NEW YORK (TheStreet) -- RATINGS CHANGES

AIG (AIG) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: AIG Ratings Report.

Citrix Systems (CTXS) was downgraded at Goldman Sachs to neutral from buy. Twelve-month price target is $69. Company lacks near-term catalysts, Goldman said.

Chevron (CVX) was downgraded at Goldman Sachs to sell. Twelve-month price target is $99. Company is burning through free cash flow, which should limit dividend growth in the coming quarters, Goldman Sachs said.

DeVry Education Group (DV) was downgraded at Deutsche Bank to hold from buy. Twelve-month price target is $34. With trends across the U.S., for-profit industry getting worse, and it's hard to see how the market will change its negative view on DeVry Undergrad, Deutsche Bank said.

GoPro (GPRO) was upgraded at Oppenheimer to perform from underperform. Company lacks near-term negative catalysts, Oppenheimer said.

Liberty Media (LMCA) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: LMCA Ratings Report.

Las Vegas Sands (LVS) was downgraded at Goldman Sachs to neutral from buy. Twelve-month price target is $52. Company has over-exposure to Macau, Goldman Sachs said.

Owens-Illinois (OI) was upgraded at Bank of America/Merrill Lynch to neutral from underperform. Twelve-month price target is $28. Vitro deal should boost growth, Bank of America/Merrill Lynch said.

Seventy Seven Energy (SSE) was upgraded to buy from hold at Jefferies. Twelve-month price target is $10. Jefferies' meetings with SSE CFO Cary Baetz and investors reinforced their comfort that SSE is nearing a low point in activity, even with a softer Chesapeake Energy (CHK) demand outlook. This view, along with better than previously understood cash-flow generation and continued favorable bias regarding long-term value given SSE's rig fleet capability, prompts upgrade.

Toll Brothers (TOL) was upgraded at Sterne Agee CRT to neutral from underperform. Twelve-month price target is $34. News flow should be more positive in the coming quarters, Sterne Agee CRT said.

Editor's note: To see analysts' stock comments and changes to price targets and earnings estimates, go to "Street Notes," which is available only to Real Money subscribers. To find out how to become a subscriber, please click here.

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This article was written by a staff member of TheStreet.

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