NEW YORK (TheStreet) -- RATINGS CHANGES

Alcoa(AA) - Get Report was upgraded at Bank of America/Merrill Lynch to neutral from underperform. Valuation call, based on a 12-month price target of $14, Bank of America/Merrill Lynch said.

Alliance Data(ADS) - Get Report was upgraded at Nomura to buy. Twelve-month price target is $300. PL portfolio can continue to drive growth, Nomura said.

Big Lots(BIG) - Get Report was upgraded at Benchmark to buy. Twelve-month price target is $49. Operations appear to have turned around, Benchmark said.

Brookdale Senior Living(BKD) - Get Report was initiated at Jefferies with a buy rating. Pending acquisition of Emeritus (ESC) should drive synergies and incremental equity value, Jefferies said. Twelve-month price target is $40.

[Read: 3 Stocks Breaking Out on Big Volume]

Century Aluminum(CENX) - Get Report was upgraded at Bank of America/Merrill Lynch to neutral. Twelve-month price target is $14. Company is leveraged to higher aluminum prices, Bank of America/Merrill Lynch said.

Global Eagle Entertainment(ENT) - Get Report was downgraded to sell at TheStreet Ratings.

Gaslog Partners(GLOP) - Get Report was initiated at UBS with a buy rating. Significant built-in growth opportunities, UBS said. Twelve-month price target is $31.

Dorian(LPG) - Get Report was initiated at UBS with a buy rating. LPG market dynamics remain positive, UBS said. Twelve-month price target is $23.

Microchip(MCHP) - Get Report was downgraded at Goldman Sachs to neutral from buy. Valuation call, based on a 12-month price target of $49, Goldman said.

Magnum Hunter (MHR) was upgraded at Stifel Nicolaus to buy from hold. Twelve-month price target is $11. Private placement removes any financing overhang, Stifel Nicolaus said.

[Read: The Money Manager Feud of the Year]

Microsemi (MSCC) was upgraded at Goldman Sachs to buy from neutral. Twelve-month price target is $30. Company has attractive, late-cycle exposure, Goldman said.

Northwestern(NWE) - Get Report was upgraded at Keybanc to buy. Twelve-month price target is $48. Expect Montana acquisition to be approved, which will be accretive to the rate base, Keybanc said.

Oil States(OIS) - Get Report was upgraded at Sterne Agee to buy from neutral. Twelve-month price target is $72. Completion and offshore businesses can deliver strong earnings growth over the next several years, Sterne Agee said.

[Read: Should College Rankings Exist for Sexual Assault?]

PacWest(PACW) - Get Report was upgraded at DA Davidson to buy. Twelve-month price target is $47. Company will likely make more acquisitions to augment growth, DA Davidson said.

Proofpoint(PFPT) - Get Report was upgraded at Sterne Agee to buy. Twelve-month price target is $40. New products should continue to drive sales growth, Sterne Agee said.

Safe Bulkers(SB) - Get Report was downgraded to hold at TheStreet Ratings.

Theravance (THRX) was downgraded at Robert Baird to neutral from outperform. Twelve-month price target is $21. Breo sales have been disappointing, Baird said.

TripAdvisor(TRIP) - Get Report was upgraded at Pacific Crest to outperform. Twelve-month price target is $116. Growth is accelerating, Pacific Crest said.

Xilinx(XLNX) - Get Report was downgraded at Goldman Sachs to neutral from buy. Twelve-month price target is $49. Company lacks visibility, heading into the second half of the year, Goldman said.

Zillow(Z) - Get Report was downgraded at RBC Capital to sector perform from outperform. Valuation call, based on a 12-month price target of $115, RBC Capital said.

Zillow was downgraded at Pacific Crest to sector perform. Valuation call, Pacific Crest 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.

Follow TheStreet on Twitter and become a fan on Facebook.

>>Read More: Bubble? Correction? Shut Up, Chicken Little, It's a Consolidation

>>Read More: 10 Stocks Legendary Investor Ben Graham Would Buy Now

This article was written by a staff member of TheStreet.