* Dollar dips as investors book profits on its big rally
* Dollar, oil and gold reverse some of big moves
* Euro zone PMIs eyed for clues on economic outlook
By Rika Otsuka
TOKYO, Aug 21 (Reuters) - The dollar edged down on Thursday, slipping from an eight-month high against a basket of currencies as investors booked profits on the U.S. currency's surge this month and oil prices pushed higher.
Persistent worries that a bailout of U.S. mortgage finance giants Fannie Mae <FNM.N> and Freddie Mac <FRE.N> could pose further risks to an already battered financial system also made investors cautious on the dollar.
The dollar has soared this month as investors unwound massive positions favouring the euro, higher-yielding currencies and commodities that they had taken on bets that the global economy would withstand the U.S. downturn and credit crisis.
"The dollar was dented by profit-taking following its recent surge," said a forex trader at a big Japanese bank.
The pace of rise in the U.S. currency is seen slowing as many investors have already slashed their euro holdings, while chart patterns suggested the dollar was due for a brief reversal, traders said. A rebound in oil to above $116 a barrel <CLc1> and a rise in gold <XAU=> also hit the U.S. currency, with market players keeping a close eye on commodities because their tumble added fuel to the dollar's surge.
"Higher oil is not helping the euro and sterling as much as it could. That's an indication that market players remain bearish about those currencies," said Minoru Shioiri, a senior manager of forex trading at Mitsubishi UFJ Securities.
The dollar index, which measures the dollar's value against a basket of six currencies, slipped 0.6 percent to 76.719 <.DXY> and was off an eight-month peak reached on Tuesday.
The euro edged up 0.3 percent to $1.4783 <EUR=>, staying above a six-month low of $1.4630 hit on trading platform EBS on Tuesday. But the European single currency was 8 percent below a record peak of $1.6040 hit a little over a month ago.
The dollar dipped 0.3 percent to 109.48 yen <JPY=>, having retreated from a seven-month high of 110.67 yen hit last week. The euro was little changed at 162.04 yen <EURJPY=R>.
Sterling rose 0.2 percent to $1.8650 <GBP=D4>, up from a two-year trough of $1.8510 struck last week.
The dollar has soared as slowing global growth is expected to lead to interest rate cuts by central banks outside the United States, such as the European Central Bank, the Bank of England and the Reserve Bank of Australia.
But the Federal Reserve is seen as more likely to raise interest rates next year to fight inflation. Data showed on Tuesday that U.S. producer prices jumped in July at the fastest annual rate in 27 years, almost reaching a double-digit pace.
As the market focuses on slowing global growth, investors will look to a string of data from Europe for clues about the health of the euro zone and British economies later in the day.
Reports on euro zone purchasing managers indices for manufacturing and service sectors in August and British retail sales for July are due for release. (Editing by Michael Watson)