Top Analyst Action: AXTI, CORI, TD, IVAC, ALLT

AXT AXTI Craig Hallum raises rating to buy from hold

Corium International CORI WBB Securities raises to speculative buy from hold with $11.00 price target

Toronto-Dominion Bank TD Credit Suisse raises to outperform from neutral

Intevac IVAC Maxim Group raises to buy from hold, price target to $11.00 from $6.70

Allot Comms ALLT Wunderlich lowers rating to hold from buy, price target to $5.50 from $7.00

K2M Group KTWO Northland Capital lowers to market perform from outperform

Opower (NYSE MKT: OPWR) Avondale lowers to market perform from outperform

Enersis Americas SA ENIA Citigroup lowers to neutral from buy

Sterling Construction STRL BWS Financial lowers to hold from buy with $6.00 price target

Winnebago Inds WGO Sidoti initiates coverage at neutral

Heron Therapeutics HRTX Cantor Fitzgerald starts at buy

Intrexon XON JMP Securities starts at outperform

Kroger KR Sun Trust Rbsn Humphrey starts at neutral with $39.00 price target

Flexion Therapeutics FLXN Wells Fargo resumes coverage at outperform

Activision Blizzard ATVI MKM Partners raises price target to $38.00 from $34.00 with buy rating

Marvell MRVL MKM Partners raises price target to $10.00 from $9.00 with neutral rating

Fabrinet FN Needham raises price target to $40.00 from $35.00 with buy rating

Del Taco TACO Wedbush lowers price target to $15.00 from $16.00 with outperform rating