whenever FED tightens their monetary policy
1. QE3 should end by early 2015 at the latest
2. fed funds should be hiked to 2% by early 2015
what we know about recent stock bubbles:
nasdaq dot com bubble popped Q1 of 2000
subprime bubble popped Q3 2007
In both of these bubbles, the fed funds rate was hiked to >6% before they popped. We're at 0% fed funds right now.
Volatility is low right now. Check out QQQQ, volatility in 2013 is the lowest since 2005.
Also, the public isn't in the stock market right now. There is still uncertainty and not a lot of hubris, which is prevalent during the final phase of a bull cycle.
2016 maybe, maybe not, wait and see