RATINGS CHANGES

Alkermes (ALKS) - Get Report was upgraded to overweight from neutral at JPMorgan. $78 price target. The company announced positive clinical data for major depressive order treatment earlier than expected, JPMorgan said. 

BancorpSouth (BXS) - Get Report was downgraded to sector perform at RBC Capital. $25 price target. The company has limited near-term earnings upside potential, RBC said. 

Chesapeake Energy (CHK) - Get Report was upgraded to neutral from underperform at Bank of America/Merrill Lynch. $10 price target. The company should see a business and profit inflection in the second quarter of 2017, analysts said. 

Chesapeake was upgraded to neutral from reduce at Nomura Securities. $7.50 price. The company will likely cut debt by more than $2 billion and boost oil production in the coming quarters, Nomura said. 

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

Microsoft (MSFT) - Get Report was upgraded to outperform from market perform at William Blair. Cloud positioning can drive long-term growth, William Blair said. 

Signature Bank (SBNY) - Get Report was downgraded to market perform from outperform at BMO Capital. $128 price target. The company has limited earnings upside potential, BMO said. 

Tupperware Brands (TUP) - Get Report was downgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: TUP.

Ubiquiti (UBNT) was upgraded to market perform from underperform at JMP Securities. Momentum appears to be growing across a number of product lines, JMP said. 

Union Pacific (UNP) - Get Report was downgraded to sector perform at RBC Capital. $98 price target. Fundamental trends are deteriorating, which will keep a lid on potential multiple expansion, RBC said. 

Yahoo! (YHOO) was downgraded to hold from buy at Jefferies. $48 price target. The valuation is less attractive, based on a sum-of-the-parts valuation, Jefferies said. 

This article was written by a staff member of TheStreet.