(Updates prices, adds comments, adds byline)
By Kevin Plumberg
NEW YORK, July 24 (Reuters) - The dollar fell to a 15-year low against a basket of major currencies and a record low against the euro on Tuesday, hurt by the potential for credit woes and housing market weakness to weigh on the U.S. economy.
If problems emanating from the deteriorating U.S. subprime market spread to other sectors, foreign demand for U.S. non-government debt, a major source of funding for the trade deficit, could waver and further knock the dollar, analysts said.
"Doubtless the negative news from subprime and contagion to the broad U.S. credit market is bad news to the U.S. dollar," said analysts at Societe Generale.
"The financing of the U.S. trade deficit has become increasingly dependant on foreign purchases of U.S. corporate bonds," they wrote in a note to clients.
The dollar index dropped to a low of 80.016 (.DXY: Quote, Profile, Research), near the psychologically significant level of 80.0. By mid morning it was at 80.07.
The euro jumped to an all-time high of $1.3853, according to electronic platform EBS, before settling back at $1.3835, up 0.2 percent from late Monday.
The dollar sank to a two-month low of 120.42 yen <JPY=>, and sterling climbed to a 26-year high of around $2.0655 <GBP=>.
"Credit markets continue to put pressure on the dollar," said Daniel Katzive, currency analyst with UBS in Stamford, Connecticut.
Weakness in the subprime, or risky, mortgage sector is already spreading to some segments of credit markets, forcing investors to flee to relative safety over the last few weeks by buying top-rated government bonds and selling the dollar for almost all other major currencies.
The latest round of fears about the housing market coincided with sharply lower second quarter profits from building materials maker USG Corp, which said the housing market is in the midst of a multiyear downturn.
The latest lunge lower in the dollar coincided with a report showing Canadian retail sales in May had the biggest increase in nearly a decade, pushing the greenback to a 30-year low against the Canadian dollar of C$1.0367 <CAD=>.
It retraced slightly to C$1.0385 but was ever closer to parity, something markets haven't seen since 1976.
Katzive said the U.S. dollar's broad move lower after the Canadian retail sales numbers supported a view that benchmark U.S. interest rates will remain steady while others rise.
Indeed, the New Zealand dollar <NZD=> rose above US$0.8100 to the highest since being floated in 1982 ahead of a policy meeting on Thursday at which the Reserve Bank of New Zealand is expected to raise what are already the highest interest rates in the industrialized world.
"In general, dollar weakness is still playing positive for many high yields, with the pound and New Zealand dollar stars in the G10 world, exemplifying the historic extremes that currencies can reach," said Alan Ruskin, chief international strategist with RBS Greenwich Capital.
The dollar's decline this week may have only begun, with June U.S. existing home sales due on Wednesday, new home sales on Thursday and the first take on second quarter gross domestic product on Friday.