Stocks were mixed on Tuesday after hitting new highs last week. The S&P 500 is above 2,100 and the Dow Jones Industrial Average is above 18,000, and the Nasdaq wants to challenge the 5,000 mark again for the first time in 15 years. One trend that has been set in stone over the past two years or more is that investors buy stocks after every single pullback. They see each retreat as a chance to buy stocks they wanted to own or that are overlooked or offer value.

24/7 Wall St. reviews dozens of analyst reports each morning of the week. The aim is to find new investment and trading ideas for our readers. Some of these analyst research reports cover stocks to buy, while others cover stocks to sell or avoid.

These are this Tuesday’s top analyst upgrades, downgrades and initiations.

American Airlines Group Inc. (NASDAQ: AAL) was downgraded to Market Perform from Outperform at Cowen.

Computer Science Corp. (NYSE: CSC) was downgraded to Hold from Buy at Stifel.

Chevron Corp. (NYSE: CVX) downgraded to Perform from Outperform at Oppenheimer.

Coach Inc. (NYSE: COH) was raised to Outperform from Perform and the price target was raised to $50 from $36 (versus a $41.71 close) at Oppenheimer.

Duke Energy Corp. (NYSE: DUK) was reiterated as Buy with a $99 target after last week’s earnings, and shares closed at $79.26 on Monday.

Newmont Mining Co. (NYSE: NEM) was downgraded to Neutral from Overweight at HSBC.

ALSO READ: The 5 Stocks Taking the Nasdaq to 5,000

Sprint Corp. (NYSE: S) was downgraded to Sell from Neutral with $3.25 price target (versus a $4.67 close) at a firm called BTIG Research.

Vodafone Group PLC (NYSE: VOD) was downgraded to Underperform from Neutral at Bank of America Merrill Lynch.

Other key analyst upgrades, downgrades and initiations were as follows: