Which Mag 7 Stock Has the Biggest Single-Day Move in 2026?

This market will resolve according to the listed company whose stock records the largest single-day percentage move during calendar year 2026. Where a company has multiple publicly traded share classes, only the share class specified by the ticker in the listed group item title will be considered. For each stock, the single-day percentage move for a given trading day is calculated as the absolute value of (Close Price - Prior Close Price) ÷ Prior Close Price. The Prior Close Price for a given trading day is the Close Price for the most recent prior trading day on which the primary exchange held a regular trading session; for the first eligible day of 2026, the Prior Close Price is the Close Price for the final trading day of 2025. Overnight price changes between sessions are therefore included in each day’s move. Prices will be used exactly as published by Pyth, and percentage moves will be calculated to the full precision, without rounding, after applying any corporate action adjustment described below. An eligible day is any day in calendar year 2026 on which the primary exchange for the listed security holds a regular trading session, including scheduled shortened sessions. Only prices achieved during the regular trading hours of the primary exchange on which the listed security trades (typically 9:30 AM – 4:00 PM ET) will be considered. … (condensed)