發送短信 : Constructing a bond index for Singapore Government securities

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