US STOCKS-Wall St climbs as Ukraine worries ease
* S&P 500 comes off biggest weekly decline in seven
* Alibaba will begin U.S. IPO process
* JA Solar soars after results, forecast
* Indexes up: Dow 1.09 pct, S&P 0.92 pct, Nasdaq 1.01 pct
By Chuck Mikolajczak
NEW YORK, March 17 (Reuters) - U.S. stocks climbed on Monday, with the S&P 500 bouncing from its worst weekly drop in the past seven as concerns eased over the situation in Crimea, even as the region voted to join Russia.
The 97-percent vote in Crimea in favor of quitting Ukraine was condemned as illegal by Kiev and the West, with the White House calling Russian actions "dangerous and destabilizing," but the referendum passed without violence.
In response, U.S. President Barack Obama on Monday imposed sanctions on 11 Russian and Ukrainian officials blamed for Russia's military incursion into Crimea, including two top aides to Russian President Vladimir Putin.
The geopolitical tension weighed on equities last week, with the S&P 500 falling 2 percent and the CBOE Volatility index jumping to its highest since early February on Friday. Continuación...