The KOSPI index declined 4.58 percent to close at 6,296.38 on August 6, with SK Hynix dropping 10 percent and foreign investors selling a net 3.33 trillion won. Trading volume reached 281.8 million shares, a sell-side sidecar was triggered briefly, and domestic individuals bought nearly all shares sold by foreigners. Overnight U.S. moves showed the Nasdaq down 0.83 percent while the Dow rose to a record.