* Dollar gets modest bid as investors balance portfolios
* Dismal housing, growth data weigh on US economic outlook
* U.S. firms forced to reduce costs; GM, Ford ratings cut
* Trading desks thin out as holidays approach
(Recasts, adds U.S. data, adds comment)
By Steven C. Johnson
NEW YORK, Dec 23 (Reuters) - The dollar edged up against most major currencies in thin pre-holiday trade on Tuesday as year-end demand for the greenback blunted another round of grim economic data that suggested a prolonged U.S. recession ahead.
Analysts said investors who needed to close the books on 2008 were buying back dollars to rebalance their portfolios, lending the U.S. currency modest support in midday trade.
But those taking the longer view said the prospects for the U.S. economy and currency remain worrisome, particularly after data on Tuesday confirmed the economy shrank 0.5 percent in the third quarter while home sales continued to decline.
"It's the last full trading day of the year, so there's excess dollar demand for rebalancing," said Brian Dolan, chief currency strategist at Forex.com in Bedminster, New Jersey.
"But the data are still very grim and after seeing the third-quarter GDP, the market is prepared to see the economy contract by 4 or even 5 percent in the fourth quarter."
Around midday in New York, the dollar was changing hands at 90.56 yen <JPY=>, up 0.5 percent on the day but not far from last week's 13-1/2-year low near 87 yen.
The euro rose 0.6 percent to 126.37 yen <EURJPY=> and 0.1 percent to $1.3955 <EUR=>, well off a $1.4020 session high.
Sterling fell 0.6 percent to $1.4739 <GBP=>, hit by data showing the UK economy contracted 0.6 percent between July and September. The euro rose 0.9 percent to 94.79 pence <EURGBP=>, setting up a possible move to parity over the coming weeks.
The dollar fell 0.7 percent to 1.0850 Swiss francs <CHF=> but rose sharply against the Australian <AUD=> and New Zealand <NZD=> dollars.
Sharp declines in the number of U.S. existing and new homes sold in November bolstered the grim outlook for the U.S. economy.[
].Also causing concern was news that big U.S. manufacturers were slashing costs. Caterpillar Inc said it would cut white-collar pay by up to 50 percent and Textron Inc announced 2,200 job cuts worldwide [
].Concerns over the prospects for U.S. automakers also mounted as ratings agency Standard & Poor's cut its unsecured debt rating on General Motors <GM.N> to 'C' [
] and Moody's lowered ratings on Ford <F.N> to 'Caa3' [ ]."We have had a litany of bad news on the U.S. economy over the past 24 hours and this continued negative news will weigh on the dollar," Bank of New York-Mellon head of currency research Simon Derrick said.
The economic outlook for the 15 countries that use the euro also remained bleak, with the currency market expecting the European Central Bank to cut benchmark interest rates in January from their current 2.5 percent.
A worsening U.S. economy prompted the Federal Reserve to slash interest rates to near zero last week, erasing what was left of the dollar's yield appeal.
The Bank of Japan followed suit in Japan, while markets expect the Bank of England to cut rates aggressively in early 2009 as well, particularly after Tuesday's growth data.
(Additional reporting by Naomi Tajitsu in London; Editing by Chizu Nomiyama)