Euro Markets: Carbon drops marginally after volatile session as gas reacts to supply cut headlines

European carbon saw a volatile end to the week, giving up a strong opening surge to a 10-week high to fall by 2.2% at one stage and eventually recording an 0.4% drop on the day, as allowance prices were whipsawed by a volatile gas market reaction to news that one EU gas buyer was set to be cut off by its Russian supplier this weekend.