South Korea's Kospi index suffered a record 33% plunge in July, pushing its valuation to an all-time low and seemingly flashing a classic buy-the-dip signal. However, global investors such as Pictet Asset Management, Robeco, and Eastspring Investments have not returned to the market.

For them, the extreme volatility of South Korean stocks remains too much to handle. Before the July crash, the market had been one of the best-performing globally this year, yet it also experienced nine circuit breakers triggered by the Kospi index falling at least 8% each time.

The reluctance of these funds to step in highlights how volatility has become a defining characteristic of the Korean market, primarily driven by the heavy concentration of capital in Samsung Electronics and SK Hynix, as well as the leveraged ETFs linked to them. During the bull run, this risk was overlooked; now, investors are demanding a higher margin of safety before increasing their holdings.

The valuations and outlook of these two AI chip leaders are no longer sufficient to justify funds buying the dip on every pullback. "As an institutional investor in global equities, the biggest problem with Korea is the high volatility," said Young Jae Lee, Senior Investment Manager at Pictet. "You can't put money into a market that feels too much like gambling."

Another sign of escalating market turbulence is the Kospi 200 Volatility Index, often called Korea's "fear index," which has surged to 87, more than triple its December level. Global funds have already net sold $12 billion this month and are rethinking how to navigate such market swings.

"We do see some interesting valuations in Korea, but it has become much harder to buy the dip now," said Ian Samson, a multi-asset portfolio manager at Fidelity International. "The sheer volatility means that from a portfolio construction perspective, we have to avoid being too aggressive in buying."

Robeco acknowledges that Korean stock valuations have become attractive, but it remains wary of the volatility. "We are not adding to Korea at the moment, but we are closely evaluating," said Joshua Crabb, Head of Asia Pacific Equities based in Hong Kong. "We are waiting for the market to stabilize a bit more," he added.