US STOCKS-Futures fall as China concerns mount
* EPL Oil to be acquired by Energy XXI for $2.3 bln
* Express slumps after outlook
* Copper drops to lowest level in nearly four years
* Futures down: Dow 42 pts, S&P 5.5 pts, Nasdaq 13 pts
By Chuck Mikolajczak
NEW YORK, March 12 (Reuters) - U.S. stock index futures fell on Wednesday, putting the S&P 500 on track for a third day of declines, as concerns grew over the strength of China's economy.
* London copper, seen as a proxy for China's economic health, fell to its lowest level since July 2010. Recent economic data has shown signs of economic slowing, while with the country's first ever bond default last week has increased concerns that financing deals that use the industrial metal as collateral could unravel.
* Geopolitical issues continued to be monitored by investors as earnings season has drawn to a close and amid a light economic calendar this week.
* Ukraine's government appealed for Western help on Tuesday to stop Moscow annexing Crimea but the Black Sea peninsula, overrun by Russian troops, seemed fixed on a course that could formalize rule from Moscow within days. Continuación...