(Recasts, updates prices, changes byline)
By Lucia Mutikani
NEW YORK, March 25 (Reuters) - The dollar fell broadly on Tuesday, posting its steepest loss against the euro in two weeks, sparking a rebound in commodity prices and helping to preserve investors' appetite for risk.
News that U.S. consumer confidence in March plunged to a five-year low, while expectations for the future dropped to their lowest level in 34 years also added to selling pressure on the dollar. A separate report showed U.S. home prices for January declined in 16 of the 20 regions measured.
However, caution ahead of Germany's Ifo business sentiment survey for March due on Wednesday curbed the euro's rise against the dollar, analysts said.
"Even though the numbers were so bad, what we are seeing is part of the equity/dollar risk appetite play all of which is suggesting a comfort to take on risk at the expense of the U.S.dollar," said Ashraf Laidi, chief FX strategist at CMC Markets in New York.
The euro climbed to a session peak $1.5618 <EUR=>. In late New York trade, it was up 1.2 percent on the day at $1.5609, posting its biggest one-day rise since March 12, according to Reuters data.
The single currency is down about 1.9 percent from last week's record high at $1.5904, but still up almost 7.0 percent since the beginning of the year.
"The euro's gains against the dollar were limited considering the extent of the poor showing in consumer sentiment and that could partially reflect cautiousness ahead of the Ifo survey tomorrow," said Laidi.
"After a string of monthly increases the Ifo may finally show a retreat that would risk sending the euro back in selling mode as was the case last week. The Ifo has been instrumental in key turn arounds in the euro."
A Reuters survey forecast the Ifo business climate index slipping to 103.4 from 104.1 in February.
U.S. ECONOMIC WORRIES LIFT YEN
Concerns about the health of the U.S. economy and the global financial sector, which were heightened by the downbeat consumer confidence and housing report, pushed the dollar weaker versus the low yielding Japanese yen and Swiss franc.
Low yielding currencies such as the yen and Swiss franc tend to attract flows during periods of uncertainty as the low interest rates reflect the capital surplus of their respective countries.
The interbank cost of borrowing three-month dollar, sterling and euro funds rose on Tuesday, suggesting financial institutions were still hoarding cash despite efforts by central banks to inject liquidity into the money market.
"While the Fed is doing their job ensuring there is plenty of liquidity in the system...there is still a big question mark about the extent of the slow down in the U.S. economy," said Paresh Upadhyaya, portfolio manager at Putnam Investment Management in Boston.
Against the yen, the dollar slid to an intraday trough of 99.640 yen <JPY=> and erased earlier gains above 101 yen. It was last trading at 100.20 yen, down 0.5 percent. Against the Swiss franc, the dollar fell 1.00 percent to 1.0079 francs <CHF=>.
The weak dollar saw gold and oil prices rebound from last week's declines, supporting U.S. equities and lifting commodity-based currencies such as Australian and New Zealand dollars.
"Risk aversion has subsided from last week and people are more willing to get back into the things that have worked so well for so long. You are seeing the old trends reset themselves," said Adam Fazio, senior currency strategist at CIBC World Markets in New York.
(Additional reporting by Gertrude Chavez-Dreyfuss; Editing by Diane Craft)