The dollar's best monthly performance since November may provefleeting as a slowing U.S. economy and falling short-term interestrates encourage investors to use the currency to fund investmentsin higher-yielding assets.

The U.S. currency's value will be unchanged from current levelsby year-end, down from last month's predicted 2 percentappreciation, according to analyst forecasts compiled by Bloomberg.Bets remain tilted against the greenback even after last month's2.3 percent gain in IntercontinentalExchange Inc.'s Dollar Index,Commodity Futures Trading Commission data show.

While the dollar gained against 14 of the 16 most-tradedcurrencies in May, it fell last week after weaker-than-forecastreports on manufacturing, employment and consumer confidence ledtraders to raise bets that the Federal Reserve will keep rates nearzero. Traders also found less reason to seek shelter in thecurrency as European officials agreed to provide more financial aidto Greece and German Chancellor Angela Merkel said the EuropeanUnion is committed to keeping the euro intact.