* US dollar slips on Fed, solid 10-yr Treasury debt auction
* Fed's Bernanke signals no change to stimulus program
* Euro on upward trajectory on charts
(Recasts, updates prices, adds comments, changes byline)
By Julie Haviv
NEW YORK, Feb 9 (Reuters) - The U.S. dollar fell against the euro on Wednesday, after a strong Treasury debt sale accelerated bearish sentiment in the wake of comments by Federal Reserve chairman Ben Bernanke that its bond buying program would continue.
The dollar fell to a 3-day low versus the euro but was steady against the Japanese yen as U.S. bond yields fell after an auction of $24 billion 10-year Treasury notes drew strong demand.
The euro rose as high as $1.3745 <EUR=EBS> on trading platform EBS, breaking above resistance around $1.3740, the 61.8 percent Fibonacci retracement of its fall from November to January. It last traded at $1.3724, up 0.7 percent. The next upside target is around $1.3765, the euro's low on Feb. 2.
Most of G10 currencies have been range-bound this year and short-dated implied volatility has fallen sharply, with notable drops including USD/CAD 3-month volatility which is now at levels seen before the 2008 financial crisis according to Deutsche Bank.
Foreign exchange volatility is most strongly associated with the level of the U.S. unemployment rate, the bank said, so last week's sizable drop in the jobless rate is consistent with lower volatility, but with long-term macro-economic risks still abundant, long-dated volatility still looks set to lag rather than lead short-dates.
The euro earlier broke above the $1.3700 level versus the dollar, triggering stop orders in the wake of Bernanke's testimony to the U.S. House of Representatives Budget Committee that largely echoed a speech he delivered last week.
Bernanke said U.S. unemployment remained too high, suggesting the Fed would push on with its $600 billion stimulus program. The Fed's program, first announced last November, is tantamount to printing money, essentially diluting the value of the dollar.
Some analysts hoped that given more signs of a U.S. economic recovery, Bernanke would drop hints that the Fed would end its bond-buying program sooner than expected. Instead he repeated concerns about high unemployment, ensuring the Fed's quantitative easing will remain in place and fueling dollar selling. For details, see [
]"Bernanke is telling you that the Fed is not going to rush to raise rates, and that's why the dollar sold off," said David Woo, head of global rates and currencies research at Bank of America Merrill Lynch in New York.
"To some extent, he's also pouring cold (water) on the bond market selloff in the last week or so. So the dollar selloff is in sync with the rally in Treasuries."
The euro had been rising throughout the session, with traders citing talk of buying by central banks in Russia and South Korea.
The dollar also hit a session low of 82.20 yen on EBS immediately following the Treasury debt auction, but soon turned slightly positive and was last at 82.37 yen <JPY=EBS>, up 0.1 percent on the day.
Hedge funds were said to be buyers of the currency pair overnight, with traders citing stop orders above 82.70 yen.
U.S. Treasury yields have moved higher across the curve in the past week amid further signs of a U.S. recovery. Two-year yields have risen about 30 basis points in the last week.
A break through 82.95 yen, the initial trendline resistance, will trigger a bullish signal on dollar/yen and open upside toward 85 yen, BNP Paribas said in a note.
More gains for the dollar are seen in the near term against the yen, analysts said, especially since the currency pair has lagged the increase in Treasury yields. At current two-year yields, analysts said the dollar should be trading between 88 to 89 yen.
Further weighing on the yen was a Moody's warning that a lack of success on fiscal reform would negatively affect Japan's credit rating. [
]The dollar fell 0.6 percent against the Swiss franc <CHF=> to 0.9570 francs and was also down 0.2 percent against sterling at $1.6105 <GBP=>.
The ICE Futures' dollar index, measured against six major currencies, lost 0.5 percent to 77.598 <.DXY>.
(Additional reporting by Gertrude Chavez-Dreyfuss)