BA (& QF, and others) collect YQ fuel surcharges on their segments which are supposed to reflect such changes. If fare increases are blamed on oil prices, then we should all examine the YQ surcharges closely for a corresponding reduction

Yes, while I agree with you, discussion of the details of these surcharges are better suited for the BA or QF forums. So without going into too much detail, on July 1 with the xCIRnn fares having gone up 60% ex-USA have the surcharges on xCIRnn fares been reduced if purchased from an airline that adds these fuel surcharges? Also, does CX charge these surcharges? If so, that could explain why ex-HKG xCIRnn fares remain closer to past amounts; although I would think you could buy ex-HKG xCIRnn from AA. Now I'm confused.