Brent crude slid to the lowest level in more than four years and West Texas Intermediate also retreated amid concern the global market will remain oversupplied followed OPEC’s decision to keep output unchanged. Saudi Arabia ’s state-run oil company “Sentiment is certainly more bearish,” said Michael Lynch , president of Strategic Energy and Economic Research in Winchester, Massachusetts . “We’re going to drift lower until there’s a serious improvement in the economy, a disruption in supply or an OPEC member actually does something instead of saying that someone else should take action.” Both benchmarks fell 18 percent last month as OPEC maintained its output target, letting prices fall to a level that may slow U.S. production growth. Kuwait’s oil minister said the group is acting to preserve market share amid a global supply glut, after resisting calls from members including Venezuela to cut production at a Nov. 27 meeting […]