Post #4963 by Aussi on the Mechanical Investing board

Investment Strategies / Mechanical Investing

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10 years back is 2016. That period has been mostly a bull market without ANY bear market. Just a couple of shortish corrections.

Any backtest which doesn't include at least the 2008/2009 bear market will be telling you sweet nothings

Paraphrasing, all good stocks go up for the same reasons, poor performing stocks go down for different reasons.

Would a backtest that included the Dotcom bust be relevant to the GFC bust? I have not checked to see if this is true. Does anyone have insight on this. Having now just contemplated RayVt's statement, I am not sure including the GFC decline helps selection of a screen that will perform in the next major decline. I can only think that something like BCC protects you in a decline and then select screens that do well in a bull market.

Aussi who has used backtests over the longest possible period

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