A long-standing theory suggests that the market will become more inefficient as more money gets indexed. You’re welcome to argue the validity of if/when that might happen. I believe it’s possible but unlikely to happen on a grand scale anytime soon. But I also believe index funds create pockets of inefficiency that nimble investors can pick at.
The opportunities are due to changes in the underlying index and the reaction by index funds to keep up. Seth Klarman refers to it as mindless selling: Continue Reading…

There are a lot of reasons why stock prices move the way they do. Business performance should account for all of it…in a perfect world. In reality, almost all of it is due to the human element in the market reacting to different stimuli.