both cases short sell $100, day 1 stock with $100 go up to $150
case A don't do anything
case B take the lose, lose $50 get back the $50 then short again
day 2 go up to $200, case A take the lose and lose $100 total
case A take the total lose is: day 1 $50, day2 = ( $50 * (200-150)/150) = $16.6...