U.S. stocks erase prior session's gains on Spain

SAN FRANCISCO (MarketWatch)
U.S. stocks tumbled more than 1% Wednesday, giving up the prior session's gains, as mounting stresses on Spain's banking system and a retreat in pending home sales erased any recent optimism about the euro zone's outlook
The Dow Jones Industrial Average fell 160.83 points, or 1.3%, to 12,419.86, with only Intel Corp.  ending higher among 30 components
The S&P 500 dropped 19.10 points, or 1.4%, to 1,313.32
All 10 S&P 500 sectors ended lower, led by pullbacks in energy and financial stocks
The Nasdaq Composite lost 33.63 points, or 1.2%, to 2,837.36
For the month that ends Thursday, the benchmark indexes are down at least 6%