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 _    _     _____     ______    _____   __    __  
| |  | ||  |  ___||  /_   _//  |  ___|| \ \\ / // 
| |/\| ||  | ||__      | ||    | ||__    \ \/ //  
|  /\  ||  | ||__     _| ||    | ||__     \  //   
|_// \_||  |_____||  /__//     |_____||    \//    
`-`   `-`  `-----`   `--`      `-----`      `

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發送短信 : Accounting for Derivatives