
AK Steel Corp. (NYSE: AKS) was downgraded to Neutral from Outperform at Macquarie.
American Homes 4 Rent (NYSE: AMH) was raised to Overweight at Morgan Stanley.
ArcelorMittal (NYSE: MT) was downgraded to Hold from Buy at Jefferies.
Biogen Idec Inc. (NASDAQ: BIIB) was downgraded to Hold from Buy at Stifel.
Callaway Golf Co. (NYSE: ELY) was raised to Outperform from In-Line and the price target was raised to $12 from $8 (versus a $8.58 close) at Imperial Capital.
Carnival Corp. (NYSE: CCL) was downgraded to Hold from Buy with a $51 price target (versus a $46.88 close) at Deutsche Bank.
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Dynavax Technologies Corp. (NASDAQ: DVAX) was raised to Overweight from Neutral at J.P. Morgan.
EMC Corp. (NYSE: EMC) was downgraded to Neutral from Overweight and the target price was cut to $27 from $30 (versus a $26.70 close) at Piper Jaffray
Enterprise Products Partners L.P. (NYSE: EPD) was raised to Buy from Hold at Jefferies.
Kinder Morgan Inc. (NYSE: KMI) was started as Buy with a $50 price target at Argus.
Navios Maritime Partners L.P. (NYSE: NMM) was raised to Buy from Hold at Deutsche Bank.
NetApp Inc. (NASDAQ: NTAP) was downgraded to Neutral and the target price was cut to $36 from $42 (versus a $37.32 close) from Overweight at Piper Jaffray.
NVIDIA Corp. (NASDAQ: NVDA) was downgraded to Sell from Neutral with a $20 price target (versus a $23.47 close) at Goldman Sachs.
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Staples Inc. (NASDAQ: SPLS) was raised to Buy from Neutral at UBS.
Targa Resources Partners L.P. (NYSE: NGLS) was raised to Buy from Hold at Jefferies.
Tyco International Ltd. (NYSE: TYC) was raised to Overweight from Equal Weight with a $48 price target (versus a $43.14 close) at Barclays.
Xylem Inc. (NYSE: XYL) was downgraded to Equal Weight from Overweight at Barclays.
In case you missed Friday’s top analyst upgrades and downgrades, they were in shares of Boston Scientific, Carnival, Ericsson, Honeywell, Pier 1 Imports, Tesoro, Trimble Navigation and many more. Also, here are five oil and gas stocks analysts want you to buy.