Foreign portfolio managers sold NT$758.52 billion on the Taiwan Stock Exchange cash market Thursday, helping pull the capitalization-weighted gauge down 492.93 points to 49,313.44 in the last full session before the National Day holiday closure.
Session mechanics
Turnover reached NT$869.7 billion, according to Taiwan Index Plus and CTEE data cited in market wraps. TSMC fell 1.35 percent, MediaTek lost 3 percent, and Foxconn declined 1.19 percent, while ASE and several flu-related medical names bucked the trend.
Combined foreign selling over three sessions totaled NT$898.95 billion, a sharp reversal from Monday’s NT$718.97 billion buy that had helped drive a 1,236-point rally. Local desks described the flow as profit-taking into a long weekend rather than a macro shock, though U.S. bond yields and softer Wall Street tech prints added caution.
Weekly context still positive
Despite Thursday’s drop, the index gained 837.7 points for the week, or 1.73 percent, marking a fourth straight weekly advance. Total market capitalization of listed companies stood at NT$161.36 trillion.
Analysts noted the index failed to hold above its five-day moving average after nearing the psychologically important 50,000 handle earlier in the week. Chien Po-yi of Sinotrade pointed to the 10-day average near 48,700 as the next support band if selling persists after the holiday.
Sector rotation on the tape
Memory and packaging names attracted interest on supply fears tied to labor talks at major fabs, while high-priced AI leaders gave back ground. Disease-prevention stocks hit daily limits as the CDC reported rising severe flu outcomes, illustrating how health headlines can steer liquidity on down days.
Electronic component makers with October price increases also drew bids, suggesting some funds rotated out of a concentrated AI basket into smaller cyclical names with visible order books.
Holiday calendar effect
The exchange will be closed Friday for National Day, compressing hedging activity into Thursday’s cash session. Futures and overseas ADR trading will still give offshore investors tools to express views, but local retail order flow disappears until next week.
Desk strategists said the pause could let volatility decay if U.S. markets stabilize over the long weekend. A messy reopen would likely start with foreign flows into TSMC and the other cap-weighted names that drove both the rally and the pullback.
What holders should track
Watch whether foreign selling continues at the NT$200-billion-plus daily pace seen midweek or moderates toward historical averages near NT$50 billion. Margin maintenance levels and short-term structured product rolls can amplify moves around holiday gaps.
For index watchers, the 50,000 mark remains the narrative line even after Thursday’s retreat. Clearing it on sustained volume would require foreign buyers to return to leaders; until then, expect choppy consolidation with sector stories—flu names, passives, memory—doing the heavy lifting on breadth.