THREE FOR FOUR: Disappointing earnings from a range of companies pushed the stock market lower on Thursday, giving major indexes their third loss this week.

WEAK: Shares in Morgan Stanley, UnitedHealth Group and other companies sank after they turned in weaker quarterly results. Profit slipped at Morgan Stanley as the bank made less money from trading bonds and commodities, a theme for many investment banks this earnings season.

FINAL SCORE: The Standard & Poor's 500 index lost 10.40 points to close at 1,541.61, down 0.7 percent. The Dow Jones industrial average fell 81.45 points to 14,537.14, down 0.6 percent.