Boeing CEO Kelly Ortberg said a "mountain of work" remains before certifying the long-delayed 777X, with first deliveries unlikely before 2026. Shares slid 3.3%, extending a weeklong decline, but retail traders on Stocktwits turned bullish, calling sub-$220 levels a "steal". Ortberg noted 737 MAX output should rise to 42/month by year-end, with 787 rates also increasing.