If so, aren't you really saying that the markets are inefficient most of the time? And if so - are markets really efficient then?
Point taken, perhaps "efficient" is a misguiding word because it is not meant to infer that markets are efficient only when priced at fair value. Put it this way... markets are elastic, the anchor point is the fair value (which itself is in constant motion), sometimes they stretch above, sometimes they stretch below, the further away from the anchor point the grater the pull towards it. What makes markets efficient is is the pull towards the anchor, not necessarily when they're priced at the value itself. To emphasize the point, while day-traders trade ticks, longer-term traders consider 50 DOW points rounding errors.
I believe you are referring to the long period Medallion tried to apply it's proven algos to the S&P500 but failed because there was a mistake in one line of code (the comparative S&P price was fixed instead of being a moving average), that fixed, the S&P algo outperformed all others. Medallion does not classify its funds as short-term or long term... they let the objective reach regardless of the time it takes.started a long-term fund based on fundamentals/long term trends and it underperformed their main fund by a wide margin
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