OPEC+ expects global oil markets will continue to tighten this year even as they revive output, but then flip into surplus again in 2022. The data — to be presented to the group's Joint Technical Committee on Tuesday — ought to reassure the coalition that they can proceed with a widely expected supply increase for October. Ministers will discuss policy on Wednesday. Meanwhile, Gulf of Mexico crude producers are expected to resume service gradually after Hurricane Ida, and the EIA will release its weekly U.S. inventory data later in the day. WTI had its biggest monthly loss since October.