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Running a rolling calculation is is exactly what it sounds like, "running a rolling calculation." There is nothing forward looking about it except for the fact that you are extrapolating those rolling periods into the future and assuming that the same (or something similar) will take place.I'd maybe have some confidence in this if there was some track record of an actual live portfolio replicating certain funds. Hindsight is 20/20.
By definition, running a rolling calculation is 1-month forward-looking, not a hindsight.
Conversely, you have no guarantee that any of these "fantastic" funds will continue to outperform on a truly risk-adjusted basis (i.e. taking all their exposures, and not just a single market factor, into account). As a matter of fact, the S&P Persistence Scorecard repeatedly shows that all winners eventually regress to the mean and below.
By definition, running a rolling calculation is 1-month forward-looking, not a hindsight.I'd maybe have some confidence in this if there was some track record of an actual live portfolio replicating certain funds. Hindsight is 20/20.
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