* Solid demand at Spain auction lifts euro; gains capped
* ECB in focus; traders await comments from Trichet
* Options keep euro within $1.20-$1.21 range
By Naomi Tajitsu
LONDON, June 10 (Reuters) - The euro rose on Thursday as strong demand at a Spanish bond auction eased concerns about how Spain will fund its large debt, while investors awaited a European Central Bank news conference.
Peripheral euro zone government bond yield spreads over German benchmarks narrowed after Madrid's auction of three-year bonds, prodding the euro higher. Widening spreads in recent days have weighed on the single currency. [
]Traders said market participants were wary of taking on significant long euro positions, with option expiries at $1.20 and $1.21 later in the day also helping to confine the single currency within a $1.20-$1.21 range.
Investors are looking for ECB President Jean-Claude Trichet to explain the central bank's government bond-buying programme when at a 1230 GMT news conference. The ECB earlier held interest rates at a record low 1.0 percent.
"Trichet is likely to emphasise that peripheral bond purchases are all about providing liquidity in dysfunctional markets, rather than quantitative easing," said Adam Cole, global head of currency strategy at RBC.
He added that assurances the plan would be reversed as soon as liquidity improves may further support the euro, given that a build-up in short positions in the single currency had increased the need for investors to trim those positions.
Investors will also look for hints to whether the ECB will offer extra funds to banks to ease strains from the euro zone debt crisis. [
]At 1146 GMT, the euro was up roughly half a percent on the day against the dollar <EUR=> at $1.2040, treading above $1.1876 hit on Monday for the first time in more than four years.
Traders said investors were selling on rallies towards $1.21, but a break above $1.21 could see the euro extend gains.
Analysts said solid demand at the Spanish auction had cemented support for the euro. The amount of bonds sold came in at the top of the expected range, even though they were sold at a premium above a similar issue in April.
"(The auction) adds to the story that the euro may be due a bit of a bounce as it has come a long way down in a relatively short space of time," said Gavin Friend, currency strategist at nabCapital.
TECHNICAL RESISTANCE
But technical analysts said the euro's downward trend would remain intact barring a move above $1.2135, the 50 percent retracement of the 2000-2008 euro rally.
Debt problems in several euro zone countries, coupled with worry about the euro's future, have caused the currency to fall around 16 percent against the dollar this year.
Against the yen, the euro rose 0.3 percent to 109.73 yen <EURJPY=R>. The dollar was down 0.1 percent at 91.20 yen <JPY=>, staying above its 200-day moving average at 90.90 yen.
Earlier, Dai Xianglong, chairman of $114 billion China's National Social Security Fund, said the euro would gradually stabilise, relieving some in the market who have fretted that the euro zone debt crisis could prompt central banks, including China's, to cut their euro reserves. [
]The euro was also helped by China confirming exports jumped 48.5 percent in May from a year earlier, which buoyed shares and riskier currencies. [
]The Australian dollar rose 1.7 percent against the U.S. dollar <AUD=D4>, buoyed by strong Australian jobs data, while a rate rise in New Zealand dollar lifted the Kiwi 1.5 percent versus the U.S. dollar <NZD=D4>.
(Additional reporting by Jessica Mortimer)