Reuters | Oil prices firm, stay in tight range as stocks data awaited Reuters Capping any upsurge has been an increase in U.S. shale oil drilling after WTI rose firmly above $50 a barrel in December following OPEC's sealing of the deal, which also included several non-OPEC producers such as Russia. "Market-wise, we have seen ... Oil prices end lower as traders fret over Chinese demand, US supply growth The best way to play the oil market today Oil price will soar without investment in capacity, says watchdog |