Plot Holes *spoilers*
Yeah I know this wasn't exactly a classic to begin with but I thought it was a cool move with a few extremely glaring plot holes...
1. The biggest thing is that there is no way any company could just lose all it's money and have it be inserted into personal bank accounts because of a piece of stock trading software. Anybody with even a SIMPLE knowledge of finance knows this. There are so many failsafes, policies and what not that would protect the bank from losing all it's money just like that. (The only way it could is if EVERY other company in the market lost the same type of money)
2. Ok, so Jim wants to get back at the bank that killed his father. Did he not think about what destroying the bank would do to all the people who had loans, mortgages and what not through that bank? Not to mention all the folks who had jobs through the bank and it's holdings. Really really stupid plot hole here.
3. The economic fallout from a 50 billion dollar company suddenly going under wouldn't simply be "the market soaking up the money" it would be market chaos. Again, a really really stupid plot hole.
Cool movie though and I guess it's a nice "little guy takes down the big guy" plot if you just suspend disbelief.