Describir: Chicago Board of Trade Addition

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 /_   _//  /_   _//  /_____//  /_   _//  / ____||  |  ___|| | \  / || 
   | ||     -| ||-   `____ `    -| ||-  / //---`'  | ||__   |  \/  || 
  _| ||     _| ||_   /___//     _| ||_  \ \\___    | ||__   | .  . || 
 /__//     /_____//  `__ `     /_____//  \_____||  |_____|| |_|\/|_|| 
 `--`      `-----`   /_//      `-----`    `----`   `-----`  `-`  `-`  
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 _    _   
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