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 _    _     ______    _____    __   __            
| \  / ||  /_   _//  |__  //   \ \\/ //   ____    
|  \/  ||   -| ||-     / //     \ ` //   |    \\  
| .  . ||   _| ||_    / //__     | ||    | [] ||  
|_|\/|_||  /_____//  /_____||    |_||    |  __//  
`-`  `-`   `-----`   `-----`     `-`'    |_|`-`   
                                         `-`

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Text this: A study on bid-ask spread patterns of Nikkei 225 stock index futures traded on SGX-DT and OSE.