Rogue Trader

This is the true story of a trader who starts off with a relative small loss and through his unwillingness to admit the mistake, he snowballs it into a massive loss that eventually causes the bankruptcy of a major British bank.

Admittedly this is not a great movie, but I like how those that enjoy high pressure tend to bring this kind of situation on themselves, almost feeding their addiction to be close to the edge of ruin at all times.