US STOCKS-Wall Street to open flat as Ukraine tensions eyed
* J.C. Penney jumps after Citi upgrade
* Myriad Genetics falls after court motion denied
* Futures up: Dow 15 pts, S&P 1.75 pt, Nasdaq 6.5 pts
By Chuck Mikolajczak
NEW YORK, March 11 (Reuters) - U.S. stocks were set for a flat open on Tuesday after a slight decline in the prior session left the S&P 500 within striking distance of its recent record high and amid investor caution as tensions in Ukraine continued.
* Investors were wary in light of events in Ukraine. A pro-Russian force opened fire in seizing a Ukrainian military base in Crimea on Monday and NATO announced reconnaissance flights along its eastern frontiers as confrontation around the Black Sea peninsula showed no sign of easing.
* On Tuesday, ousted leader Viktor Yanukovich insisted he remained Ukraine's legitimate president and commander-in-chief, saying he would return to Kiev and appealing to the armed forces to defy any "criminal orders" handed down by his foes.
* S&P 500 e-mini futures rose 1.75 points and were about even with fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures gained 15 points and Nasdaq 100 futures added 6.5 points.