If you believe this:
It's not difficult to understand the reason for underperformance. We live in a world where information is disseminated almost instantaneously. All the news that could possibly affect the price of publicly traded securities is already known to the millions of traders engaged in buying and selling stocks. And it is immediately incorporated into the price of stocks. The possibility of an individual uncovering something these traders have missed is infinitesimally small.
READ THIS IT WILL HELP:
http://theconservativeincomeinvestor.com/2014/11/30/myth-everything-is-priced-into-the-stock/
