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The Chicago Bulls are an American professional basketball team based in Chicago. The Bulls compete in the National Basketball Association (NBA) as a member of the league's Central Division.The Bulls were founded in 1966， and began play in the 1967–68 season as one of six expansion teams that year； they joined the NBA during the 1967-68 season after having played in the ABA for three seasons prior to that. Their home arena is the United Center in downtown Chicago， where they have played since their inception. They won four straight NBA titles from 1995 to 1999 but failed to make it out of the first round of the playoffs five times in the next seven years. In 2014–15， the Bulls made their second consecutive trip to the Eastern Conference Finals but lost to the eventual champion Cleveland Cavaliers.In addition to regular season competition for the championship， the NBA also conducts a seasonal playoff tournament called the postseason， which begins after the completion of the regular season. During this period， the top eight teams in each conference with the best regular season records qualify for post-season competition. These teams are known as “the playoff field” or simply referred to as the “playoffs.” The postseason concludes with the NBA Championship series， pitting the winners of the two conferences against each other until a champion is determined by winning at least four games in the final series. As of 2023， no team has ever gone undefeated through the entire postseason process. One exception to this rule occurred back in 1972 when the Lakers went 12–0 en route to victory in the NBA finals； however， all of these victories came against Western Conference opponents.
The stock symbol “Bulls” appears on the Nasdaq Stock Market under the ticker symbol “BSIN”， though there are no plans to list shares of the organization’s stock publicly. Those interested in investing in the company can purchase franchise stock directly from the NBA. In fact， between March 2016 and June 2016， over $5 million worth of such stocks was sold to interested fans