Via FT, me cruce con un post de James Montier en el cual explica porque la posición de la troupe de PIMCO sobre las estrategias de reversión a la media es un poco prematura; a pesar de la existencia de una nueva Normal (distribución).
In a recent article  Richard Clarida and Mohamed El-Erian of PIMCO argued that the ‘New Normal’ offered at least five implications for portfolio management.
I. Investing based on mean reversion will be less compelling
II. Risk on/risk off fluctuations in sentiment will continue
III. Tail hedging becomes more important
IV. Historical benchmarks and correlations will be challenged
V. Less credit will be available to sustain leverage and high valuations
Implications IV and V seem pretty reasonable to me. However, reports of the death of mean reversion are premature. I fear that the authors are confusing the distribution of economic outcomes with the distribution of asset market returns. The distribution of economic outcomes may well turn out to be flatter, with fatter tails than we have previously experienced.
However, asset markets have long suffered such a distribution; it has proved no impediment to mean reversion based strategies. In fact, the fat tails of the asset market have provided the best opportunities for mean reversion strategies.