As skepticism grows over the sustainability of artificial intelligence infrastructure investments, Asian semiconductor-related stocks, including Samsung Electronics and SK Hynix, experienced widespread sell-offs on the 28th.

The declines were particularly pronounced in Japan.

As of 2:20 p.m. Korea time on the 28th, Japan's Nikkei 225 index plummeted by more than 4%, falling below the 62,000 mark for the first time since late May, while the TOPIX also dropped by about 3%.

NAND flash manufacturer Kioxia plunged 18.3% to 44,550 yen, shrinking its market capitalization to approximately 219 trillion won in Korean currency.

Semiconductor equipment stocks also weakened together, including Tokyo Electron (-11.2%), Renesas (-10.6%), Lasertec (-14.4%), and Advantest (-10.4%).

Taiwan was similarly engulfed in a wave of selling.

Taiwan's Taiex index sank by over 4% during the session, sliding down to the 41,600 range.

TSMC, which accounts for more than 40% of Taiwan's stock market capitalization, extended its losses, trading down 2.8% at 2,285 Taiwan dollars.

Consequently, its market capitalization also decreased to about 2,672 trillion won.

Taiwanese semiconductor design firm MediaTek was also trading at a price down by 9.9%.

The South Korean stock market was no exception.

The KOSPI plummeted by more than 10% on this day, triggering a circuit breaker, while the KOSDAQ also dropped over 8%, leading to a temporary suspension of trading for both.

Samsung Electronics and SK Hynix widened their losses, sliding by 12% to 13% each.

This synchronized plunge in Asian semiconductor stocks is interpreted as a result of spreading doubts regarding the sustainability of US-origin AI infrastructure investments.

Following Google parent Alphabet's disclosure of a second-quarter free cash flow deficit, Nvidia's stock price also recently tumbled, relinquishing its position as the world's top company by market cap to Apple.

Concerns that soaring memory prices could instead trigger demand contraction or a shift to substitutes are also weighing heavily on investor sentiment.