Why Is Monolithic Power Systems Stock Going Up

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Shares of Monolithic Power Systems (MPWR) rose 16.6% on Monday, November 9, 2026, while the S&P 500 gained 2.3%. The company released no announcement, earnings report, or filing around the move. Wall Street was rebounding from a steep sell-off in global technology stocks the week before, and the Nasdaq Composite rose 2.7%. So what in Monolithic Power's business ties it to that swing in technology stocks?

Monolithic Power Expects Enterprise Data To Grow Fastest

Management said on the October 29, 2026 call that enterprise data will be Monolithic Power's fastest-growing end market in 2026. The company saw strong demand there from existing customers in the third quarter and expects it to continue into 2027.

Third-quarter revenue reached $1.2 billion, up 63.1% from a year earlier. One market analysis credited that growth to rising AI accelerator demand and higher-value power modules, and said the mix keeps the company heavily tied to AI investment cycles.

That tie showed before Monday's gain, as the shares fell sharply amid doubts about the AI sector. They dropped 5.1% on November 4 and 10.3% on November 5, then rose 5.2% on November 6, the session before.

All Five Peers Gained Less Than Monolithic Power

All five companies on the Trefis peer list for Monolithic Power rose during the same session, led by ON Semiconductor at 9.2% and Analog Devices at 8.6%. XLK, the SPDR fund for the information technology sector, gained 3.7%. Monolithic Power moved the same way as its group, but rose far more than any company in it.

The Biggest Gain For Monolithic Power In A Year

Monolithic Power stock had not moved this much in a single session, up or down, in the prior 365 days. Over the past twelve months, the stock returned 45.9%, against 13.7% for the S&P 500.

That gain came in the first half of those twelve months: over the past six months the stock returned -16.2%, while the S&P 500 returned 2.4%. The shares hit their highest close of the past year, $1,689.89, on June 3, 2026, up from their lowest, $856.96, on November 18, 2025. Monday's close of $1,388.05 was about 18% below that high.

Investors pay 18.2 times sales for the stock, against 3.1 times for the S&P 500. Monolithic Power is expected to report its fourth-quarter 2026 results in February 2027, and revenue growth from a year earlier is the figure to watch.

Does This Mean You Should Act On MPWR?

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