Business

NEW YORK - Stocks ended a volatile week with another sell-off Friday while credit markets remained strained after enthusiasm over the government's $700 billion financial rescue plan gave way to worries about obstacles still facing the economy.

Investors dumped stocks late in the session after a big intraday rally, repeating a defensive move seen throughout the yearlong market pullback. As lawmakers voted on the plan, which President Bush quickly signed into law, the Dow advanced more than 300 points. After it passed, the blue chips moved in and out of positive territory before ending down more than 150 points.

By close, the Dow had fallen 157.47, or 1.50 percent, to 10,325.38 after rising more than 310 points. The Standard & Poor's 500 index fell 15.05, or 1.35 percent, to 1,099.23, and the Nasdaq composite index fell 29.33, or 1.48 percent, to 1,947.39.