The Pacific Stock Exchange, also known as the Pacific Exchange (PCX), was a regional stock exchange located in California, United States. It was one of the major stock exchanges in the country and operated from 1882 until its merger with the Chicago Board Options Exchange (CBOE) in 2000.

The Pacific Stock Exchange played a significant role in facilitating trading of equities and options for companies primarily based on the West Coast of the United States. It provided a platform for investors, traders, and institutions to buy and sell securities listed on the exchange.

The exchange had a strong presence in the technology and financial sectors, with many prominent companies being listed on its trading floor. It offered a range of services including electronic trading, options trading, and market-making activities.

The merger with the CBOE resulted in the formation of the largest options exchange in the United States, expanding the reach and capabilities of both exchanges. Today, the Pacific Stock Exchange operates as part of the CBOE, contributing to the vibrant and dynamic landscape of the American financial markets.

The Pacific Stock Exchange (PSE) was a regional stock exchange in the United States, serving primarily the West Coast. Originally founded in 1882 as the San Francisco Stock and Bond Exchange, it later merged with the Los Angeles Oil Exchange in 1957, forming the Pacific Coast Stock Exchange. The PSE was known for trading stocks and options and supported companies from tech-heavy California, adding significant importance to West Coast finance.

In the late 1990s, the PSE underwent major changes, including the launch of electronic trading systems. Eventually, in 2006, the exchange was acquired by the Archipelago Exchange (ArcaEx) and later became part of the New York Stock Exchange (NYSE) as NYSE Arca. Today, it operates as an electronic trading platform for stocks and exchange-traded funds (ETFs).