If price going up on Friday was in fact a certainty, the market would have already priced it in (or perhaps it has been, hence the recent rise to record highs). No such thing as a free lunch or sure thing in this market, it's silly to suggest that, come Friday, news of yes or no on the QE3 front will prompt a rise.
That said I think the market has already spoken to an extent, why these drops and volatility if QE3 was such a sure thing.
