Updated from 4:04 p.m. EDTThe Dow ended the holiday-shortened week decidedly lower Thursday as strong earnings news from General Electric ( GE) , Yahoo! ( YHOO) and Dell ( DELL) couldn't take investors' minds off war. After popping to 10,554 earlier, the Dow closed down 38.12 points, or 0.36%, to 10,442.03. The S&P 500 lost 1.20 points, or 0.11%, to 1139.33, while the Nasdaq -- which rose 1% in early trading -- clung to a gain of 2.62 points, or 0.13%, to 2052.86. The markets are closed for Good Friday. The 10-year Treasury bond ended down 11/32 in price to yield 4.2%, while the dollar was stronger against the euro and yen. All of the major indices ended slightly lower for the week, despite a healthy rally Monday and broad gains in the week before. The S&P 500 lost about 2 points, or 0.2%; the Dow fell about 0.3%; and the Nasdaq shed 0.2%. Volume on the New York Stock Exchange approached 1.2 billion shares, and decliners outnumbered advancers by about 2 to 1. On the Nasdaq, almost 1.7 billion shares changed hands and decliners outpaced advancers by about 5 to 4. "I think we were a little overbought there, and people are letting some things go before the holiday weekend," said John Hughes, equity strategist at Shields & Co. "Geopolitical concerns and the impact it's going to have on the election make it seem like there's a lot of negatives out there, so you have some profit-taking." Peter Dunay, chief market strategist at Wall Street Access, said Iraq was emerging as a prime influence on the markets. "This becomes a major turning point in Iraq," he said. "If the violence eases up in the next couple of weeks to the occasional sabotage events, then the market will continue to believe that we have control over the situation and it's just a matter of when we can transfer power. But if things continue to escalate, the costs will be monstrous, and that uncertainty will dominate trading."