2308.TW · PEAD → 10

Print-day reaction was +1.9% versus the prior close, a modest lift despite the EPS miss. The overnight gap to T+1 open extended the move by an additional +2.5%, suggesting initial after-hours enthusiasm. Over the following two trading days, however, price drifted flat — a net 0.0% move from T+1 close to T+3 close, offering no continuation. Cumulative abnormal return of +1.0% versus SPY falls short of the ±3% PEAD threshold, producing a none verdict; the signal holds through 2026-07-27 with conviction 10.