Disclosed is an internal combustion engine which is to be mounted on automobiles or the like and in which an improvement has been achieved in terms of startability and combustion stability during warm-up operation. A golf club head 1 has a face part 2, a crown part 3, a sole part 4, a side part 5, and a hosel part 6, which are formed of titanium or a titanium alloy. One or more parameters of a contingent claim in the replication set may be determined as a function of one or more parameters of a derivatives strategy and an outcome of the event.