Can Monolithic Power Systems Stock Fall 30%?
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Monolithic Power Systems (MPWR) stock can fall 30% when the market turns, because it has done it before. From high to low, the shares have dropped that far or more in 5 of the 15 market shocks they have traded through. On November 6, 2026, the stock closed 29.3% below its highest close of the past year. Over the past month alone, it lost 13.1%, against 4.9% for the S&P 500. So how deep have its falls in market shocks gone, and how long did the stock stay down?
How Far Has Monolithic Power Stock Fallen In Shocks?
Monolithic Power recorded its deepest fall during the 2008-2009 financial crisis. The stock lost 65% from the first day of the crisis to its lowest close, while the S&P 500 lost 53%. More recently, the 2025 tariff shock pushed the shares down 34%, against 19% for the index. Across all the shocks, the stock fell 24% on average. The S&P 500 lost 15.8% over the same dates, and Monolithic Power fell further than the index in most of those periods.
The stock eventually climbed back to its peak close before the fall in each of the 14 shocks where it closed below its first-day price. The median climb back from the low took 1.3 months. Two recoveries took years, however: 56.0 months after the 2008-2009 crisis, and 30.2 months after the 2010 eurozone debt crisis.
A 56-month climb back to the old peak tests anyone. Here’s how to invest for whichever way the market breaks.
Monolithic Power Has Grown Larger And More Profitable
Sales at Monolithic Power over the twelve months to September 30, 2026 came to $3.74 billion, up 40.5% from a year earlier. That growth rate climbed from 11.6% in the twelve months to September 2024, and 30.5% in the twelve months to September 2025.
The twelve-month operating margin rose to 29.5% from 26.0% a year earlier. This figure sits higher than at 38 of the 40 quarter ends since fiscal Q4 2016. The company carries almost no debt, $0.02 billion against $1.09 billion of cash and short-term investments at September 30. Cash did not keep up with sales, however. Free cash flow over the latest twelve months fell to $0.61 billion, down from $0.71 billion a year earlier.
Where Is Monolithic Power Seeing Weakness Now?
On its October 29, 2026 call, management said Monolithic Power is seeing less strength in notebooks because of memory constraints further down the supply chain. Management described the business that sells into storage and notebooks as flat to up a couple of points from a year earlier, pairing strong storage sales with a limited market on the notebook side. Management also said it is still “pretty high” on what notebooks could be for the company over the long term.
That weakness sits inside a company still guiding for growth. Management expects revenue of $1.32 billion to $1.39 billion in fiscal Q4 2026, against the $1.2 billion reported in fiscal Q3. When Monolithic Power reports in February 2027, growth in that storage and notebook business from a year earlier will be the figure to watch.
Does This Mean You Should Act On MPWR?
Our purpose is to inform you with unique data so you make the right investment decisions. That said, betting on a single stock is always risky, no matter which direction you choose.
There is a smarter approach. Since its inception, the Trefis High Quality (HQ) Portfolio has returned 105%, beating the benchmark that combines the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000. And it did so without taking the concentrated risk that comes with do-it-yourself stock picking. If that is how you want to invest, the HQ Portfolio is the place to start.
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