One of several regional stock exchanges located throughout the U.S. As the name states, the exchange is located in Boston, Massachusetts. The BSE is the third-oldest stock exchange in the U.S. as it was originally founded in 1834. Nasdaq purchased the BSE in 2007 for $61 million. Its normal hours of operation are 8am to 7pm on weekdays except for holidays. The exchange formerly owned two subsidiaries: the Boston Options Regulation and the BSE Clearing Corporation.