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Daily fantasy sports (DFS) are a subset of fantasy sport games. As with traditional fantasy sports games, players compete against others by building a team of professional athletes from a particular league or competition, and earn points based on the actual statistical performance of the players in real-world competitions. Daily fantasy sports are an accelerated variant of traditional fantasy sports that are conducted over short-term periods, such as a week or single day of competition, as opposed to those that are played across an entire season. Daily fantasy sports are structured in the form of competitions (typically referred to as a "contest"); users pay an entry fee in order to participate, and build a team of players in a certain sport while complying with a salary cap. Depending on their overall performance, players may win a share of a pre-determined pot. Entry fees help fund prizes, while a portion of the entry fee goes to the provider as rake-off revenue. In the United States, the daily fantasy sports industry is dominated by two competing services; the New York-based FanDuel, and the Boston-based DraftKings. Both companies were established as venture capital-backed startup companies, received funding from investment firms, sports broadcasters, leagues, and team owners, and became known for the aggressive marketing of their services. As of September 2015, both companies have an estimated value of at least US$1 billion, and control 95% of the DFS market in the United States.〔 The two primarily compete against smaller DFS services, such as Fantasy Aces and Yahoo! Sports.〔 The popularity of the daily fantasy format has been credited to its convenience in comparison to season-length games, as well as the focus on major cash prizes in the promotion of these services. Daily fantasy has also been credited with helping to improve television viewership and engagement with sports. Although sharing similarities with the mechanics of season-length games, daily fantasy sports have increasingly been classified as gambling, as players are essentially making proposition wagers on the performance of individual athletes in specific games, and not managing the performance of their selections on a week-to-week basis. The United States' Unlawful Internet Gambling Enforcement Act, which does not consider fantasy sports games to be a form of unlawful internet wagering, has frequently been cited as evidence that daily fantasy games are legal. However, the law only prohibits the transfer of funds related to online gambling, and does not actually affect any other federal or state laws addressing gambling. Daily fantasy services are not allowed to operate cash games in Arizona, Iowa, Louisiana, Montana, Nevada, and Washington due to local gambling laws that classify games with any luck-based elements as being a game of chance, or rulings that explicitly consider daily fantasy sports to be a form of gambling. The daily fantasy industry began receiving increased scrutiny in October 2015, after it was alleged that an employee working for a DFS service had used inside information to win cash prizes from a competitor, prompting investigations by the New York Attorney General and the Federal Bureau of Investigation. == Gameplay == There are several main disciplines of daily fantasy sports competitions, divided into two categories: cash games, and guaranteed prize pool (GPP).〔〔 DFS contests typically utilize a salary cap format, in which players are allotted a maximum budget to spend on athletes for their team, represented as either play money or points. Each athlete has their own cost, with elite athletes having the highest costs.〔(【引用サイトリンク】url=http://venturebeat.com/2015/09/10/how-to-make-a-killer-daily-fantasy-sports-football-roster-on-draftkings-and-fanduel/ )〕 In "Double-up" or "50/50" cash game competitions, the object is to finish with a point total within the top 50% of all participants; players who finish in the top half of the field all share an equal prize that is equal to double the entry fee, while the remainder lose their entry fee. Head-to-head competitions are similar, except that players choose an opponent they must beat to win the prize. Guaranteed prize pool contests have higher stakes, using tiered payouts based on finishing in different percentiles or positions of the field of contestants.〔(【引用サイトリンク】url=http://www.sportingnews.com/fantasy/nba/story/2015-02-12/daily-fantasy-sports-dfs-strategy-how-to-play-5050-h2h-gpp-win-cash-prizes-one-day-draft-kings-tips )〕 Further variations of double-up games, including Triple-up, Quadruple-up, and Quintuple-up, may also be offered.〔 Daily fantasy games exist in a variety of major sports, depending on service, including but not limited to American football (NFL and college football), association football, auto racing, baseball, basketball, cricket, golf, hockey, and rugby.〔 Daily fantasy contests have also been held in e-sports, particularly professional ''League of Legends''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Daily fantasy sports」の詳細全文を読む スポンサード リンク
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