Because X mega=cap stock went up (largely as a result of unmentioned central bank purchases), you should've put your money on that stock. It's not really investing. There is no discussion of the valuation or the underlying prospects of the underlying prospects. It is the diversion of savings into vehicles with higher past returns. There is no way to know how this all turns out again. This is not the first extended period during which central banks have propped up equities and suppressed bond yields. They're well aware that past episodes have been followed by 50-plus percent declines so that policies are slow to be discarded.