Dow futures bounced more than 200 points Tuesday, one day after the 30-stock average had its worst session in eight months. To start the week, the Dow sank 725 points, or over 2%, as the spread of the delta variant led to a sharp rise in Covid cases in the U.S. and around the world.

The 10-year Treasury yield dropped early Tuesday, trading briefly below 1.17% and touching new five month lows, before ticking higher. Recently falling yields, which move inversely to bond prices, added some pressure to premarket stock trading, reflecting heightened concerns about whether the resurgence of Covid wil derail global economic growth.