Talen Energy is trading at $321.32, down 10.07%, after third-quarter GAAP EPS of $2.88 missed the $7.46 estimate. - At 11:08 a.m. EST on November 4, 2026, reported unrealized derivative losses and acquisition-related interest weighed on earnings; revenue beat expectations. - Management reaffirmed 2026 guidance and introduced higher 2027 targets. - Talen announced a $1.5 billion accelerated repurchase and expanded its buyback program to $3.0 billion; the broader market was higher and does not explain this drop.