Crisis Lessons

The lessons that Aswath Damodaran learned from the crisis (Oktober 10, 2009):

"A few posts ago, I mentioned that I was working on a presentation reflecting the lessons that I learned from the crisis. I had also promised to post the presentation when it was ready.

While you can read about the specific lessons that I have taken away from the last year in the presentation, here are the general points I want to make:

1. These are the lessons that I have learned. In other words, this is my personal odyssey and I do not expect everyone to have learned these lessons, nor do I feel the urge to impose them on others.

2. The common theme across the many lessons is that I am much more wary about using past or historical data, whether it be at the company level (profitability, risk etc.) or at the macro level (equity risk premiums). Mean reversion, i.e., the assumption that numbers revert back to historical averages, has served us well, at least in developed markets for a long time, but a blind adherence to it can decimate companies and portfolios.

3. At a gut level, I feel that I have a better understanding of risk and the need for risk premiums now than before the crisis. Fundamentally, I believe that this crisis was precipitated by a belief that we can measure and control risk, when the nature of risk is that it cannot be ever fully measured or controlled.

4. I would not classify myself as a behavioral economist, but I am more willing to give behavioral finance a place at the table when we think about solutions to corporate finance and investment problems, after the crisis, than before."

The bottom line is that I feel humbled by all the things I do not know about finance and markets and excited at the prospect of exploring these things more."

Aswath Damodarans presentation