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

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Text this: British put option on stocks under stochastic interest rate