(Recasts with latest price moves, adds Wall Street outlook)
By Natsuko Waki
LONDON, May 27 (Reuters) - World stocks erased early gains and hit a two-week low on Tuesday after concerns resurfaced over the health of banks, while data showing deteriorating consumer and business morale in many parts of Europe weighed on the euro.
A broadly stronger dollar failed to tame oil prices which rose above $133 a barrel -- close to last week's all-time highs, while gold slipped.
Data from the European Central Bank on its overnight loan facility showed a bank or banks borrowed 538 million euros from it on Monday, which, on the margins, rekindled some fears about the banking sector hit by the credit crisis.
However, analysts and traders played down the figures, pointing out that Monday was a UK and U.S. market holiday with consequent low liquidity and the sum involved has been borrowed several times this year already.
European banks <.SX7P> hit a fresh two-month low, dragging broader indexes lower. This followed concerns about more asset writedowns at Swiss bank UBS <UBSN.VX> whose shares have been falling sharply since Monday.
"There is the rumour of further writedowns in the banking sector... The market is reacting very nervously," a trader said.
The FTSEurofirst 300 index <
> fell 0.6 percent, while MSCI main world equity index <.MIWD00000PUS> shed 0.1 percent.U.S. stock futures <SPc1> were pointing to a weaker start on Wall Street later, which opens after a long weekend.
DETERIORATING MORALE
A survey by GfK showed German consumer morale is set to deteriorate unexpectedly next month, dampened by concerns about inflation and uncertainty over financial market turmoil.
French business confidence fell to its lowest level in 2-1/2 years in May, while consumer morale in Sweden, Finland and Iceland also fell this month. Italy was an exception, where business morale rose in May after six consecutive declines.
After the data the euro retreated to $1.5728 <EUR=>, down 0.3 percent on the day, from a one-month high hit earlier.
"Markets have started to wake up to the possibility that Europe is slowing down," said Ian Stannard, senior foreign exchange strategist at BNP Paribas. "Today's data is consistent with that view."
Emerging sovereign spreads <11EMJ> were steady while emerging stocks <.MSCIEF> rose 0.2 percent.
The June Bund future <FGBLM8> rose 4 ticks, drawing safe-haven flows, while euro zone government bond yields and implied yields slipped after ECB data.
The dollar rose 0.2 percent against a basket of six major currencies <.DXY>.
News of another attack on Nigerian oil facilities has been fuelling concerns about immediate supplies, pushing U.S. light crude <CLc1> up one percent to $133.39 a barrel -- close to record highs just above $135 set last week.
Gold <XAU=> fell to $923.30 an ounce as the dollar rose. (Additional reporting by Naomi Tajitsu)