Stock prices always tend to drop until the president is decided, and they are bought out after November, but...

$Dow Jones Industrial Average(.DJI.US)$ There also seems to be a prophecy that a financial crisis worse than the Great Depression will occur as it is! Well, even if you don't make a prediction, if you think about America's debt as it is, you can predict that it wouldn't be strange if that happened normally! The question is what triggers it?