Sulphur continued to break historic records in most key international markets at the start of May as the scarcity of spot supply propelled prices higher, which triggered production cuts at some downstream markets, and increased costs in other industrial sectors. The effective blockade of the Strait of Hormuz, which halted the flow of Middle East supply, has forced desperate buyers to compete for the limited available spot cargoes, primarily from North America. Although fresh transactions were limited, export and delivered prices climbed higher, and market sentiment remained jittery. QatarEnergy hiked its sulphur price to $740/t f.o.b., a new record high for this contract since its inception in August 2013.