I answered, words to the effect: We can speculate as to what motivates buyers and sellers at any given moment, but of course we'll never know for sure. I can say, however, that, historically speaking, your conventional valuation metrics (price to earnings ratios and such) suggest that stock prices remain pretty compelling. And when you consider what they have to compete with---zero real interest rates---it makes sense that stocks would be trending higher. And while too many governments haven't managed their financial affairs in a manner anyone with a financial affair would deem responsible, companies, by and large, have.
So does that mean we're off to the races? Like I said, we can speculate, but of course we can't know for sure. What we can