Taiwan’s retail investors are heavily borrowing to leverage the AI boom, with margin debt surpassing $13 billion-its highest since September 2000.
The surge is fueled by TSMC, the chipmaker responsible for much of the global AI infrastructure, now representing over 40% of Taiwan’s stock index. Its shares have surged more than 100% year-over-year, compelling a dramatic uptick in borrowing.
In late May and early June of 2026 alone, margin debt surged by NT$21.3 billion, around $680 million, in just one day, reflecting retail investor eagerness.
Taiwan's equity market capitalization reached approximately $4.95 trillion, temporarily exceeding that of India. The benchmark index peaked near 45,614 points in early June, marking a 25-year record.
Recently, Taiwan’s Financial Supervisory Commission allowed equity funds to invest 25% of their assets in a single stock, directly benefiting TSMC, the only viable candidate for such concentration.
The market exhibits a P/E ratio near 21, lower than Nasdaq's, indicating that TSMC’s earnings support its valuation despite debate over a potential AI bubble.
Geopolitical tensions complicate the outlook, as Taiwan’s position at the center of US-China relations has led to significant foreign selling amidst domestic borrowing to buy affected stocks.
With over 40% concentration in one company, risks heighten. Market dynamics will hinge on TSMC's ongoing earnings performance amidst potential geopolitical shifts. If demand for AI chips slows, the $13 billion in margin debt could ignite instability rather than drive growth.