MPWR · PEAD → 0

Monolithic Power Systems reported Q2 2026 EPS of $5.41 on 2026-07-30, beating the $4.84 consensus by $0.57 (+11.8%).

Print-day reaction was +5.4% versus the prior close, a sharp move that pushed MPWR well above its pre-earnings level. The overnight gap to the T+1 open extended a further +13.9%, signalling strong after-hours conviction following the beat. Days 1–3 drift told a different story: the stock gave back –6.4% from the T+1 close to the T+3 close, erasing most of the gap premium. Cumulative abnormal return of +1.2% versus SPY.US sits inside the ±3% neutral band, yielding a PEAD direction of none with zero conviction; the holding window runs through 2026-10-27.