* Risk appetite rises, boosts euro, some EM currencies
* Euro gains capped by Greece concerns, spreads widen
* Aussie down as RBA surprises and holds rates at 3.75 pct
* Market awaits White House adviser Volcker's testimony (Recasts, updates prices, adds comment, byline)
By Gertrude Chavez-Dreyfuss
NEW YORK, Feb 2 (Reuters) - The U.S. dollar weakened on Tuesday as strong corporate earnings and improving economic data convinced investors to wade temporarily into riskier assets and currencies where returns are higher.
Wall Street shares advanced while commodities gained, helping boost commodity-linked currencies such as the Canadian dollar, Norwegian crown and Brazilian real.
Greece's fiscal woes remained a concern for the market, capping gains in the euro. Greek government bond spreads widened, with investors nervously awaiting the European Commission's verdict due mid-week on the troubled country's budget plans. [
]."The dollar is getting a pause here. But it's not necessarily heading south or resuming a bear trend -- we're just trying to work off an overbought situation" said Carol Hurley, senior market strategist at Lind-Waldock, a futures brokerage firm in Chicago.
"Overall, risk appetite is improving partly because we had good data this morning and that's spilling over to the commodity and stock markets."
Investors tend to sell the safe-haven dollar when the economic outlook improves and risk appetite rises.
Pending sales of previously owned U.S. homes edged up, as expected, in December, adding to the view that the beleaguered sector may be nearing a bottom.
In early afternoon New York trading, the euro <EUR=> rose 0.3 percent to $1.3971, recovering from a seven-month low hit on Monday.
Capping gains in the euro, however, were comments from the Greek finance minister saying that the country's problems were a euro zone issue and that other countries such as Spain and Portugal could follow. [
].The comments came ahead of the publication on Wednesday of EU recommendations to Athens on its austerity plan. The Commission's much-anticipated assessment is likely to be in line with what Greece itself has promised to do in its long-term deficit-cutting plan. [
]The ICE Futures' dollar index, a calculated measure of the dollar's performance against six currencies, slipped 0.3 percent to 78.973 <.DXY>. The dollar was 0.3 percent lower against the yen at 90.33 yen <JPY=>.
The Australian dollar, meanwhile, fell after the Reserve Bank of Australia surprised investors by leaving its benchmark interest rate unchanged at 3.75 percent. There had been almost universal consensus the central bank would raise it to 4 percent. [
]The Aussie dollar <AUD=> fell to a low of US$0.8780 before paring losses to trade at US$0.8855, down 0.7 percent.
Some analysts said a general improvement in risk sentiment, however slight, would limit Aussie losses in the near term, and they expected the currency to remain in demand, particularly given the RBA left the possibility open for future rate hikes.
"Investors may look to use the dip ... as a buying opportunity given that broader 'risk' sentiment appears to be improving and positioning is not stretched," Citi analysts said in a note.
Risk sentiment will be under scrutiny later when White House adviser Paul Volcker appears before the Senate Banking Committee to defend the administration's proposal to limit risk-trading by banks. The proposal spooked investors and triggered a sell-off in equities when it was unveiled last month.
According to testimony obtained by Reuters, Volcker will urge Congress to curb the risks taken by large banks to help prevent them from being treated as "too big to fail".
(Additional reporting by Nick Olivari; Editing by Dan Grebler)