Owner's Choice is a stock market game, but is really more about pushing your luck than making smart investments. The great thing about Owner's Choice is that it plays fast (about 30 minutes) and everyone is engaged throughout the game, since your fortunes depend on the actions of the other players as well. It is a great little filler that works really well with 4 or 5 people.
This overlooked gem is a great, fast-playing, family game with a stock market theme. The dice keep the market random, but overall trends are predictable providing players with some control. Perhaps its best point is its short (less than 30 min) playing time, so even if fate is against you, you don't have long til you can try again.