Asia report: Stocks tank as bond sell-off intensifies

19th Aug 2026 12:32

(Sharecast News) - Asian stocks were sold off sharply on Wednesday, with heavy falls across Tokyo, Shanghai and Seoul as rising bond yields continued to hammer investor sentiment.

Long-term government bonds have fallen significantly over recent sessions, with 10-year bond yields in the US, UK, Japan, Germany and France all at levels not seen in at least two decades.

Japan's 10-year bond yield rose to a high of 2.95% on Tuesday, a level not seen since 1996, as investors continue to price in faster-than-expected monetary policy tightening by the Bank of Japan.

Tech and chip stocks were bearing the brunt of the selling pressure on Wednesday, with South Korea's KOSPI index - widely viewed as a proxy investment play for the AI hardware and infrastructure sector - tumbling 5.8%, as heavyweights Mirae Corp, SK Square and SK Hynix all fell 10% or more.

"Semiconductor stocks resumed their rollercoaster ride and a global sell-off of bonds sent yields to multi-decade highs as investor sentiment sagged in the face of these twin concerns," said Richard Hunter, head of markets at Interactive Investor.

"Persistent inflationary concerns are worsening due to elevated oil prices, which weighs especially on those countries with an extra reliance on energy imports such as the UK and Japan. [...] Quite apart from inflationary worries, there is an increasing sense of discomfort with the general level of government debt, which has been rising steeply over recent years and of late has been heightened by more spending on lines such as defence," Hunter said.

Japan's Nikkei 225 also dropped 3.2%, with tech investment giant SoftBank tanking more than 10%. Amid increasing concerns about the scale and sustainability of global AI investments, SoftBank was making headlines on reports it is planning a JPY1trn retail bond issue - the largest in Japan's history - to fund AI initiatives.

Elsewhere, the Shanghai Composite fell 2.4%. Elsewhere, the Hang Seng in Hong Kong gained 0.1%, Bombay's Sensex fell 0.4% and the STI in Singapore slipped 0.1%.