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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.