On September 18, WTI (USO) nominal exposure was approximately 21.9028 million barrels, an increase of 648,000 barrels in a single day, marking the fourth consecutive day of increase; Brent (BNO) futures open interest was approximately 7.455 million barrels, an increase of 85,000 barrels in a single day, marking the sixth consecutive trading day of increase. Click to view complete open interest data and capture changes in funds beyond oil prices.