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South Korean stocks plunge over 5% in August, as chipmakers are the main culprits

South Korean shares closed more than 5% down on Monday. The start of August was a rough one as investors sold off the heavyweight chipmakers after a record rally in the previous session. The benchmark KOSPI index fell 5.1% to 6,257.45 after surging by 18% in the previous session. The gauge, however, fell 22.2% during July for its biggest monthly decline since October 2008.

The stock market in Seoul has been slashed due to a rapid winding down of leveraged bets on heavyweight chipmakers, and concerns about the durability of capital expenditures by AI hyperscalers.

The record Friday rally was followed by fresh selling on the Monday after, highlighting the fragile sentiment surrounding AI investments and the outsized impact of leveraged retail betting on the heavyweight chipmakers.

Samsung Electronics, and its rival SK Hynix, which together account for over half of the KOSPI Index, have shed 9% and 8,7% respectively.

"Today's drop is better interpreted as a rebalancing of positions rather than a fundamental change." Billy Leung is an investment strategist with Global X ETFs Australia. He said that Korean equities are now a "high beta proxy" for global AI sentiment.

The near-term path will remain volatile, given the amount of leverage in the system. However, the demand background underneath the volatility remains strong. William Bratton of BNP Paribas' Cash Equity Research in APAC says that the KOSPI volatility can be seen by the sharp swings this year. 32 of 42 daily movements of over 5% during the last decade occurred this year, as of July 31. Regulators introduced measures to limit the impact of highly volatile financial instruments. Investors remain unsure whether these measures will be enough to survive the current market slump.

Bratton noted that "our discussions with investors indicate a high level of frustration" because the current market volatility is overshadowing the fundamental story. Data showed that 'July exports exceeded market expectations due to a 179% increase in semiconductor shipments. A purchasing managers survey conducted by S&P Global also revealed that factory activity was expanding at a faster pace in July, based on the export demand.

Other automakers in the KOSPI were?Hyundai Motor, and Kia Corp, which is a sister company, both rose 1.3%, and fell 1.7%. According to exchange data, foreigners sold shares worth $2,826.2 billion ($1.98 billion), after selling a total amount of $9.86 trillion in July. According to a source, the won strengthened to 1,426.20 against the U.S. Dollar, but it remained below its 1,418-level reached last Thursday, after foreign exchange authorities made a rare dollar selling intervention.

(source: Reuters)