By Claudia Assis
SAN FRANCISCO (MarketWatch) -- Crude-oil futures traded lower Friday, erasing some gains amassed in Asian and European trading hours as most European Union countries agreed to new, tighter fiscal rules, but the decision was not unanimous. In the U.S., lower earnings guidance from large corporations dented sentiment. Crude for January delivery CL2F -0.03% retreated 4 cents to $98.26 a barrel, off the day's lows.