The fact is that market "crashes" are never really predicable never occur because of one or two events -- they occur after the bull market exhausts itself and is looking for any excuse to "revert to the mean" -- and that "excuse" is given the blame for the crash.  Although the current bull market appears to have some  room to run yet, it would be foolish to ignore the MANY technical indicators the clearly indicate this bull market is on borrowed time. In fact it would have ended years ago if it weren't for CB intervention which is just going to make the inevitable decline all that much worse. The scary part is that we've now have an entire generation of young money managers who actually believe the FED will not let the stock market fall to any appreciable extent -- they've never seen what happens when the market forces take control of the market from the CB's of the world. For the sake of everyone's retirement portfolio, I hope these youngsters are paying attention.