TSMC completed its NT$7 ex-dividend gap fill at 9:27 a.m. on the 16th, ending a record run of 23 consecutive instant fills and four straight quarters of same-day fills. The stock opened at NT$2,375, initially traded NT$5 below its ex-dividend reference price and then recovered the adjustment. The session followed the record NT$7.00000137 first-quarter cash dividend, estimated to total NT$181.53 billion, or about $5.7 billion, with the 15th as the final buying session and payments scheduled for October 8. Taiwan shares briefly gained more than 180 points but remained in low-volume consolidation as the US 10-year Treasury yield exceeded 5% at a 19-year high, investors awaited the Federal Reserve decision, and foreign investors held 83,223 net short Taiwan Index Futures contracts. TSMC's operating outlook remained strong, with August 2026 revenue up 53.3% year over year to NT$514.806 billion, first-eight-month revenue up 39.3% to NT$3.38687 trillion, third-quarter guidance of $44.6 billion-$45.8 billion and 2026 capital expenditure guidance of $60 billion-$64 billion.