* Yen extends broad slide, focus shifts to data
* Euro lower against the dollar ahead of ECB
* Overnight euro/dollar implied vols rise
By Anirban Nag
LONDON, March 5 The safe-haven yen extended its losses against the dollar and euro on Wednesday as concerns over the standoff between Russia and Ukraine eased somewhat, allowing investors to focus on a slew of forthcoming data.
Markets will still be keeping a close eye on developments in the region after Russia test-fired an intercontinental ballistic missile from a base not far from the east of Ukraine to a range in Kazakhstan.
But for now, traders are shifting their sights to a raft of data including a private sector survey of the U.S. labour market and retail sales out of the euro zone.
The euro was up 0.15 percent at 140.64 yen after gaining 0.8 percent on Tuesday, while the dollar was up 0.2 percent at 102.38 yen after rising 0.8 percent on Tuesday - its biggest one-day gain since mid-January. It was flat against the Swiss franc at 0.8874 francs.
"While the market remains vulnerable to the game of brinkmanship between the West and Russia over the situation in Ukraine, it seems that the markets will need a dose of good data to hold up," said Jeremy Stretch, currency strategist at CIBC World Markets.
Demand for safety faded on Tuesday after Russian President Vladimir Putin played down the prospect of a war in Ukraine, but market players remained on watch.
"I think there's obviously hesitancy to take bigger positions here," said Mitul Kotecha, Hong Kong-based head of global foreign exchange strategy for Credit Agricole.
"There is still a wait-and-see attitude. There's been some relief, but I don't think the market's convinced that this is a sustained relief," he added.
Russian stock markets fell nearly 2 percent on Wednesday, bucking Wall Street's trend, which also kept alive interest in safe-haven currencies.
EURO CHOPPY BEFORE ECB
The euro eased 0.1 percent to $1.3730, having retreated from Friday's two-month high around $1.3825. Investors preferred to stay away from the euro given the risk that the European Central Bank could loosen monetary policy at Thursday's review.
With inflation running well below the ECB's target of just under 2 percent, the central bank is under pressure to do more to drag inflation out of a "danger zone" that threatens to stagnate the region's fragile recovery.
On Wednesday, investors will eye January retail sales and services sector surveys, but CIBC's Stretch added that any move above $1.37 by the would be sold.
"I do not think the market has priced in the risk of ECB action fully," he added.
Indeed, overnight euro/dollar implied volatility, a gauge of how sharp currency swings will be, jumped to 11.50 percent from around 5 percent at the start of the week.
The start of China's annual parliament meeting offered no major surprises, and major currencies showed little reaction.
China announced on Wednesday it would maintain its economic growth target for 2014 at about 7.5 percent signalling that its policy focus would be slanted in favour of reforms and rebalancing the economy.
In the United States, a services sector survey, the private sector ADP employment report and the Federal Reserve's Beige Book, are all likely to offer evidence on the extent to which weather influenced a recent soft patch in economic data.
DIARY-Emerging Markets Economic Events to April 28
--------------------------------------------------------------- MONDAY, MARCH 27 SYDNEY - RBA Deputy Governor Guy Debelle speaks at forex conference in Sydney - 2200 GMT. NEW DELHI - Global Business Summit (to March 28). TUESDAY, MARCH 28 SYDNEY - Reserve Bank of Australia Deputy Governor Guy Debelle to speak at the FX Week Australia conference - 2300 GMT. BUDAPEST - Hungarian Central Bank to discuss the final version of its inflation report. JOHANNESBURG - South African Reserve Bank star