Joining us now is Abby Joseph Cohen, Columbia Business School professor and retired Goldman Sachs partner. And great to have you. On the day that we crossed through the 7000 threshold on the S&P 500, I know it doesn't mean a lot fundamentally, but it is a big round number.And I wonder what your take is on this continued a i boom. You know, a small CEO said just now his customers are starting to realize that it's sustainable and so are aggressively building up their equipment. Well, I'm delighted to be here ...