Margins for high sulphur fuel oil logged weekly declines in Asia amid sell-offs, while very low sulphur fuel oil (VLSFO) was largely rangebound, data showed on Friday. Prompt-month cracks for 380-cst HSFO (FO380BRTCKMc1) closed at premiums of about $2.25 a barrel, down 40% from the previous week. The cracks reached fresh highs near $4 a …