NEW YORK (

TheStreet Ratings

) -- TheStreet.com Ratings initiated coverage of 13 exchange-traded funds, or ETFs, that accrued a sufficient track record of risk and performance data by the end of June 2011. Four of the 13 newly rated exchange-traded funds start out in the 'Buy' range.

Two of the funds that opened for business in June of 2010 received our highest possible rating of A+, or Excellent. None performed better over their first year of trading than the

Teucrium Corn Fund

(CORN) - Get Report

jumping in value by 56.1%.

The Fund seeks to have the daily changes in percentage terms of the shares' net asset value reflect the daily changes in percentage terms of a weighted average of the closing settlement prices for three futures contracts for corn ("Corn Futures Contracts") that are traded on the Chicago Board of Trade. Companies impacted by the rise in corn prices include

General Mills

(GIS) - Get Report

,

Krispy Kreme Doughnuts

(KKD)

,

Kraft Foods

(KFT)

, and

Tyson Foods

(TSN) - Get Report

Inc.

Another newly rated ETF starting at A+, the

United States Brent Oil Fund

(BNO) - Get Report

, returned 52.7% in one year. The Fund seeks the daily changes in percentage terms of net asset value to reflect the daily changes in percentage terms of the spot price of Brent crude oil as measured by the changes in the price of the futures contract. Brent crude oil is a light crude oil that is ideal for production of gasoline. Winners for high oil prices include annual bailout recipients

Exxon Mobil

(XOM) - Get Report

,

ConocoPhillips

(COP) - Get Report

, and

Chevron

(CVX) - Get Report

.

Global X Brazil Mid Cap ETF

(BRAZ)

, also rated in the 'buy' range at A-. The fund seeks to provide investment results that correspond generally to the price and yield performance of the Solactive Brazil Mid Cap Index. The index is a liquidity tested and market capitalization-weighted benchmark that is designed to measure the performance of mid-market capitalization companies that are domiciled or have their main business operations in Brazil.

PowerShares International Corp Bond

(PICB) - Get Report

starts out in the 'buy' with an initial grade of A- as well. The fund seeks investment results that correspond generally to the price and yield performance of the index called the S&P International Corporate Bond Index. The underlying index measures the performance of investment grade corporate bonds issued by non-U.S. issuers in various currencies.

Research Methodology

TheStreet.com Ratings condenses the available fund performance and risk data into a single composite opinion of each fund's risk-adjusted performance. This allows the unbiased identification of those funds that have historically done well and those that have underperformed the market. While there is no guarantee of future performance, these investment ratings provide a solid framework for making informed, timely investment decisions. The funds listed below have reached their one year anniversary.

Funds rated A or B are considered "Buy" rated based on a track record of higher than average risk-adjusted performance. Funds at the C level are rated as "Hold," while underperformers at the D and E levels our model ranks as "Sell."

-- Reported by Kevin Baker in Jupiter, Fla.

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Kevin Baker became the senior financial analyst for TheStreet Ratings upon the August 2006 acquisition of Weiss Ratings by TheStreet.com, covering equity and mutual fund ratings. He joined the Weiss Group in 1997 as a banking and brokerage analyst. In 1999, he created the Weiss Group's first ratings to gauge the level of risk in U.S. equities. Baker received a B.S. degree in management from Rensselaer Polytechnic Institute and an M.B.A. with a finance specialization from Nova Southeastern University.