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The Dow Jones Transportation Average (DJTA, also called the "Dow Jones Transports") is a U.S. stock market index from S&P Dow Jones Indices of the transportation sector, and is the most widely recognized gauge of the American transportation sector. It is the oldest stock index still in use, even older than its better-known relative, the Dow Jones Industrial Average (DJIA).〔(【引用サイトリンク】work= Street Authority web site )〕 ==Components== The index is a running average of the stock prices of twenty transportation corporations, with each stock's price weighted to adjust for stock splits and other factors.〔 As a result, it can change at any time the markets are open. The figure mentioned in news reports is usually the figure derived from the prices at the close of the market for the day. Changes in the index's composition are rare, and generally occur only after corporate acquisitions or other dramatic shifts in a component's core business. Should such an event require that one component be replaced, the entire index is reviewed.〔(【引用サイトリンク】work= official web site )〕 , the index consists of the following 20 companies:〔〔Seeking Alpha, (Dow Jones Transport Index at New Highs ). May 19, 2008.〕 Alaska Air Group replaced AMR Corporation on December 2, 2011, after AMR corp. filed for bankruptcy protection. Effective October 30, 2012, Kirby Corp. replaced Overseas Shipholding Group, Inc.〔(【引用サイトリンク】title=Dow Jones Indexes Press Room | Kirby Corp Set to Join the Dow Jones Transportation Average )〕 (as of Sept 2014) 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「Dow Jones Transportation Average」の詳細全文を読む スポンサード リンク
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