U.S. stocks tumbled in volatile trading as surging infections exacerbated concerns over the global economic impact. Tuesday's Senate runoffs in Georgia contributed to jitters, with all major indexes down by 2% or more. Treasuries were little changed. The 10-year breakeven rate, a measure that draws on pricing for inflation-linked Treasuries, rose as high as 2.01%, a level last seen more than two years ago. The dollar was mixed, with the pound the worst G-10 performer. Oil declined, while gold jumped. Asian equity futures are in the red.