All such prediction engines should include an obvious warning -- "If you act on my predictions, then all bets are off." This is why stock market predictions are a waste of perfectly good paper: people try to act on the predictions.
Jim Cramer's stock market predictions hover slightly above chance, only because of the so-called "Announcement Effect" (in other words, they aren't actually predictions). Without that, his claims would have zero predictive value.
Jim Cramer's stock market predictions hover slightly above chance, only because of the so-called "Announcement Effect" (in other words, they aren't actually predictions). Without that, his claims would have zero predictive value.