Stocks were mixed on Monday, following four consecutive days of gains, and Tuesday was indicated to have a strong open. The markets are effectively at all-time highs, and the raging bull market is now two months shy of nine years old. Investors have made money buying every sell-off for the past five years, and they are deciding how to position their portfolios for 2018 and beyond. Those same investors are also looking for new ideas.

24/7 Wall St. reviews dozens of analyst research reports each day of the week to find new investing and trading ideas for investors and traders alike. Some of the daily analyst reports and research reports cover stocks to buy. Others cover stocks to sell or to avoid.

Additional color and commentary has been added on most of these daily analyst calls. Consensus analyst price targets mentioned and other valuation metrics are from the Thomson Reuters sell-side research service.

These were the top analyst upgrades, downgrades and other research calls from Tuesday, January 9, 2018.

AK Steel Holding Corp. (NYSE: AKS) was downgraded to Hold from Buy with a $6.50 price target (versus a $6.64 prior close) at Jefferies. AK Steel has a 52-week trading range of $4.00 to $11.28 and a consensus analyst price target of $6.40.

Carnival Corp. (NYSE: CCL) was raised to Outperform from Neutral with a $78 price target (versus a $66.05 close) at Credit Suisse. Carnival has a 52-week range of $52.65 to $69.89 and a consensus price target of $74.98.

FedEx Corp. (NYSE: FDX) was raised to Buy from Neutral at UBS. FedEx has a 52-week range of $182.89 to $271.39 and a consensus price target of $272.92.

PayPal Holdings Inc. (NASDAQ: PYPL) was raised to Outperform from Market Perform with an $88 price target (versus a $79.05 close) at Cowen. PayPal has a 52-week range of $39.02 to $79.39 and a consensus price target of $81.83.

Sunoco L.P. (NYSE: SUN) was raised to Overweight from Neutral with a $34 price target (versus a $29.20 close) at JPMorgan. Sunoco has a 52-week range of $23.09 to $32.67 and a consensus price target of $31.69.

Teva Pharmaceutical Industries Ltd. (NYSE: TEVA) was raised to Buy from Neutral with a $23 price target (versus a $19.12 close) at Mizuho. Teva has a 52-week range of $10.85 to $37.94 and a consensus price target of $18.72.

Under Armour Inc. (NYSE: UAA) was downgraded to Negative from Neutral with an $11 price target (versus a $15.98 close) at Susquehanna. Under Armour has a 52-week range of $11.40 to $31.06 and a consensus price target of $13.87.

Wells Fargo & Co. (NYSE: WFC) was raised to Buy from Hold with a $73 price target (versus a $62.04 close) at Sandler O’Neill. Wells Fargo has a 52-week range of $49.27 to $63.05 and a consensus price target of $62.43.

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Other key analyst calls were shown as follows: