Korea Exchange will formally begin after-hours ETF trading on Sept. 14, a step reported on Aug. 7 as the bourse seeks to compete with alternative trading system Nextrade and 24-hour cryptocurrency exchanges. Asset managers have warned that the lack of real-time indicative net asset value estimates could increase ETF price deviations, and the industry had earlier urged the exchange to delay the rollout. Single-stock leveraged ETFs will be excluded from the after-hours trading lineup.