Reuters | Oil hits 11-day low on expected surge in US shale output Reuters LONDON Oil prices hit their lowest in 11 days on Tuesday on news that U.S. shale oil output in May is expected to post the biggest monthly increase in more than two years, fuelling concerns that U.S. production growth is undermining efforts to cut ... Citi Sees Oil Surging $10 as OPEC Combats Roaring U.S. Shale Oil prices fall on expected surge in U.S. shale output Oil loses momentum |