Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

- eBay (EBAY) shares rallied on news that GameStop is trying to buy it for about $56 billion in cash and stock. EBay said Monday that it would review the offer “with a focus on the value to be delivered to eBay shareholders, including the value of the GameStop stock consideration and the ability of GameStop to deliver a binding, actionable proposal.”

- Tyson (TSN)'s shares soared after the largest US meatpacker raised its full-year profit outlook, with strong protein demand enabling growth even as the its beef segment continued to slump.The largest US meatpacker said it sees adjusted operating income between $2.2 billion and $2.4 billion in the fiscal year, up $100 million from its prior range. A greater consumer appetite for protein has supported more chicken and pork purchases, while also allowing Tyson to pass through higher beef prices to offset the impacts of costly US cattle supplies.

- UPS (UPS) dropped more than 10% in trading today along with other US transportation stocks after Amazon announced expanded logistics offerings that will turn it into a major competitor for parcel carriers and air freight companies, and also impact truckers and third-party brokers.