15.401 Finance Theory
MIT Sloan MBA Program
Andrew W. Lo
Harris & Harris Group Professor, MIT Sloan School
Lecture 21: Efficient Markets
© 2007–2008 by Andrew W. Lo
, Critical Concepts 15.401
Motivation
Powers of Observation
Behavioral vs. Rational
The Triune Model of the Brain
The Adaptive Markets Hypothesis
Conclusion
Readings
Lo (2005, 2007)
© 2007–2008 by Andrew W. Lo Slide 2
Lecture 21: Efficient Markets
, Motivation 15.401
Theory of Market Efficiency:
No Free Lunch, No Arbitrage
Prices Fully Reflect All Available Information
Prices Follow Random Walks
Trade-Off Between Risk and Expected Return
“Active” Management Does Not Add Value
© 2007–2008 by Andrew W. Lo Slide 3
Lecture 21: Efficient Markets