By Claudia Assis
SAN FRANCISCO (MarketWatch) -- Crude-oil futures turned lower Friday, resuming their downward trajectory after spending electronic trading in the black. Crude for June delivery CLM11 -0.61% retreated 70 cents, or 0.7%, to trade at $97.74 a barrel on the New York Mercantile Exchange. U.S. stocks started lower and the dollar rose on worries about elections in Spain.
