* Euro/dlr lifted by ZEW data, but retreats from day's high
* German ZEW indicator rises more than forecast to 56.1
* Riskier FX gain vs dollar, yen as stocks, oil rise
(Updates prices, adds quotes)
By Naomi Tajitsu
LONDON, Aug 18 (Reuters) - The euro rose against the dollar and the yen on Tuesday, recovering from two-week lows after a surprisingly strong poll of German investor sentiment raised some optimism about the euro zone economy.
A recovery in European share prices from steep losses the previous day also helped to boost currencies considered to be higher risk which had suffered on Monday. As a result, the dollar and the yen fell across the board.
The euro hit the day's high against the dollar of $1.4155 after the ZEW economic research institute's economic sentiment index rose to 56.1 in August from 39.5 in July, its highest level since April 2006 and beating forecasts for 45.0. [
]By 1134 GMT, the pair had retreated to $1.4096, little changed on the day but above $1.4045 hit on Monday, its lowest since late July.
Some analysts said the poll suggested the German economy would continue to grow this year after data last week showed an unexpected rise in gross domestic product in the second quarter.
But others said the survey, which ended its polling period after the GDP data, may have been too optimistic and added the German economy continues to face major hurdles before any recovery, a view which was helping to cap euro gains.
"Given the extent of the ZEW surprise, the impact on euro/dollar has been disappointing," said Hans-Guenter Redeker, chief currency strategist at BNP Paribas in London, adding that gains in the pair were capped at $1.4155 where technical resistance lay.
He added tight credit conditions in Germany would continue next year, raising the possibility the government may have to come up with more measures to help the economy.
"This are not as rosy as suggested by the ZEW," he said.
RISK SENTIMENT BOOSTED
Against the yen, the euro rose 0.8 percent to 134.05 yen <EURJPY=R>, having hit a session high of 134.81 yen on EBS, way above Monday's low of 132.51 yen.
A 1 percent rise in European shares <
>, accompanied by a 0.5 percent gain in U.S. S&P 500 stock futures <SPc1> and a recovery in oil prices <CLc1> helped lift investor sentiment.This lent support to the euro and perceived higher risk currencies such as the Australian dollar, which recovered from sharp falls against the U.S. dollar and the yen on Monday, while higher-than-forecast inflation data lifted sterling.
The high-yielding Australian and New Zealand dollars each rose roughly half a percent against their U.S. counterpart. They gained more than a full percent against the yen as the Japanese currency fell across the board.
The dollar rose 0.5 percent to 95.00 yen <JPY=>, while the dollar index dipped 0.1 percent to 79.199 <.DXY>.
Analysts noted, however, that investors were yet to be convinced the recent downward move in equities is over.
"The market is waiting to see whether the positive tone in equities can last into the U.S. session," said Michael Klawitter, senior currency strategist at Dresdner Kleinwort in Frankfurt.
Traders awaited readings of U.S. housing starts and producer prices due at 1230 GMT to see whether the housing market is improving after severe weakness, and if inflation is rising at the wholesale level. (Additional reporting by Jessica Mortimer, editing by Chris Pizzey)