* Dollar up for third day, helped by strong dollar pledge
* World stocks, crude prices dip
By Dominic Lau
LONDON, Oct 19 (Reuters) - The dollar rose for a third straight day on Tuesday as traders took profits on gains in other currencies after U.S. Treasury Secretary Timothy Geithner spoke in favour of a strong dollar, while world stocks dipped. The rebounding greenback helped keep a check on commodity prices, with gold <XAU=> holding steady and oil <CLc1> slightly softer, though copper prices <MCU3> hit their highest level since July 2008 on falling inventories and strong demand prospects. Commodity prices and emerging market assets have been buoyed by expectations of another round of money-printing by the U.S. Federal Reserve to stimulate a flagging recovery as investors searched for higher yields, while the dollar has come under pressure against other currencies.
"Having priced in quantitative easing, markets are wondering about whether they have over-anticipated the extent of it," said Bernard McAlinde, investment strategist at NCB Stockbrokers in Dublin.
"If the only thing that is tempering the market's expectation of the amount of quantitative easing is better than expected economic data then that's still good news."
Currencies like the euro and the Australian dollar that had broken higher ground against the greenback are now giving up some of those gains.
The dollar <.DXY> rose 0.6 percent against a basket of major currencies after hitting a 10-month trough on Friday. The euro <EUR=> dipped 0.2 percent to $1.3911.
Geithner's remark that the United States would not engage in dollar devaluation and needed to work hard to preserve confidence in a strong dollar also offered support. [
]"Comments from Geithner and a reversal in short dollar positions is pushing it higher," said Gareth Barry, currency strategist at UBS in Singapore. "But this will not last too long with many waiting to see what the Fed will do next month."
The market is looking for further clues on the size of the quantitative easing, and will scrutinise any comments from Fed Chairman Ben Bernanke and other U.S. central bank officials later in the day.
MORE U.S. BANK RESULTS
Futures on the tech-heavy U.S. Nasdaq Composite <NDc1> lost 1 percent, indicating a weaker opening, after Apple <AAPL.O> reported weaker-than-expected gross margins and iPad shipments disappointed investors.
Futures for the S&P 500 <SPc1> and the Dow Jones <DJc1> fell 0.1 and 0.3 percent, respectively, ahead of results from Goldman Sachs <GS.N> and Bank of America <BAC.N>. Citigroup <C.N> and JPMorgan <JPM.N> have so far posted better-than-expected quarterly results for the U.S. banking sector.
Japan's Nikkei <
> put on 0.4 percent, while Europe's FTSEurofirst 300 < > rose 0.1 percent, helped by a healthy outlook for consumer spending in Germany. [ ]Yields on benchmark 10-year German Bunds <DE10YT=RR> rose 3 basis points to 2.42 percent on the back of the above-forecast German ZEW sentiment survey.
World stocks measured by MSCI All-Country World Index <.MIWD00000PUS> fell 0.2 percent and the Thomson Reuters global equity index <.TRXFLDGLPU> dropped 0.9 percent, while the MSCI emerging market benchmark <.MSCIEF> slipped 0.3 percent.
Emerging market shares have gained more than 12 percent this year, outpacing a 6-percent rise in global equities.
Credit Suisse private bank said in a note that emerging market equities should be supported by further quantitative easing in the United States.
The World Bank, however, warned that rising capital flows to East Asia are fanning fears of asset bubbles and authorities need to be careful not to repeat the mistakes of the Asian financial crisis more than a decade ago. [
](Additional reporting by Anirban Nag, Harpreet Bhal and William James in London; Editing by John Stonestreet)