One minor elephant in the room that only a few seem to be mentioning is the 500+ point selloff on Thursday. On Thursday evening, the economist talking-heads expressed some confusion about what was driving that sell-off on that particular day. There was vague talk of problems in Europe, although there has been worse news out of the Eurozone for months without that kind of drop. On Friday, we get the S & P announcement…
Someone in S&P leaked the downgrade ahead of time?
So your upside would essentially have to be a huge amount of money, but of course you're much more likely to get caught if you're moving around such a large sum.