You shouldt be able to find immediate arbitrages in a market.
Says Randomness is a key charachteristic of a fair market.
The very act of predicting, can actually affect the stock price in the short term. Hence high frequency trading might be the only way to consistenly beat the market?
Brings to mind Shrodinger’s Cat, when you observe the stock price or predict it, you essentially, measure it, and next thing you know it is no longer there?