* Tepid earnings, lower energy shares keep lid on stocks
* Oil price falls on high U.S. inventories
* Euro buoyed by German bond auction; fails to hold gains (Updates U.S. midday trading, New York dateline)
By Al Yoon
NEW YORK, Aug 18 (Reuters) - World stocks struggled to hold a positive trend on Wednesday after tepid earnings reports from some big U.S. companies and energy shares fell as crude oil prices were pressured by a disappointing industry report.
The euro fell, surrendering early gains against the dollar after a German government bond auction attracted solid demand, easing concern about fiscal instability in the European Union.
Oil prices pared losses after a government report showed U.S. crude stocks last week fell less than analysts had expected. That report undercut some of the pressure on prices after the American Petroleum Institute late on Tuesday showed a rise in crude stocks last week.
On Wall Street, shares eased a day after rallying more than 1 percent, as investors grappling with the direction of the economy assessed the latest corporate earnings.
Retailers were again in focus. Discounter Target Corp. reported weak same-store sales but its shares recovered after the company said it sees third-quarter same-store sales rising by 1 to 3 percent.
However, declining energy shares and lackluster earnings kept gains in check. The S&P 500 index was also trading around its 50-day moving average, struggling to break it decisively. The 50-day average is currently around 1,088.
The inability to push through that level with conviction is illustrative of an unenthusiastic market as investors reassess their outlook on the economy, said Kurt Brunner, portfolio manager at Swarthmore Group in Philadelphia, Pennsylvania.
"You don't have the energy to push it through and that might take a little while," Brunner said.
The Dow Jones industrial average <
> fell 10.93 points, or 0.11 percent, to 10,394.92. The Standard & Poor's 500 Index <.SPX> eased 0.42 point to 1,092.12 and the Nasdaq Composite Index < > edged up 6.95 points to 2,216.39.Also on Wednesday, warehouse club operator BJ's Wholesale Club Inc <BJ.N> missed profit expectations, sending its shares down 3.7 percent at $41.70. Target <TGT.N> gained 2.9 percent to $52.17 after earlier losing about 3 percent.
With consumer spending typically accounting for about two-thirds of U.S. economic activity, retailers have come under heavy scrutiny by investors.
The rebound lifted the consumer discretionary sector and helped indexes come off their lows.
In other earnings, Deere & Co <DE.N>, the maker of construction, forestry and agricultural equipment, beat estimates, but said sales were "far below normal levels" and pointed to deteriorating conditions in Europe. Deere lost 2.2 percent to $65.73. [
]Shares of global miner BHP Billiton <BHP.AX><BLT.L> remained in focus, falling more than 3 percent in London on concerns that it may have to overpay for fertilizer group Potash Corp after the Canadian firm rejected an initial offer.
In Europe the pan-European FTSEurofirst 300 <
> closed down 0.4 percent, pressured by energy stocks.U.S. crude for September delivery <CLc1> fell $1.05 to $74.72 a barrel. Crude oil is down around 4 percent this month.
World shares as measured by MSCI <.MIWD00000PUS> and Thomson Reuters <.TRXFLDGLPU> eked out gains of 0.1 percent. Japan's Nikkei <
> closed up about 0.9 percent.Traders warned against reading too much into market moves at the moment given that it is high summer in the northern hemisphere and there are major questions about the direction of the world economy.
"The market is still rangebound. There is no conviction at the moment, and this will go on until September when investors come back from holiday," said Alexandre Le Drogoff, technical analyst at Aurel BGC in Paris.
The dollar endured selling pressure against the yen, easing toward recent 15-year lows on growing speculation that Japanese authorities are unlikely to intervene to counter their currency's recent strong run.
The euro recovered from the day's low after a 5 billion euro sale of German 10-year debt produced a record-low average yield of 2.37 percent, but failed to hold above the key level of $1.2900.
The euro declined 0.09 percent at $1.2868 <EUR=>.
"There is currently not enough fundamentally positive news out of Europe to drive the euro beyond 1.2900 on a sustained basis," said Joseph Trevisani, chief analyst at FX Solutions in Saddle River, New Jersey.
Sterling rose after the the release of minutes from the Bank of England's policy meeting earlier this week showed officials were less dovish than expected.
The dollar shed 0.23 percent against the yen to 85.33 yen <JPY=>, not far from a 15-year low of 84.72 yen hit on trading platform EBS last week.
U.S. Treasury bond prices gained as the decline in equities refreshed concerns about economic strength.
The 30-year bond surged more than a point in price to yield 3.70 percent, down from 3.77 percent at Tuesday's close and a fresh 16-month low. Longer-dated German bonds rallied after Berlin drew strong demand at a 5 billion euro sale of new 10-year paper at a record low average yield.
Gold <XAU=> rose $8.90, or 0.73 percent, to $1,231.80. (Additional reporting by Blaise Robinson and Anirban Nag in London, and Edward Krudy, Leah Schnurr and Nick Olivari in New York, and Brad Dorfman in Chicago; Editing by Leslie Adler)