24/7 Wall St.

Stocks were lower in the wee-hours of Monday’s premarket trading session and then were more mixed and looking for direction as the morning got underway. Investors have shown over and over that they want to buy any pullbacks or any time a new opportunity arises. 24/7 Wall St. reviews dozens of analyst research reports each morning. Some analyst reports cover stocks to buy and others cover stocks to sell or avoid. These are this Monday’s top analyst upgrades, downgrades and initiations.

Activision Blizzard Inc. (NASDAQ: ATVI) was downgraded to Neutral from Buy at Bank of America Merrill Lynch.

Aclaris Therapeutics Inc. (NASDAQ: ACRS) was started as Buy at Citigroup and also at Jefferies.

American Tower Corp. (NYSE: AMT) was maintained as Buy with a $110 price target at Canaccord Genuity.

Calpine Corp. (NYSE: CPN) was downgraded to Hold from Buy at Deutsche Bank.

Chevron Corp. (NYSE: CVX) was maintained as Neutral but the price target was lowered to $87 from $100 at Credit Suisse.

CytomX Therapeutics Inc. (NASDAQ: CTMX) was started as Outperform with $17 price target at Oppenheimer. Jefferies started it as Buy with a $19 price target.

CVS Health Corp. (NYSE: CVS) was maintained as Outperform but its price target was lowered to $115 from $122 at Oppenheimer.

DexCom Inc. (NASDAQ: DXCM) was started as Overweight at Morgan Stanley.

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Dick’s Sporting Goods Inc. (NYSE: DKS) was downgraded to Neutral from Buy at Monness Crespi Hardt.

Digital Realty Trust Inc. (NYSE: DLR) was downgraded to Market Perform from Outperform at Raymond James.

Heartland Payment Systems Inc. (NYSE: HPY) was downgraded to Market Perform from Outperform at Raymond James.

Intercontinental Exchange Inc. (NYSE: ICE) was downgraded to Hold from Buy at Argus.

KeyCorp. (NYSE: KEY) was raised to Buy from Neutral at Citigroup.

Mercer International Inc. (NASDAQ: MERC) was raised to Outperform from Neutral with a $15 price target at Credit Suisse.

MGM Resorts International (NYSE: MGM) was raised to Buy from Neutral with a $27 price target at UBS.

Norfolk Southern Corp. (NYSE: NSC) was downgraded to Underperform from Neutral at Macquarie.

Phillips 66 (NYSE: PSX) was downgraded to Neutral from Outperform with a $105 price target at Credit Suisse.

Pure Storage Inc. (NYSE: PSTG) was started as Buy with a $24 price target at Stifel. Barclays started it as Equal Weight, and Raymond James started it as Outperform with a $23 price target.

Restaurant Brands International Inc. (NYSE: QSR) was downgraded to Sector Perform from Outperform at RBC Capital Markets.

Royal Bank of Scotland Group PLC (NYSE: RBS) was raised to Outperform from Neutral at BNP Paribas.

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In case you missed Friday’s top analyst upgrades and downgrades, they included DreamWorks Animation, First Solar, NVIDIA, SolarCity, Valeant Pharmaceutical, YRC Worldwide and over a dozen more companies.