Here are the biggest calls on Wall Street on Tuesday: Wells Fargo upgrades Eastman Chemical to overweight from equal weight Wells Fargo says the chemical company is "attractive." HSBC downgrades Goldman Sachs & Morgan Stanley to hold from buy HSBC said the risk/reward is a less attractive. KeyBanc reiterates Nvidia as overweight The firm says it sees "limited competitive risks" for Nvidia shares. Wells Fargo reiterates Starbucks as overweight Wells raised its price target on the stock to $115 per share from $110. Redburn Atlantic Equities reiterates Amazon as buy The firm raised its price target on the stock to $235 per share from $225.

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Persons: Wells Fargo, HSBC downgrades Goldman Sachs, Morgan Stanley, Baird, Bernstein, KeyBanc, it's bullish, TD Cowen, Pinterest, Cowen, Wells, Guggenheim, Michael Kors, UAL Organizations: Eastman Chemical, UBS, HSBC, Royal Caribbean, Nvidia, Bank of America, Citi, Chevron, ExxonMobil, SPX, JV, China, Guggenheim, Capri Holdings, Barclays, Apple, and Department of Justice, Google, DoJ, UBS reinstates United, Alaska Airlines, Amazon Web Services, Anheuser, Busch InBev, GAP Locations: Caribbean, China, Delta, DAL