hong kong is the only major exchange in the world that closes for bad weather when hong kong hosted a summit for some of wall street’s top executives in early november its aim was to show the city was open to the world in a case of bad timing its financial markets were forced to close early that day the city’s weather observatory issued a typhoon no 8 signal a little before 2 pm on nov 2 causing its exchange to suspend trading in stocks and derivatives for the rest of the day