Asian stocks fall as KOSPI, Nikkei lead tech selloff before Nvidia earnings

Asian stocks fell Tuesday as the KOSPI and Nikkei led a technology selloff ahead of Nvidia's earnings, with investors reducing risk. The KOSPI dropped as much as 3.7% before paring losses to about 1.8%, while the Nikkei 225 fell 0.8% to 64,980, extending losses to a third session. Samsung Electronics and SK Hynix declined, with foreign investors selling a net 2.11 trillion won in Korean shares. The selloff reflects disappointment over Samsung's shareholder return plan and high expectations for Nvidia's quarterly revenue of about $92 billion. The yen near 159 per dollar supports Japanese exporters, but caution persists ahead of the Fed's Jackson Hole speech on Friday.