US STOCKS-Wall St set for weekly loss on concerns over Ukraine
* Caution ahead of Sunday's referendum in Crimea
* U.S. consumer sentiment slips; bad weather eyed
* General Mills warns profit hit by competition
* Indexes: Dow off 0.1 pct; S&P off flat; Nasdaq off 0.1 pct
By Angela Moon
NEW YORK, March 14 (Reuters) - U.S. stocks were little changed in a volatile session on Friday, setting all three indexes up for a weekly decline, as concerns over tensions between Ukraine and Russia escalated ahead of a referendum in Crimea this weekend.
The S&P 500 was below a key technical support level of 1,850 for the second day. Curbing investors' enthusiasm for equities, Russia's navy said fighter jets had started training exercises over the Mediterranean Sea, an announcement likely to raise tensions in the standoff with Ukraine.
Global equity markets were pressured, while gold and the yen strengthened as traders flocked into the safe-haven assets.
The CBOE Volatility index VIX, Wall Street's so-called fear gauge, rose 5.2 percent to 17.07. A key emerging market exchange-traded fund, the iShares MSCI Emerging Markets ETF, gained 0.6 percent to $38.40 after falling nearly 2 percent in the previous session. Continuación...