The Philippine Stock Exchange (Filipino: Pamilihang Sapi ng Pilipinas) (PSE: PSE) is one of the two stock exchanges in the Philippines, the other one being the Philippine Dealing Exchange. It is the primary stock exchange in the Philippines. Aside from being one of the major stock exchanges in Southeast Asia, it is also the first and the longest one operating since 1927.
It currently maintains two trading floors, one in Makati City's Central Business District and one at its headquarters in Pasig City.
The PSE before the mid-1990s was reminiscent of other outcry stock exchanges found throughout Southeast Asia before the technological advancements made during the last decade. On January 4, 1993, the former Manila Stock Exchange started the computerization of its operations using the Stratus Trading System (STS) with a company called Intelligent Wave Philippines. Later that year, on June 15, the former Makati Stock Exchange adopted the MakTrade trading system, the same system used on the Stock Exchange of Thailand and developed by the Chicago Stock Exchange. Both systems were linked on March 25, 1994, producing one set of opening and closing share prices, but orders were queued up on two different books.