Wall Street's major indexes opened lower on Monday as rising U.S. Treasury yields amid prospects of aggressive monetary policy tightening weighed on growth stocks, with the sentiment taking a hit from fears of an economic slowdown in China.

The Dow Jones Industrial Average fell 214.2 points, or 0.65%, at the open to 32685.17. The S&P 500 fell 42.1 points, or 1.02%, at the open to 4081.27, while the Nasdaq Composite dropped 221.6 points, or 1.82%, to 11923.029 at the opening bell.

By 9:51 a.m. EST, the Dow and the S&P were both down further, by 1.21% and 1.60%, respectively. Nasdaq was down only slightly more, to negative 1.85%