NEW YORK -- A rally pushed the Dow Jones industrials back over 10,000 after the stock market sank to its lowest level of the year Tuesday.
But the late-day rebound did nothing to erase lingering worries about Europe's debt crisis.
The Dow plunged more than 250 points after the opening bell and stayed under 10,000 most of the day, then charged back to finish slightly down when signals from Washington suggested that banks would not be forced to sell their lucrative derivatives units as part of financial reform.
The Standard & Poor's 500 index even managed a slight gain.
Still, investors are concerned about European debt, and that's likely to mean more turbulent days like Tuesday. The market worries that even austerity measures by governments there will not be enough to fix the problem and fight off a prolonged economic slump in Europe, or even another global recession.
"It seems like the Europeans are playing 'tag, you're it.' First it was Greece and now it's maybe Spain or Portugal," said Jonathan Corpina, a New York Stock Exchange floor trader and president of Meridian Equity Partners.
"We know someone else is next. The problem is that it seems like every plan in place isn't going to satisfy the needs," he said.
Britain's Queen Elizabeth opened Parliament with a warning of hard times, saying in a speech on behalf of Britain's new government that there would be budget cuts because "the first priority is to reduce the deficit and restore economic growth."
Other European countries are imposing budget cuts as well, trying to control their debt. Investors are concerned that these steps will stifle economic growth, and that the growth of other countries, including the United States, inevitably will be stunted.
Besides the financial crisis in Europe, investors were reminded that political issues, such as tension between North and South Korea, can threaten economic growth. Analysts said the unresolved Gulf of Mexico oil spill also contributed to the foul mood.
It was enough to send stocks into a deep dive after the opening bell. In just the first half-hour of trading the Dow sank to 9,774.48, its lowest reading of the year.
For much of the day the Dow threatened to set a closing low for the year. The average is down more than 10 percent in just the past month.
But bank stocks surged, and the rest of the market followed, after Rep. Barney Frank, chairman of the House Financial Services Committee, suggested that financial companies should not have to spin off their derivatives businesses, as a Senate provision would have them do.
Frank, D-Mass., said he believes banks should be able to use the complex financial instruments to hedge their own risks. Bank regulators and Obama administration officials also oppose the Senate provision, which was inserted by Sen. Blanche Lincoln, D-Ark.
The Dow has closed below 10,000 only once this year, in early February. Since then it has traded below 10,000 seven times but each time managed to push above that psychological barrier by the close.
Investors also fled from the euro and commodities including oil, and again sought safety in government bonds. That drove interest rates lower. The benchmark 10-year note's yield fell to its lowest level since April 2009.
The market's continuing slide, with frequent triple-digit drops in the Dow, recalls the unrelenting selling of the 2008 financial crash, and begs the question of what can halt the plunge.
Jim Dunigan, managing executive of investments for PNC Wealth Management, said good news about jobs or corporate earnings could stabilize stocks by signaling that a U.S. recovery is intact.
The government's monthly jobs report in less than two weeks is expected to show that employers are ramping up hiring further. And companies will soon start giving hints about profits for the quarter that ends in June.
"You could derail growth in Europe and not derail growth in the United States, but people don't necessary use a lot of logic when they're headed to the exits," Dunigan said.
For now, traders are unswayed by upbeat U.S. economic news. They ignored a better-than-expected report Tuesday showing consumer confidence index rose for the third straight month.
Investors are ignoring current signs of growth and trying to gauge what shape the global economy will be in later this year.
"Market participants feel like they're walking on eggshells," said Oliver Pursche, executive vice president at Gary Goldberg Financial Services in Suffern, N.Y. "Every small piece of potentially bad news is being exaggerated and mentally being fast-forwarded to the worst-case scenario."
The markets also were hurt by reports that North Korean leader Kim Jong Il had ordered his military to combat alert because of rising tensions on the Korean peninsula.
North Korea also said it would cease communication and relations with Seoul. South Korea has said North Korea was responsible for the sinking of a South Korean warship two months ago. Major indexes in Japan and Hong Kong fell more than 3 percent.
Meanwhile, the monthlong effort to cap the BP oil well that has spewed millions of gallons of oil into the Gulf of Mexico is rattling investors also, Corpina said. Oil is coming ashore across a 150-mile swath of the Gulf Coast, endangering wildlife and livelihoods in commercial fishing and tourism.
"The worry is that the situation is getting worse and there's no real fix," he said. "First we were just talking about the oil industry being affected. Now it's the environment and fishing industries. Next we'll be talking about the hotel and leisure industries."