NEW YORK (TheStreet) -- RATINGS CHANGES
Ambarella (AMBA) was downgraded at Needham to underperform from hold. Valuation call, as the stock is up 65% year to date, Needham 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.
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