 Well, it has a lot of people thinking of the stock market differently. A William and Mary economics professor says trading has become interchangeable with things like online sports betting. He says it's part of a gambling zeitgeist. On Wall Street, investors sent the Nasdaq and S&P to new record closes on gains of a tenth to more than a quarter percent. The Nasdaq rose 51, the S&P 6. The Dow fell a tenth of a percent, 31 points. Joan Doniger, Bloomberg Radio.