US STOCKS-Stocks tumble on Ukraine tensions; Time Warner skids after-hours
* Fox rallies, Time Warner falls as Fox withdraws merger bid
* Treasury yields fall, gold ticks higher
* Indexes off: Dow 0.8 pct, S&P 1 pct, Nasdaq 0.7 pct (Updates to close; adds quotes, after-hours action)
By Akane Otani
NEW YORK, Aug 5 (Reuters) - U.S. stocks ended down on Tuesday, nose-diving in the afternoon as concerns mounted over escalating tensions in Ukraine.
All 10 S&P 500 sectors ended lower, led by energy stocks, which lost 2.1 percent.
Markets were weak for most of the session, but selling accelerated in the afternoon on reports that Russian troops were massing near the Ukraine border.
"Obviously, the consensus for a long time has been that the market has been due for a correction, so it was ripe for sentiment to change very quickly," said Mark Luschini, chief investment strategist at Janney Montgomery Scott in Philadelphia.
The S&P is down 3.4 percent from its record closing high of 1,987.98 points reached on July 24. Continuación...