NEW YORK (TheStreet) -- RATINGS CHANGES

Ambarella (AMBA) - Get Report was downgraded at Needham to underperform from hold. Valuation call, as the stock is up 65% year to date, Needham said.

Gilead (GILD) - Get Report was upgraded at Morgan Stanley to overweight from equal-weight. Twelve-month price target is $104. Fear over Abbvie (ABBV) - Get Report pricing has created a buying opportunity, Morgan Stanley said.

Halyard Health (HYH) was initiated with an outperform rating at JMP Securities. Twelve-month price target is $50. Company should benefit from lower raw materials costs and can make a small acquisition to augment growth, JMP Securities said.

Hovnanian (HOV) - Get Report was upgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: HOV Ratings Report.

Liberty Property Trust (LPT) - Get Report was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: LPT Ratings Report.

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This article was written by a staff member of TheStreet.