...Consequently, Gross said, higher dividend taxes would make those companies less attractive and thus take the stock market down 5 to 10 percent. That's "the ultimate danger here for the stock market," he said. "Dividends are sheltered in 401(k)s, they're sheltered in pension funds. At the margins investors pay dividend tax rates. To the extent that you raise them from 15 to, say, 25 (percent), that implies in terms of equaling after tax rates another 5 to 10 percent down in terms of stock prices. We've been very spoiled for the last 10 years."