No one really knows the impact of QE on the stock market,. Impossible to quantify.
That is incorrect. QE or expansion of the "monetary base" will always increase the price on financial and real assets. it is artificial demand for these assets. since supply/demand curve is eco 101 you should know prices for these assets rise. it trickles down the capital structure and equity prices rise as (expected) return on equity diminishes as well. this explains p/e multiples on fast growing tech companies and multiple expansion in the markets.