Dow down almost 1%

The Dow fell 100.90, or 0.9%, to 10,609.65 last night, the biggest drop since it lost 120 points on the final day of 2009.

The broader Standard & Poor’s 500 index fell 12.43, or 1.1 %, to 1,136.03, and the Nasdaq composite index fell 28.75, or 1.2%, to 2,287.99.