A wave of local investor buying is compressing the premium on Taiwan Semiconductor Manufacturing Co.'s US-listed shares to a two-year low. These investors are piling into the chipmaker's stock in Taipei, betting that the AI boom still has room to run.

The narrowing gap reflects a shift in conviction: while Wall Street has priced in high expectations, local shareholders are now equally aggressive. This dynamic suggests that Taiwanese investors see sustained demand for TSMC’s advanced chips, which power everything from data centers to AI accelerators.

According to Bloomberg, the premium on TSMC’s American depositary receipts relative to its Taipei-listed shares has shrunk significantly. The metric, which can signal differing sentiment between markets, now stands at its narrowest in two years.

The move implies that local capital is chasing TSMC more aggressively than foreign money, potentially altering the stock’s risk profile. If the AI rally continues, this domestic support could provide a floor, but a sharp downturn might trigger a synchronized selloff.

Counter argument: Some analysts warn that local momentum may be overheated, as retail buying often lags institutional moves. If AI demand disappoints, the narrowed premium could widen again quickly, leaving Taipei investors exposed.