RATINGS CHANGES

Bruker (BRKR) - Get Report was downgraded to market perform from outperform at Leerink. $27 price target. The company may struggle to continue expanding margins in the coming quarters, Leerink said. 

Bruker was also downgraded by Bank of America/Merrill Lynch, to underperform from neutral. $26 price target. The valuation isn't as attractive, as the stock is already trading north of 25 times expected 2017 earnings, analysts said. 

Chemtura (CHMT) was upgraded to overweight at Keybanc. $32 price target. The stock has lagged, but favorable industry dynamics could drive earnings upside in the coming quarters, Keybanc said.

Capital One (COF) - Get Report was downgraded to underperform from perform at Oppenheimer. $58 price target. Earnings estimates were also cut, given market headwinds, Oppenheimer said. 

Cisco Systems (CSCO) - Get Report was downgraded to neutral from buy at Bank of America/Merrill Lynch. $30 price target. The company lacks near-term catalysts, analysts said.

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

Fifth Third Bank (FITB) - Get Report was downgraded to market perform from outperform at BMO Capital. $19 price target. The company is facing near-term earnings headwinds, BMO said. 

LPL Financial (LPLA) - Get Report was downgraded to sell from neutral at Goldman Sachs. The valuation isn't as attractive, as the stock is up 50% from its lows and trades at a steep premium to its peers, Goldman said. 

PerkinElmer (PKI) - Get Report was downgraded to neutral from buy at Bank of America/Merrill Lynch. $52 price target. The company is facing near-term margin headwinds, analysts said. 

PulteGroup (PHM) - Get Report was downgraded to neutral from overweight at JPMorgan. $18 price target. The CEO resignation adds uncertainty to the thesis, JPMorgan said. 

Waters (WAT) - Get Report was downgraded to neutral from buy at Bank of America/Merrill Lynch. $137 price target. The company trades at a premium to its peers, but faces difficult near-term comps, analysts said. 

Western Gas Partners(WES) - Get Report was upgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: WES.

Xylem (XYL) - Get Report was upgraded to buy from neutral at Sterne Agee. $52 price target. Organic revenue growth is set to accelerate, Sterne said. 

This article was written by a staff member of TheStreet.