Do Short Term Flows Permanently Affect Share Prices?
I’d like to think that prices can get out of whack for some period of time, and in that window, the nimble, unbiased, fundamental stock picker can take advantage of overreactions and underreactions. If they don't, then the M&M propositions truly hold, and I don’t have a meaningful job. However, if this paper is right, and it is only flows that matter, then while the M&M theorems are overturned, I don't have a meaningful job either. If it is all about flows, then I shouldn't play the game.
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