Monolithic Power Systems Inc. (MPWR)

Monolithic Power Systems Inc. (MPWR) has rallied hard into the week of November 11, 2026: the stock rose 17.26% over one week and closed up 8.92% in the last session, on volume 25.6% below its average. Analysts were already positive after the October 29, 2026 report, when adjusted EPS of $8.19 beat the $7.75 estimate by 5.68%, and the price rose 1.07% in the first session after it. The rally has lifted the stock to 73% of its 52-week range, but it still trades at a steep premium on earnings and sales, which is the main tension for anyone weighing the shares now.

The shares rose 17.26% over the past week and 8.92% in the last session, while volume finished 25.6% below its average. The advance followed a run of analyst support, with all 16 current ratings at Buy or Strong Buy. Truist Securities kept its Buy rating on October 30, 2026, and Rosenblatt upgraded the stock to Buy from Neutral the same day. Oppenheimer, Wells Fargo and TD Cowen also reiterated positive ratings in the weeks before.

Monolithic Power has beaten the EPS estimate in all 8 of the reports on record. The October 29, 2026 report delivered adjusted EPS of $8.19 against $7.75 expected, a 5.68% beat. The July 30, 2026 report beat by 10.54% and was followed by an 8.35% rise. The reaction has not always followed the beat: 2 of the 8 beats were followed by a lower share price in the first session, so a beat alone has not guaranteed a gain.

Revenue grew 47.56% in the latest quarter compared with the same quarter a year earlier, against a sector median of 24.2%. The net profit margin is 23.9%, the operating margin is 29.50%, and return on equity is 24.47%, against a sector median of 13.4%. Debt-to-equity is 0.01, so the company carries almost no borrowing. Those figures explain why analysts expect the earnings growth to continue.

At a trailing P/E of 74.42, the stock trades at a premium of 112.0% to the sector median P/E of 35.1. Trailing GAAP EPS is $19.87, so the premium rests on forward expectations of $29.24 for this year. Insiders have sold $711.9M of stock over the last 18 months in 67 sales and made no open-market purchases.

The base case is that the business keeps growing faster than its sector while the stock trades on expectations. Analysts expect EPS to rise 64.6% this year to $29.24 and a further 58.5% next year to $46.34, and revenue to grow 55.4% to $4.3B. If those estimates hold and the next reports keep beating, the shares have room to test the analysts' median 12-month target of $1,810.00, which sits 22.4% above the price, and the lowest target of $1,500.00 would still be above the current price. The case weakens if quarterly growth slows from the 47.56% pace in the latest quarter, or if the stock gives back the sharp one-week gain of 17.26% and falls toward its moving averages. Consensus is Strong Buy with 16 of 16 analysts rating it buy, but the trailing P/E of 74.42 means that any shortfall against those estimates could be punished sharply.

Support sits first at the 200-day simple moving average of $1,325.85, which the price has held above. Below it lies the 20-day exponential moving average at $1,283.32, then the 50-day simple moving average at $1,276.88; these three averages sit close together, so a fall through them would be a single broad test rather than three separate ones. The lowest support level is the 52-week low of $833.18. On the upside, the first resistance is the 52-week high of $1,714.09, the top of the range and the level a further rise would meet first. The analysts' median target of $1,810.00 lies beyond that high and is a forecast, not a technical level.