* Euro/dollar little changed, concerns about banks weigh
* Euro relinquishes gains made on strong German ZEW
* Risk averse environment continues, stocks suffer
(Releads, adds quotes, update prices)
By Naomi Tajitsu
LONDON, April 21 (Reuters) - The euro was little changed on Tuesday, retreating from a session high against the dollar as a slide in regional shares helped to stub out gains made on a bigger-than-expected improvement in German investor sentiment.
Despite a strong ZEW survey, the pair hovered in range of a one-month low hit on Monday, as investors remain cautious about the global economy given more poor earnings results from U.S. banks.
Bank of New York Mellon Corp <BK.N> on Tuesday said its profits fell by more than half in the first quarter, while State Street Corp said it saw its operating revenue fall 8-12 percent in 2009.
Their earnings reports helped to drive share markets lower, as they added to the view financial institutions are continuing to struggle, and that their recovery will require more time.
Market participants said currencies were being jerked around by moves in other financial markets, which were reacting to earnings reports and economic data that offered mixed signals about the health of the global economy.
Phyllis Papadavid, currency strategist at Standard Chartered in London, said this was helping to keep risk aversion high, which would likely benefit currencies perceived to be safe-haven assets, including the dollar and the yen.
"Equities and macro data are blowing hot and cold at the moment so directionally we think there's upside in the dollar and the yen," she said.
"The signals from equities have been mixed and the forex market has taken that on board. If you take the macroeconomic signals on board as well, you don't have a convincing case that risk-loving trades in FX will make a comeback, at least in the near term."
The euro <EUR=> was unchanged at $1.2920 by 1142 GMT, pulling back from a session high of $1.2988 hit after the ZEW survey. Helping to erase euro gains was a 1.5 percent slide in European shares <
> during a volatile session.Analysts said the single European currency would remain on the back foot, after it hit a 1-month low of $1.2888 on trading platform EBS.
The single currency <EURJPY=R> traded 0.2 percent higher at 126.80 yen, but hovered near 126.10 yen, a 1-month low touched earlier in the day according to electronic trading platform EBS.
The dollar was up 0.2 percent at 98.15 yen <JPY=>, up from a three-week low of 97.66 yen hit on Monday.
STRONG ZEW
The ZEW economic thinktank's monthly poll of German economic sentiment rose to 13.0 from -3.5 in March. It was the first time since July 2007 that the headline index was in positive territory, and beat forecasts for a reading of 1.5.
"Today's ZEW index is good news. However, there is no reason to become overly enthusiastic," said Carsten Brzeski, economist at ING Financial Markets.
"Nevertheless, there are some glimmers of hope...The deterioration of the real economy is slowing down and mixed signals from confidence indicators show that at least confidence is trying to find a bottom."
The euro will likely remain under pressure by uncertainty over what unconventional policy steps the European Central Bank may adopt next month. It is expected to cut interest rates below their current 1.25 percent.
Focus will also remain on banks as players await the outcome of stress tests by U.S. authorities to determine how well lenders would fare if the recession proved deeper and longer than expected. Results are expected on May 4. [
]The Swedish crown rose to around 11.16 per euro from around 11.25 crowns after Sweden's Riksbank cut rates by a smaller-than-expected 50 basis points.
The Riksbank said the repo rate was expected to remain at a low level until the beginning of 2011. It also said there was some probability of further cuts and of resorting to "other measures" should the economy deteriorate more than expected.
The Bank of Canada will also announce its rate decision later in the day, where it is expected to hold interest rates at a historic low of 0.5 percent but unveil a list of other possible steps to stimulate the economy [
]. (Additional reporting by Tamawa Desai, editing by Chris Pizzey)