Just about every bull market in history has been different in some way to other bull markets. The same can be said for bear markets. However, the bigger the party then usually the bigger the hangover.
Suffice to say that the warning signs were there for all them way before the bubbles burst. What sort of warning signs??
-Extreme Optimism(95% of punters convinced trend will continue)
-Complacency
-This time it's different
-Market Thins out coming into a top
-Price Patterns/Cycle tops
Now none of these can tell you the exact top( unless all the patterns are falling in place at the right time and look really convincing which is really rare), but they give a fair idea.
ATM, there is a whole new breed of trader that has no idea of what happened back in 1987 and there are so many derivatives to trade the markets that no one really knows what these things are actually worth. One thing I am relatively sure of is that there is something looming on the horizon that is going to scare the pants off nearly all investors, including me!!
Cheers
Dont bull markets last longer than this? Isnt the overall economy strong and P/E on shares relatively low