The “Exit” Problem: Time To Sell?

 | Dec 11, 2017 12:01PM ET

Last week, I discussed the issue of “bubbles” in the market. To wit:

Market bubbles have NOTHING to do with valuations or fundamentals.

Hold on…don’t start screaming “heretic” and building gallows just yet. Let me explain.

Stock market bubbles are driven by speculation, greed, and emotional biases – therefore valuations and fundamentals are simply a reflection of those emotions.

In other words, bubbles can exist even at times when valuations and fundamentals might argue otherwise. Let me show you a very basic example of what I mean. The chart below is the long-term valuation of the S&P 500 going back to 1871.