NEW YORK (TheStreet) -- RATINGS CHANGES

Applied Genetic Technologies (AGTC) - Get Report was initiated at Cantor Fitzgerald with a buy rating. Rating is based on solid foundation and rapid clinical trial timelines, Cantor Fitzgerald said. Twelve-month price target is $21.

AthenaHealth (ATHN) - Get Report was upgraded at Jefferies to hold from underperform, Jefferies said. New catalysts include strong small group bookings and new Enterprise Coordinator partners, Jefferies said. Twelve-month price target is $145.

Chipotle (CMG) - Get Report was upgraded at J.P. Morgan to overweight from equal-weight. Driven by first-quarter earnings and recent stock weakness, J.P. Morgan said.

Cornerstone OnDemand (CSOD) - Get Report was upgraded at UBS to buy from neutral. Valuation call with strong fundamentals against stock volatility, UBS said. Twelve-month price target is $60.

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Dynegy (DYN) was upgraded at UBS to buy from neutral. Driven by latest commodity rally, UBS said. Twelve-month price target is $31.

Frontier Communications (FTR) - Get Report was upgraded to buy at TheStreet Ratings.

GasLog Limited (GLOG) - Get Report was downgraded at Jefferies to hold from buy. Near-term LNG shipping outlooks remains weak, Jefferies said. Twelve-month price target is $28.

PDC Energy (PDCE) - Get Report was downgraded at BMO Capital to market perform from outperform. Valuation call. Twelve-month price target is $63.

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Teco Energy (TE) was upgraded to buy at TheStreet Ratings.

Safe Bulkers (SB) - Get Report was upgraded at Jefferies to buy from hold. Well-positioned to capitalize on additional attractive new-build/resale opportunities, Jefferies said. Twelve-month price target is $11.

Yum Brands (YUM) - Get Report was downgraded at J.P. Morgan to neutral from overweight. Valuation call with new reporting structure, J.P. Morgan said.

Zimmer (ZMH) was upgraded at Cantor Fitzgerald to buy from hold. Valuation call with improving volume and mix trends, Cantor Fitzgerald said. Twelve-month price target is $105.

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