發送短信 : The performance of commodity trading advisors: A mean-variance-ratio test approach

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