page_title: New York Stock Exchange
section_title: 20th century
hierarchical_section_title: New York Stock Exchange / History / Notable events / 20th century
caption_attribution_description: English: Photograph shows stock brokers working at the New York Stock Exchange
context_page_description: The New York Stock Exchange is an American stock exchange located at 11 Wall Street, Lower Manhattan, New York City, New York. It is by far the world's largest stock exchange by market capitalization of its listed companies at US$30.1 trillion as of February 2018. The average daily trading value was approximately US$169 billion in 2013. The NYSE trading floor is located at 11 Wall Street and is composed of 21 rooms used for the facilitation of trading. An additional trading room, located at 30 Broad Street, was closed in February 2007. The main building and the 11 Wall Street building were designated National Historic Landmarks in 1978.
  The NYSE is owned by Intercontinental Exchange, an American holding company that it also lists. Previously, it was part of NYSE Euronext, which was formed by the NYSE's 2007 merger with Euronext.
context_section_description: The exchange was closed shortly after the beginning of World War I (July 31, 1914), but it partially re-opened on November 28 of that year in order to help the war effort by trading bonds, and completely reopened for stock trading in mid-December.
  On September 16, 1920, a bomb exploded on Wall Street outside the NYSE building, killing 33 people and injuring more than 400. The perpetrators were never found. The NYSE building and some buildings nearby, such as the JP Morgan building, still have marks on their façades caused by the bombing.
  The Black Thursday crash of the Exchange on October 24, 1929, and the sell-off panic which started on Black Tuesday, October 29, are often blamed for precipitating the Great Depression. In an effort to restore investor confidence, the Exchange unveiled a fifteen-point program aimed to upgrade protection for the investing public on October 31, 1938.
  On October 1, 1934, the exchange was registered as a national securities exchange with the U.S. Securities and Exchange Commission, with a president and a thirty-three-member board. On February 18, 1971, the non-profit corporation was formed, and the number of board members was reduced to twenty-five.
  One of Abbie Hoffman's well-known publicity stunts took place  in 1967, when he led members of the Yippie movement to the Exchange's gallery. The provocateurs hurled fistfuls of dollars toward the trading floor below. Some traders booed, and some laughed and waved. Three months later the stock exchange enclosed the gallery with bulletproof glass. Hoffman wrote a decade later, "We didn't call the press; at that time we really had no notion of anything called a media event."
  On October 19, 1987, the Dow Jones Industrial Average (DJIA) dropped 508 points, a 22.6% loss in a single day, the second-biggest one-day drop the exchange had experienced. Black Monday was followed by Terrible Tuesday, a day in which the Exchange's systems did not perform well and some people had difficulty completing their trades.
  Subsequently, there was another major drop for the Dow on October 13, 1989—the Mini-Crash of 1989. The crash was apparently caused by a reaction to a news story of a $6.75 billion leveraged buyout deal for UAL Corporation, the parent company of United Airlines, which broke down. When the UAL deal fell through, it helped trigger the collapse of the junk bond market causing the Dow to fall 190.58 points, or 6.91 percent.
  Similarly, there was a panic in the financial world during the year of 1997; the Asian Financial Crisis. Like the fall of many foreign markets, the Dow suffered a 7.18% drop in value (554.26 points) on October 27, 1997, in what later became known as the 1997 Mini-Crash but from which the DJIA recovered quickly. This was the first time that the "circuit breaker" rule had operated.
caption: NYSE's stock exchange traders floor before the introduction of electronic readouts and computer screens
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