Losing Momentum?
There is nothing permanent except change – Heraclitus In the early 1990’s Fama and French demonstrated that Company Size and Price-to-Book (Value) explained the majority of investment returns, in what was dubbed the Three Factor model. This was the addition of two factors to the market risk (Beta), that the CAPM stated was the cause of stock returns. These have since expanded to 5 (operating profitability and investment policy), and more recently to 6, as investors have judged Momentum to be a “factor”. It is the last of these that has had the most influence on market behaviour over the past few years, in both directions.…