* Dollar hits 9-month high vs yen of 114.53 yen
* Dollar set to post biggest gain vs yen in over 21 years
* Oil producers agree to curb oil output for first time since 2008
* Dollar hits roughly 10-month high vs Swiss franc
* Treasury yields rise on surge in oil prices
* Euro set to post biggest monthly drop vs dollar in a year
By Sam Forgione
NEW YORK, Nov 30 (Reuters) - The U.S. dollar hit its highest level against the yen in 9 months on Wednesday and also surged against the euro and Swiss franc after a rally in oil prices pushed U.S. Treasury yields higher, while strong private payrolls data bolstered expectations for a hawkish Federal Reserve next year.
The dollar rose as much as 1.9 percent against the yen to 114.53 yen, its highest level since March 2, while the euro fell nearly 0.9 percent against the dollar to a session low of $1.0554. U.S. crude prices rallied more than 10 percent as some of the world's largest oil producers agreed to curb oil output for the first time since 2008.
The dollar was last on track to gain nearly 9 percent against the yen in November to mark its strongest monthly performance since August 1995. The dollar also hit a roughly 10-month high against the Swiss franc of 1.0204 francs.
The gains in oil prices boosted views of higher inflation, which in turn sent U.S. Treasury yields higher given the negative impact of inflation on bond prices. The higher Treasury yields fueled demand for the dollar relative to currencies such as the euro and yen, whose government bond yields are still low-to-negative.
"It's the widening of interest rate differentials," said Alvise Marino, FX strategist at Credit Suisse in New York. Benchmark 10-year U.S. Treasury note yields rose as much as 11 basis points to 2.41 percent.
A continuation of strong U.S. economic data after a stronger-than-expected gross domestic product growth reading on Tuesday also supported the dollar by underpinning expectations that the Fed would raise interest rates next month and continue to hike at a swift pace next year, analysts said.
ADP National Employment Report data on showed U.S. private employers added 216,000 jobs in November, well above economists' expectations. The ADP figures precede the U.S. Labor Department's more comprehensive nonfarm payrolls report on Friday.
"It absolutely blasted expectations, and when you see that happen, that should promote some dollar strength," said Stephen Casey, senior foreign exchange trader at Cambridge Global Payments in New York.
The dollar index, which measures the greenback against a basket of six major currencies, was last up 0.5 percent at 101.470.
The index was set to gain about 3.1 percent for the month, while the euro was set to post its biggest monthly decline against the dollar in a year, of 3.5 percent.
Reporting by Sam Forgione; Editing by Jonathan Oatis and Grant McCool