For the first half of 2019, based on its outlook for non-OPEC production and global demand, and assuming flat OPEC production, the IEA said the implied stock build is 2 million bpd. On Wednesday, three sources familiar with the matter told Reuters that OPEC and its partners are discussing a proposal to cut oil output by up to 1.4 million bpd for 2019 to avert an oversupply that would weaken prices.