Benchmark Brent crude rallied to an eight-month high last week, but the OPEC/non-OPEC producers in a historic deal to curb output cannot afford to be complacent. The risks are not just from the mid-tier and smaller OPEC producers who have been consistently overshooting their quotas -- a recent OPEC report suggests that non-OPEC collaborator Russia may not be keeping its end of the bargain.
