"The market has also reacted in a way that the OPEC-non-OPEC decision has been earnest and practically successful because the prices, after a 20-day slump, returned to the $55/d domain indicating that the OPEC has lived up to its output cut plan."
In December 2016, the Organization of the Petroleum Exporting Countries (OPEC) reached a landmark agreement with Russia and other non-members to proceed with the plan and slash oil production by nearly 1.8 million barrels a day for six months starting January 2017.
The agreement exempted key member Iran from the plan, allowing it to increase its production by 90,000 bpd to reach pre-sanction levels of around 4 million bpd.
Nigeria and Libya were also exempted from the planned output cut due to internal conflicts which have already decreased their crude production.