BUZZ — Amer Sports rises as Jefferies starts at 'buy'
* Shares of Wilson tennis racket maker Amer Sports gain 1.41% to $28.77 premarket * Jefferies starts coverage with "buy" rating; PT of $42 implies a 48% upside to stock's last close * Brokerage sees outdoor apparel brand Salomon a "compelling second engine of growth" and growth at Arc'teryx, known for its trail-running