U.S. shale producers have started adding more drilling rigs in response to rising oil prices and improving confidence about the outlook for 2018. Experience shows changes in the number of rigs drilling for oil in the United States tends to follow changes in WTI prices with a lag of about 16 to 20 weeks. The active rig count peaked in mid-August and then declined through September and October, in response to the earlier peak and fall in prices between February and mid-June. But WTI prices hit a recent low around June 21 and have been on an upward trend for 22 weeks so […]