Reddit — Shares rose more than 2% after Jefferies initiated research coverage with a buy rating and a Sreet-high price target. Rio Tinto , Arcadium Lithium — The two minerals stocks moved in opposite directions after the companies announced a deal for Rio Tinto to buy Arcadium for $5.85 per share. Shares of Rio Tinto dipped 1.2%, while shares of Arcadium surged 30%. GitLab — Shares rose 5% after Morgan Stanley initiated research coverage of the software stock with an overweight rating . Chewy — Shares rose nearly 2% after TD Cowen initiated research coverage of the pet products retailer with a buy rating.

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Persons: Jefferies, Blackstone — Piper Sandler, Morgan Stanley, Sanjit Singh, Nio, TD Cowen, — CNBC's Sean Conlon, Lisa Han, Alex Harring, Jesse Pound, Hakyung Kim Organizations: Boeing, Department, Rio Tinto, Federal, Cruise, Citigroup, Citi Locations: Rio, Arcadium, Nio —