NYMEX-Crude holds above $91 after sharp rise, Middle East eyed

SINGAPORE, Oct 4 (Reuters) - U.S. crude futures held steadyabove $91 per barrel on Friday, after rising 4 percent in theprevious session on escalating tensions in the Middle East,while continued global economic concerns are expected to weighon prices. FUNDAMENTALS * Front-month NYMEX futures fell 21 cents to $91.50per barrel at 0010 GMT, poised to end the week marginally lower. * Brent futures ...