NEW YORK ( TheStreet) -- RATINGS CHANGES

Booz Allen Hamilton (BAH) - Get Report was downgraded at Morgan Stanley to Underweight. $23 price target. Company is facing increased competition. 

BankUnited (BKU) - Get Report was upgraded at BofA/Merrill from Neutral to Buy, Bank of America/Merrill Lynch said. $42 price target. Company has no oil exposure and limited downside from lower interest rates. 

Casey's General (CASY) - Get Report was upgraded at BMO to Market Perform, BMO Capital said. Company is cutting costs and is leveraged to lower gasoline prices. $105 price target. 

Chevron (CVX) - Get Report was upgraded at JP Morgan from Neutral to Overweight, JP Morgan said. Valuation call, based on a $86 price target. 

Concho (CXO) - Get Report was downgraded at Goldman from Buy to Neutral, Goldman Sachs said. $123 price target. Valuation call, as the stock has outperformed its peers by more than 30% year-to-date. 

Finisar (FNSR) - Get Report was downgraded at MKM from Buy to Neutral, MKM Partners said. Datacom environment continues to deteriorate. $15.50 price target. 

Helmerich & Payne (HP) - Get Report was downgraded at Jefferies from Hold to Underperform. Company is leveraged to lower rig day rates. $40 price target. 

JB Hunt (JBHT) - Get Report was upgraded at BofA/Merrill from Neutral to Buy. $90 price target. Company is gaining market share. 

Lululemon (LULU) - Get Report was upgraded at Baird from Neutral to Outperform,. $69 price target. Stock fell after earnings, but the company has strong sales momentum.

Motorola Solutions (MSI) - Get Report was downgraded to Underperform at Wells Fargo. Stock is overvalued, following the recent tender offer. 

Noble Energy (NBL) - Get Report was upgraded at Jefferies from Hold to Buy. Valuation call, based on a $37 price target. 
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Norfolk Southern (NSC) - Get Report was upgraded at BofA/Merrill from Neutral to Buy. $90 price target. Rail carloads are bottoming out.

Roper (ROP) - Get Report was downgraded at JP Morgan from Neutral to Underweight. Valuation call, based on a $158 price target.

Toll Brothers (TOL) - Get Report was upgraded at JP Morgan from Underweight to Neutral. Valuation call, based on a $41.50 price target.

Whiting Petroleum (WLL) - Get Report was upgraded at Goldman from Neutral to Buy. $24 price target. Company is improving its balance sheet by selling assets.

Zendesk (ZEN) - Get Report was upgraded at Credit Suisse from Neutral to Outperform. $30 price target. Company can generate sustainable, robust revenue growth.

Zoetis (ZTS) - Get Report was upgraded at BMO from Market Perform to Outperform. $53 price target. Stock is down 20% since June, but the company has positive long-term prospects.

This article was written by a staff member of TheStreet.