I'm no expert, but I think I get what he said. If I have $100 and I buy a stock worth $90 from you, there's $100 in the economy. If the stock goes up to being

I'm no expert, but I think I get what he said. If I have $100 and I buy a stock worth $90 from you, there's $100 in the economy. If the stock goes up to being worth $110, there's still $100 in the economy. If the stock goes bust, there's still... $100 in the economy.