If I can add something - from the macro-economic perspective, it kind of make sense that we loose out 40-50% from the tops as earnings are projected to fall by 40% on aggregate this year, taking 2-3 years to recover after that.
It doesn't look like the market is pricing correctly the impact this will have on cash flows... (I did my thesis on merger and acquisition so pricing a company is somehow the basis... and the most robust is often DCF... so cashflow based)