Asset bubbles are like super-nova stars: once they reach a critical extreme, they implode.
The trouble with inflating asset bubbles is that you have to keep inflating them or they pop. Unfortunately for the bubble-blowing central banks, asset bubbles are a double-bind: you cannot inflate assets forever. At some unpredictable point, the risk and moral hazard that are part and parcel of all asset bubbles trigger an avalanche of selling that pops the bubble.
This is another facet of The Fed's Double-Bind: if you stop pumping asset bubbles, they pop as participants realize the music has stopped, and if you keep pumping them, they expand to super-nova criticality and implode.
There are several dynamics at play in this double-bind.
1. The process of inflating a bubble (for example, the current bubbles in stocks and real estate) requires pushing investors and speculators alike into risky asset classes. This puts the market at increasing risk as everyone is pushed to one side of the boat. ...