Overview
Price Anomalies are observed patterns in the markets that cannot easily be accounted for with the efficient market hypothesis
Common Anomalies
- Calendar Effects - anomalies that occur around certain days on the calendar.
- S&P 500 Index Change Effect - anomalies that are related to the change in the composition of the S&P 500
- Analyst Anomalies - anomalies related to the analyst recommendations
- Earnings Announcements
- Fama French Anomalies - the Fama French Factor Model (which includes value and size factors) is considered by some to be anomalies.