Bitcoin plunges up to 8% and South Korea's Kospi sinks nearly 4% in the latest tech-led sell-off

Shares have retreated in Asia on heavy selling of technology stocks, while the price of bitcoin fell as much as 8%. South Korea's Kospi dropped nearly 4%, while U.S. futures edged lower. Oil prices sank more than $1 a barrel. On Wednesday, the S&P 500 fell 0.5% for its fifth modest loss in the last six days. The Dow Jones Industrial Average rose 0.5%, and the Nasdaq composite sank 1.5%. More than twice as many stocks rose within the S&P 500 than fell, but the index sank as Advanced Micro Devices and other influential tech stocks weakened. AMD dropped even though the chip company reported a stronger profit for the latest quarter than analysts expected.