Taiwan's main index swung wildly but closed sharply higher, a relief for investors after an ugly morning.

• Stocks opened deep in the red as weak US chip shares dragged down markets across Asia, and the index briefly fell hundreds of points.
• Big electronics names like MediaTek and Delta led the selling, with PCB, memory, and component stocks all falling; shipping stocks held up.
• Buyers came back in the afternoon, TSMC turned positive, and the index closed at the day's high — a nearly 960-point swing from low to high.
• Big institutions were still net sellers, and foreign investors now hold a large pile of bets against the index through futures.

Outlook: Trading is likely to go sideways with more big swings, and this week's Fed chair remarks plus Nvidia and Marvell earnings will set the tone.