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

On this episode of Stock Movers:

- Shares of Mattel (MAT) tumbled ahead of the US market open after the toymaker’s 2026 adjusted earnings-per-share forecast missed the average analyst estimate, triggering a downgrade at JPMorgan. Mattel will also spend $159 million to buy NetEase’s stake in a joint venture to boost its mobile-gaming business. Fourth-quarter earnings excluding some items totaled 39 cents a share, the company said in a statement on Tuesday. While that was higher than a year ago, profit missed the 54-cent average of analysts’ estimates. Sales grew to $1.77 billion, compared with estimates of $1.84 billion.

- Shares of Lyft (LYFT) moved lower in the premarket session after the company issued a disappointing forecast that missed Wall Street expectations, a sign that its global expansion and new product offerings are not performing as quickly and as well as anticipated. The company said first quarter adjusted Ebitda, or earnings before interest, taxes, depreciation and amortization, will come in between $120 million and $140 million, missing estimates of $140.5 million. Fourth quarter revenue also came in below expectations, rising 3% to $1.59 billion. Wall Street had been looking for $1.76 billion.

- Shares of Kraft Heinz (KHC) fell in early trading after the packaged food company “pauses” its plan to split into two separate companies and announces an incremental $600 million business investment as sales results and outlook continue to disappoint. Steve Cahillane, who took over as CEO on Jan. 1., said he made the decision to temporarily halt the split to concentrate on bolstering profitability. He also pointed to worsening consumer sentiment since the separation was announced in September.

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