Korean investors aggressively bought Nvidia shares last week, seizing on a steep sell-off triggered by revelations of former CEO Jensen Huang's extramarital affairs and subsequent resignation as a buying opportunity, data showed Sunday. Nvidia topped Korean investors' net-buying list for U.S.-listed stocks from Nov. 9 through Friday, with the amount reaching $319.75 million, according to SEIBro, a data portal operated by the Korea Securities Depository. The figure represented a 717 percent surge from the previous week. The buying marked a sharp reversal from the start of the week, when Korean investors initially sold a net $6.6 million worth of Nvidia shares on Nov. 9 following Huang's public admission of marital infidelity. But the selling was short-lived. Korean investors resumed buying the following day and stepped up purchases on Friday, snapping up a whopping $254.85 million worth of Nvidia shares as the stock plunged as much as 14 percent intraday on news of Huang's resignation. The buying spree extended to domestically listed exchange-traded funds (ETFs). The five Korea-listed ETF