Taiwan's stock market suffered a historic one-day crash, and regulators scrambled to calm panicked investors with emergency measures.

• Taiwan's main index plunged over 3,700 points at one point, the biggest intraday drop ever recorded, before closing down about 1,873 points — the fourth-worst close in history.
• The sell-off was triggered by fallout from the US midterm elections, which raised fears about tighter AI data center rules, hitting AI and chip stocks worldwide, including major Taiwan tech names.
• Foreign investors dumped huge amounts of Taiwan stock, with chipmaker TSMC alone seeing billions pulled out in a single day.
• Regulators responded by restricting short-selling starting Monday, encouraging companies to buy back their own shares, and activating a national stabilization fund to prop up the market if needed.
• The government also tried to calm nerves, with officials publicly insisting Taiwan's industries remain fundamentally strong despite the plunge.

Outlook: Authorities are on standby to keep intervening, but the market's direction will likely hinge on whether global worries about AI spending and chip stocks ease in the coming days.