Considering how our fiscal conservatives are trying to switch the money printer to turbo, I would say it's probably inflationary combined with a lack of confidence in the stock market.
That is what he means... Inflation of all assets caused by bad fiscal policy and both deregulation and regulation causing most of the money to only move around in the upper echelons of society
this really can't keep going on forever. the weekly "ATH" and everything going up is like a pressure bomb that keeps getting pressurized more and more each day.
And because this is all assets, the more assets you already have, the more you gain. And the central banks/etc. will make sure the party keeps on going for you.