Kevin Shea, CEO of Disciplined Alpha, a systematic investment manager in Boston, suggests the S&P 500 index may be due for another multi-year period of 0% returns.

Shea provided, in a monthly update seen by Opalesque, a very long-term cumulative return of the S&P 500. The up-to-date chart uses data from FactSet and starts on January 31st, 1928. As one can see in t