Stocks are sliding for a fourth day on more worries about how Europe is handling its debt crisis.
The drop Friday comes a day after major indexes posted their biggest declines in more than a year. That pushed the market to "correction" mode, or a sharp decline from a recent peak.
Investors again looked to Europe for direction. The German parliament approved the country's share of a $1 trillion plan to help contain debt problems in Europe, but major European stock indexes still fell more than 1 percent.
The Dow Jones industrial average dropped below the psychological barrier of 10,000 and is down 100 at 9,965. The Standard & Poor's 500 index is down 11 at 1,060, while the Nasdaq composite index is down 31 at 2,173.
Futures pointed to further selling Friday after major stock indexes posted their biggest drops in more than a year and pushed the market to "correction" mode.
The euro rose to $1.2541 from $1.2464. The 16-nation currency has been a big driver of trading for weeks but many traders have been skeptical that any advances will be short-lived.
World markets have been falling on concerns that European debt problems will upend a global rebound. The fear is that huge deficits in countries including Greece and Portugal will cause a wave of bad debt to race through the world's financial system. Even if that is prevented, the prospect of heavier borrowing and sluggish growth has traders concerned.
The Dow Jones industrials tumbled 376 points Thursday. The Dow and broader indexes are now in correction territory by having dropped more than 10 percent from their 2010 highs last month. The drop has erased the gains major indexes had made in 2010.
Stock futures have been volatile. Dow futures fell 94, or 0.9 percent, to 9,962 after falling more than 100. Standard & Poor's 500 index futures fell 10.30, or 1 percent, to 1,059.70. Nasdaq 100 index futures fell 20.25, or 1.1 percent, to 1,780.25.
Bond prices rose, extending Thursday's gains when investors dumped anything seen as risky, including stocks and commodities. The yield on the benchmark 10-year Treasury note, which moves opposite its price, fell to 3.12 percent from 3.22 percent late Thursday.
Crude oil dropped $1.55 to $69.25 per barrel in electronic trading on the New York Mercantile Exchange. Gold prices fell.
Friday's trading could see added fractiousness because of the expiration of options contracts.
A slide at the open could push the Dow below the psychological benchmark of 10,000. The index fell below that level on May 6, when it lost nearly 1,000 points in an afternoon rout that was the biggest ever intraday slide. Regulators have said they are still unclear on what caused the brief drop.
Traders also will be focusing on the level of 1,065.79 in the S&P 500. That was the low for the index during the so-called "flash crash." Beyond that, traders will be watching to see whether the index can hold above its 2010 closing low of 1,056.74 from Feb. 8.
A breach of some of the levels widely monitored by traders could hasten selling. Computers programmed to sell investments when indexes hit certain levels can kick in and exacerbate the market's drop.
Analysts note, however, that major stock indexes ended below their average closing levels of the past 200 days. Some see that as a sign that markets have fallen too far.
On Thursday, the Chicago Board Options Exchange's Volatility Index closed at its highest level since March 2009. The increase in the VIX, which is known as the market's fear gauge, signals that traders are bracing for more drops in the market.
Even with the drop of 12 percent from its 2010 high, the S&P 500 index is still up 58 percent from the March 2009 bottom and is down 31.5 percent from its record close of 1,565 in October 2007.
Corrections can be scary but they can be good for markets. Analysts say major stock indexes had become overheated in their climb from a 12-year low in March 2009. Corrections also aren't unusual. Drops of 10 percent occur in most years and don't necessarily that stocks will keep sliding.
"We don't think there is any predictability that just because we've had a 10 percent correction now that suddenly we're in for another 10 percent drop," said Bill Urban, principal with Bingham, Osborn & Scarborough, based in San Francisco.
Financial stocks also are drawing attention. The Senate late Thursday approved its version of a financial overhaul bill that contains the biggest regulatory changes for banks since the 1930s. The bill will now be reconciled with a version that passed the House.
The Treasury Department said after the slide in world markets Thursday that Treasury Secretary Timothy Geithner would head to Europe next week to meet with finance officials in Britain and Germany on how to boost confidence in the financial system.
In afternoon trading, Britain's FTSE 100 fell 1.8 percent and dropped below the psychological threshold of 5,000. Germany's DAX index slid 2.7 percent, and France's CAC-40 fell 2 percent. Earlier, Japan's Nikkei stock average fell 2.5 percent.
The problems in Europe overshadowed corporate news. Dell Inc. reported after the closing bell Thursday that its first-quarter net income increased but the company's gross profit margin fell from a year earlier.
Gap Inc. reported a 40 percent increase in first-quarter net income. The company boosted its profit forecast for the year but the outlook fell short of analysts' forecasts.
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