Analysts' Actions: AKAM, CIEN, ZNGA, FFIV

NEW YORK ( TheStreet) -- CHANGE IN RATINGS

Akamai ( AKAM) was upgraded at Canaccord Genuity to buy. $45 price target. Newer video applications should drive near-term growth, Canaccord said.

Allegheny Technologies ( ATI) was downgraded at JP Morgan from overweight to neutral. $29 price target. Estimates also cut, given the oversupply in the stainless steel market, JP Morgan said.

Cubist Pharmaceuticals ( CBST) was initiated with a sell rating at Cantor Fitzgerald. $37 price target. Cubicin growth will likely slow in 2013, Cantor said.

Cullen/Frost ( CFR) was upgraded at Sterne Agee from underperform to neutral. Valuation call, based on a $54 price target, Sterne Agee said.

Ciena ( CIEN) was upgraded at FBR Capital Markets from market perform to outperform. Company can gain market share in the coming quarters, FBR Capital Markets said.

Crocs ( CROX) was downgraded at Sterne Agee from buy to neutral. Estimates were also cut, given the company's new guidance, Sterne Agee said.

F5 Networks ( FFIV) was downgraded at Wunderlich from buy to hold. $100 price target. Company posted lower earnings and is leveraged to slower macro growth, Wunderlich said.

LSI ( LSI) was downgraded at Wedbush from outperform to neutral. $7 price target. Company is seeing lower flash demand, Wedbush said.

NY Community Bancorp ( NYB) was downgraded at Keefe, Bruyette & Woods from outperform to market perform. $13.50 price target. Net interest margin is declining and the company lacks near-term visibility, KBW said.

Prosperity Bancshares ( PB) was upgraded at KBW from market perform to outperform. $48 price target. American State deal will add to earnings, KBW said.

Wyndham ( WYN) was downgraded at Deutsche Bank from buy to hold. Valuation call, based on a $57 price target, Deutsche Bank said.

Zynga ( ZNGA) was upgraded at Needham from hold to buy. Valuation call, based on a $4 price target, Needham said. Company has a solid cash cushion, Needham added.

STOCK COMMENTS / EPS CHANGES

Best Buy ( BBY) numbers were cut at UBS. Shares are now seen reaching $18. Estimates were also lowered following preannouncement, UBS said. Neutral rating.

Cheesecake Factory ( CAKE) numbers were reduced at Lazard. Shares are now seen reaching $39. Estimates were also cut, given lower expected store growth, Lazard said. Buy rating.

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