There is one major difference in today's bull market versus previous bull markets which could cause all global equity prices to move substantially higher. (netpicksetfinvestor.com)
The back half of 2017, however, saw an increase in something more common in previous bull markets: mania. (foragerfunds.com)
He, too, notes the extremes of previous bull markets aren't around at the moment, but says while everyone is out there looking for that blow - off moment, maybe this time it really is different and it comes from left - field. (afr.com)