Broad stock indexes fell sharply in midday trading as concerns grew that the European financial crisis will spread.

Ireland formally asked for help from its neighbors over the weekend after falling into a financial crisis brought on by losses at the three banks the country nationalized. Details of the loan package were still being worked out, but Irish Finance Minister Brian Lenihan has said the rescue would not exceed euro100 billion ($137 billion).

It was the second time that the European Union has come to the rescue of one of the 16 countries that use the euro. In May, the EU and the IMF committed $140 billion to Greece to prevent the country from defaulting on its debt. Euro zone members have been willing to prop up each other's finances in hopes of avoiding a financial crisis that could cause the value of the euro to plummet.

Ireland's request initially pushed stocks higher in Europe. But the Euro Stoxx 50, an index of blue chip companies in countries that use the euro, fell 0.6 percent in afternoon trading there.

The Dow Jones industrial average was down almost 90 points in midday trading.

Ireland's request for assistance does not put an end to the questions facing the euro zone. Fellow members Spain, Portugal and Italy are also saddled with heavy debt burdens and investors fear that they may also need a financial lifeline from other EU members. The euro fell 0.8 percent against the dollar.

"It's been difficult for the European Union to get ahead and stay ahead of the market's concerns, despite the large sums they are clearly willing to dedicate," said Robert Tipp, the chief investment strategist for Prudential Fixed Income. Ireland's announcement that it would seek assistance contributed to stock losses because it was not detailed enough to restore investor confidence, he said.