South Korea's KOSPI index fell 4.87% on Monday, Aug. 4, after investors had been shunning overseas stocks, particularly semiconductors, in a broad-based sell-off in search of profits after a record rally on Friday. The drop is stark, reflecting the increased volatility of South Korea's stocks this year, a setback for the KOSPI, which is still higher by 49.36% year-to-date. Chip Stocks Lead Market DeclineTechnology shares bore the brunt of Monday's selloff after posting record gains just one trading session earlier. The retreat followed Friday's extraordinary rally, when Samsung shares surged 27%, and SK Hynix climbed 30%, both posting their largest single-day gains on record. SK Hynix lost 35% during July but has also posted substantial gains over the same period.