%.

The following table shows the average annual total returns for each class of the Fund's shares. After-tax returns are calculated using the highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes. Your actual after-tax returns, depending on your individual tax situation, may differ from those shown and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for only one class and after-tax returns for other classes will vary.

Average Annual Total Returns for the periods ended December 31, 2014

Average Annual Total Returns - (Oppenheimer Rochester® Short Term Municipal Fund)	Inception Date	1 Year	5 Years (or life of class, if less)
Class A	Dec. 06, 2010	1.26%	2.20%
Class A | Return After Taxes on Distributions		1.26%	2.20%
Class A | Return After Taxes on Distributions and Sale of Fund Shares		1.55%	2.12%
Class C	Dec. 06, 2010	1.81%	1.99%
Class Y	Dec. 06, 2010	3.85%	3.01%
Barclays 1-Year Municipal Bond Index (reflects no deduction for fees, expenses or taxes)		0.59%	0.93%	[1]
Consumer Price Index (reflects no deduction for fees, expenses or taxes)		0.76%	1.74%	[1]

[1] As of 11/30/10.

[1] Expenses have been restated to reflect current fees.