Tokyo stocks tumbled Monday, with the Nikkei 225 index logging its biggest point loss since Dec. 25 on rekindled concerns over the global economy following the release of sluggish U.S. and European economic data.

Investors ditched shares and fled to the safety of bonds as risk assets fell out of favor on growing fears of a U.S. recession, sending global yields plunging.

The Nikkei ended the day 650.23 points, or 3.01 percent, lower at 20,977.11, its lowest close since Feb. 15. The broader Topix, which covers all first section issues on the Tokyo Stock Exchange, finished 39.70 points, or 2.45 percent, in the red at 1,577.41.