US STOCKS-Wall St ends lower on jitters over upcoming Crimea vote
* Caution ahead of Sunday's referendum in Crimea
* U.S. consumer sentiment slips; bad weather eyed
* CBOE Volatility index surges 10 pct
* Indexes down: Dow 0.3 pct; S&P 0.3 pct; Nasdaq 0.4 pct
By Angela Moon
NEW YORK, March 14 (Reuters) - Wall Street ended lower on Friday with all three major stock indexes down for the week, as concerns over tensions between Ukraine and Russia escalated ahead of a referendum in Crimea this weekend.
The S&P 500 ended below a key technical support level of 1,850 for the second day. The index also ended down 2 percent for the week, its biggest weekly loss since late January.
Moscow shipped more troops and armor into Crimea on Friday and repeated its threat to invade other parts of Ukraine in response to violence in Donetsk on Thursday night despite Western demands to pull back.
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 9.9 percent to 17.82. Continuación...