NEW YORK (TheStreet) -- RATINGS CHANGESCovanta Holding ( CVA) was downgraded at Barclays to equal-weight from overweight. Valuation has been fully realized after 37% year-to-date gain, Barclays said.
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Mellanox (MLNX) was upgraded at Barclays to overweight from equal-weight. Tailwinds over the next 18 to 24 months include strength in the HPC industry, an upcoming server refresh cycle, data center and storage spending trends, strength in the 40G market and the eventual move to 100G, Barclays said. Twelve-month price target was raised to $57 from $50.
Prosperity Bancshares (PB) was upgraded at FIG to outperform from market perform. Twelve-month price target is $65. Stock has pulled back to an attractive level, FIG said.
Priceline.com (PCLN) was downgraded at FBR Capital Markets to market perform from outperform. Twelve-month price target is $1,225. Guidance suggests that growth is decelerating, FBR Capital Markets said.
PerkinElmer (PKI) was downgraded at Goldman Sachs to neutral from buy. Company was also cut from the Conviction list. Valuation call, based on a 12-month price target of $47, Goldman Sachs said.