* Euro up as global rescue plans boost risk appetite
* U.S. to inject $250 billion into banks, calming nerves
* Dollar down but off lows as economic anxiety persists
* Trichet speech awaited for clues on interest rates (Updates prices, adds detail, adds comment)
By Steven C. Johnson
NEW YORK, Oct 14 (Reuters) - The euro rose on Tuesday as investors bet European and U.S. government plans to pour cash into troubled banks would help markets start climbing out of the worst financial crisis since the 1930s.
Worries about the fallout from the credit crisis on the world economy, however, knocked the euro off an earlier one-week high, while the dollar pared earlier losses against a basket of currencies <.DXY>.
The United States said on Tuesday it would pump $250 billion into banks, including the country's nine largest, following similar plans in Britain, France and Germany. [
]That encouraged risk appetite, boosting U.S. stocks and the euro and hastening selling of the low-yielding yen. It also loosened credit, with the interbank cost of borrowing dollars for three months declining the most since March, according to the British Bankers Association.
"This is what traders wanted to see -- bank balance sheets being shored up -- and the best way to do it is with a direct capital infusion. It's immediate and it should help lending conditions ease," said Greg Salvaggio, vice president of trading at Tempus Consulting in Washington.
"There's still anxiety out there, though, so we'll have to see if this move gets traction," he said, adding the world still faces a "significant recession."
Late morning in New York, the euro was changing hands at $1.3660 <EUR=>, up 0.5 percent from Monday but off a session peak of $1.3769. Against the yen, it was up 0.7 percent at 139.59, below 141.72, its high on the day. Last week, it hit a three-year low at 132.25, according to Reuters data.
Against the yen, the dollar rose 0.2 percent to $102.20 <JPY=>, while sterling rose 0.6 percent to $1.7491 <GBP=>
The greenback rallied broadly last week as stock markets swooned and investors pulled out of risky trades for the relative safety of the dollar, a trend that has been interrupted so far this week.
Late morning, the dollar was 0.4 percent weaker against a basket of major currencies <.DXY> after earlier falling 1 percent. Instead, investors poured into higher-yield currencies such as the Australian dollar <AUD=>, which rose 1.2 percent to $0.7067, off a session peak above $0.72.
"We've seen a very strong relief rally after severe falls on global stock markets, but to say that everything is over and it's going to be hunky-dory from now on is premature," said Niels Christensen, currency strategist at Nordea in Copenhagen.
A dose of reality came with data from Germany's ZEW research institute showing a bigger-than-expected slide in investor sentiment in October, suggesting the euro zone's top economy may be in for a prolonged slump. [
]To that end, investors said they would be paying close attention to a speech by European Central Bank President Jean-Claude Trichet scheduled for 12:15 p.m. (1615 GMT) for any hints of further euro-zone interest rate cuts.
The ECB cut rates by 50 basis points in concert with other central banks last week, and markets expect more cuts by year end. (Additional reporting by Veronica Brown in London; editing by Leslie Adler)