First, how much dependence should be placed on financial modelling, which, for all its sophistication, can get too far ahead of human judgement? This decade is strewn with examples of bright people who thought they had built a better mousetrap that could consistently extract an abnormal return from financial markets. Some succeed for a time.
But while there may occasionally be misconfigurations among market prices that allow abnormal returns, they do not persist. Indeed, efforts to take advantage of such misalignments force prices into better alignment and are soon emulated by competitors, further narrowing, or eliminating, any gaps.