South Korean Stocks Now Guide Global AI Trading

South Korea's equity market now serves as an early signal for global technology shares. Fund managers in London, New York, and Tokyo check South Korean stocks before trading opens, according to the report. The $4 trillion market moves ahead of swings in major chip stocks worldwide.

A London-based portfolio manager at PineBridge Investments said the change has altered daily routines. "We are all Korean investors now," the manager stated. Japanese traders have added the Kospi Index to their watch lists.

The Kospi has become one of the world's most volatile major benchmarks. Leveraged trading has amplified price swings, the report said. SK Hynix's recent U.S. listing has extended Korea's reach into Wall Street trading. Data compiled by Bloomberg shows the 60-day correlation between the Kospi and the Nasdaq 100 reached 0.46, near a two-year high.

The same measure averaged 0.16 over the past five years. A measure of the Nasdaq 100's sensitivity to Kospi weakness hit its highest level since 1990 on July 7.

A local selloff on Monday triggered a near 9% drop in the Kospi. The decline spread to Wall Street, where SK Hynix's U.S.-listed shares fell 9.3%. Global chip stocks also declined on Friday after a Chinese AI startup announced a breakthrough. The Kospi Index has fallen 25% since its June peak, erasing $1 trillion in market value.

Samsung Electronics and SK Hynix have each lost at least 30% of their value since that peak. The benchmark remains up 62% for the year. South Korea temporarily halted new listings of single-stock leveraged exchange-traded products to reduce speculation.

A Japan equity strategist at UBS SuMi TRUST Wealth Management said the pattern reflects the current AI investment cycle.