Oil prices slumped by more than $2/barrel yesterday ahead of the expected decision of increase in oil output at the OPEC meeting next week. While Brent crude oil LCOc1 fell by $2.50, or 3.29% to settle at $73.44 /barrel, U.S. crude CLc1 settled by $1.83 lower at $65.06/barrel. In post-settlement trading, U.S. crude drew back further, falling 2.25, or 3.4%, to $64.64/barrel.