A paper* argues that many popular return anomalies have materially diminished in strength and significance over time, and relates these findings to increased anomaly-related trading by a.o. hedge funds. The factors which have weakened according to the study include the well-known size, value, momentum and low-volatility.
We are puzzled by these findings, as we find that our quantitative strategies, which are based on such anomalies, have generated returns in real life that are highly consistent with the figures we found in our original portfolio simulation, for developed as well as for emerging markets. Perhaps this has to do with the fact that we use more sophisticated alpha factors than the ones generally considered in the academic literature.
Onze onderzoekers publiceren veel whitepapers die zijn gebaseerd op hun eigen empirische onderzoek, maar ze kijken ook naar kwantitatief onderzoek dat door anderen is gedaan. David Blitz, hoofd Quant Equities Research, vertelt over opvallende externe papers.