Here is a brief breakdown of some of the more famous bubbles in history.
the dutch tulip bubble (1630, first ever recorded)
the south sea bubble (1720)
Japan stock/real estate bubble (1990)
.COM bubble (2002)
USA housing bubble (2008)
Where is the next bubble going to appear. I know the bond market is in a 100 plus bubble and this is where im placing my bets.
I fully agree with you that the bond market has been experiencing great difficulties for a long time. The price in some market segments is so high that there is obvious overbought or oversold. the bond market is completely dependent on the rumors that all traders use. There are no obvious real reasons for the rise or fall, only rumors.