Closing Bell: Chip Stocks Gain, O'Reilly Slumps, JB Hunt Falls

Today's biggest winners and losers in the stock market.
On this episode of Stock Movers:

Listen for comprehensive cross-platform coverage of the US market close as heard on Bloomberg Television, Bloomberg Radio, and YouTube with Romaine Bostick, Katie Griefeld, Carol Massar and Emily Graffeo

- A powerful rebound in semiconductor stocks lifted Wall Street on Monday, driving the tech-heavy Nasdaq 100 sharply higher, as investors dumped defensive corners of the market in a broad risk-on rotation. The session’s driving force was memory. A DRAM-sector surge rippled across chipmakers ahead of Samsung‘s quarterly sales updates and SK Hynix‘s planned U.S. listing this Friday, with the market betting the artificial-intelligence trade that has powered the bull run still has room to run.

-Shares of O’Reilly Automotive (ORLY) extend Thursday’s decline, dropping 7.0% to the lowest level since January 2025 after last week’s report that the firm has expressed interest in acquiring Genuine Parts Co.’s auto-parts segment. Just before the holiday weekend, Bloomberg reported that O'Reilly may be willing to spend $10 billion or more in a cash bid for the auto parts arm of Genuine Parts. The news comes after Genuine Parts announced in February that it would split the company, breaking up the automotive and industrial sides of the business in the first quarter of 2027. O'Reilly did not return requests for comment. Broadcom (AVGO) gained 3.8%

- JB Hunt Transport Services (JBHT) shares are down 2% premarket after Morgan Stanley analyst Ravi Shanker cut the recommendation on the intermodal freight carrier to underweight from equal-weight. The stock’s valuation is “unjustifiable” after a rally, and intermodal carriers will benefit from an upturn in the freight transportation sector “with later and smaller gains than the market expects,” the analyst wrote in a note.

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