MarketWatch | Oil prices headed for first weekly loss in a month MarketWatch Oil futures fell on Friday, ready to post their first weekly loss in a month as recent figures that suggest further growth in U.S. crude production. Traders also looked for clues from members of the Organization of the Petroleum Exporting Countries as ... OPEC cut doubts put oil on track for biggest weekly drop in a month Murky oil inventory picture leaves market grappling for clarity Oil on track for worst weekly decline in a month |