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

On this episode of Stock Movers:

- Alibaba (BABA) is tumbling after announcing a plan to raise about HK$80 billion ($10.2 billion) from a share sale. The share placement is expected to dilute earnings and hurt stock performance in the near term, analysts said. Meanwhile, the fundraising will help drive AI-led growth and the impact on earnings will be limited if the company can improve AI payoffs, they added. The tech and chip sectors are seeing a broader selloff globally.

- Steel Dynamics (STLD) and other US steel firms are driving higher as Nucor, Steel Dynamics, Cleveland-Cliffs and Century Aluminum are likely winners from U.S.-Canada trade talks breaking down. All four stocks were higher early Monday after tumbling last week on the prospect of a Canada trade deal that would lower U.S. tariffs on steel and aluminum.

- Applied Optoelectronics (AAOI) is declining as it launched a $600 million at-the-market equity offering, which raised dilution concerns among investors.