* Euro under broad selling pressure, Greece jitters remain
* China tightens policy, high-risk currencies tumble
* EU pledge to help Greece short on details, analysts say (Adds comments, U.S. data, updates prices, changes byline, dateline; previous LONDON)
By Gertrude Chavez-Dreyfuss
NEW YORK, Feb 12 (Reuters) - The euro plunged to a nearly nine-month low against the dollar on Friday after a rescue deal for debt-stricken Greece left many details unanswered, while China's surprise monetary tightening hit higher-yielding currencies.
The Chinese central bank's move to raise commercial banks' reserve requirements hurt risk-taking on the view it may choke economic recovery. [
] The move pushed the dollar index to a seven-month high and pressured the Australian dollar across the board.In the euro zone, the European Union on Thursday offered its support to help Athens rein in its deficits, but a lack of detail on its pledge kept investors jittery. That resulted in widening yield spreads between benchmark government bonds in Greece and Germany -- widely considered the safest in the euro zone.
"The Greece situation is still weighing on the euro. Markets were hoping for large answers on the Greece rescue plan, and they didn't get that," said Camilla Sutton, senior currency strategist at Scotia Capital in Toronto.
She also said that the China's move to increase reserve requirements "has dampened risk appetite" and resulted in safe-haven flows in the U.S. dollar.
In early New York trading, the euro <EUR=> fell 0.8 percent to $1.3591, after dropping to $1.3533, its weakest since May 2009, according to Reuters data.
The euro's losses pushed the dollar to 80.748 against a currency basket, its highest since July 2009. The ICE Futures' dollar index <.DXY> was last at 80.478, up 0.6 percent on the day.
Concern over how Athens would service its debt had hammered the euro -- it has fallen nearly 10 percent since late 2009 -- and analysts said China's surprise announcement only aggravated selling in higher risk currencies.
The next steps in the Greece crisis are meetings early next week of EU finance ministers, although analysts said that might still be too early to expect much clarity on what the bloc will do to help Athens tackle its debt. [
]"It's very difficult to see a silver lining for the euro at the moment as it's very difficult to see a solution for Greece," said Jane Foley, currency research director at Forex.com in London.
"And certainly, with China slowing, too, it just enhances the safe-haven behavior toward the dollar."
The single European currency also struck a decade low against the Australian dollar <EURAUD=R> at A$1.5275.
Adding to the pain were figures on Friday showing the euro zone's gross domestic product rose only 0.1 percent in the fourth quarter, suggesting its economic recovery has lost steam as growth in Germany, the euro zone's largest economy, stalled in October, November and December. [
]The Australian dollar <AUD=> fell 1.0 percent against the U.S. dollar to US$0.8823.
The U.S. dollar rose 0.8 percent against the yen to 90.35 <JPY=>, extending gains after stronger-than-expected U.S. retail sales data. [
]. (Additional reporting by Naomi Tajitsu in London; Editing by Padraic Cassidy) (gertrude.chavez@thomsonreuters.com; +1 646 223 6322; Reuters Messaging: gertrude.chavez.reuters.com@reuters.net))