Today's noteworthy upgrades include: Ambarella (AMBA) upgraded to Hold following Q1 report at Needham... Frontier Communications (FTR) upgraded to Buy from Neutral at DA Davidson... HSN, Inc. (HSNI) upgraded to Buy from Hold at Stifel... Hudbay Minerals (HBM) upgraded to Buy from Neutral at BofA/Merrill... Humana (HUM) upgraded to Neutral from Underperform at Sterne Agee CRT... Interxion (INXN) upgraded to Outperform from Market Perform at William Blair... Ivanhoe Mines (IVPAF) upgraded to Neutral from Underperform at BofA/Merrill... NICE Systems (NICE) upgraded to Overweight from Neutral at JPMorgan... Nuance (NUAN) upgraded to Outperform at Raymond James... PGT, Inc. (PGTI) upgraded to Buy from Neutral at SunTrust... Petrobras (PBR) upgraded to Buy from Accumulate at Tudor Pickering... Progressive Waste (BIN) upgraded on improved execution at KeyBanc... Take-Two (TTWO) upgraded to Outperform from Market Perform at Cowen... Wi-LAN (WILN) upgraded to Sector Performer from Underperformer at CIBC... ZELTIQ (ZLTQ) upgraded to Buy from Neutral at Goldman.

Raymond James raised the firm's price target on Hudbay Minerals to C$11.50 from C$10.50 and keeps an Outperform rating on the shares.

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Get caught up quickly on the top news and calls moving stocks with these five Top Five lists. 1... To see the rest of the story go to thefly.com. See Story Here