Series 66: 4.3.2.2 Semi-Strong Form Efficient Market Hypothesis

4.3.2.2  Semi-Strong Form Efficient Market Hypothesis

The semi-strong form posits that private information about a security is not immediately reflected in a security’s price, but that public information is wholly and immediately reflected. Thus, the only way to beat the market in the long run is with insider information, so a retail investor is better off investing in a low cost index fund or broad based ETF than relying on active management.