Warwick Business School Financial Econometrics Research Centre
Abstract
This paper investigates the modelling of style returns in the US and the returns to
style "tilts" based on forecasts of enhanced future style returns. We use hidden
Markov model to build our forecasts. Our finding that style returns are less
forecastible in more recent years is consistent with the hypothesis that style returns
are the result of anomalies rather than risk premia. The erosion of anomalous
returns as public awareness of their presence is translated into strategies that
arbitrage away the excess returns seems to be a hypothesis consistent with our
modelling results
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