Despite geopolitical uncertainty, uber-bull Jeremy Siegel still believes the market is going to continue to climb higher.
The widely followed Wharton School finance professor has been calling for the Dow Jones industrial average to hit 18,000 by year-end, and said he now thinks it could possibly hit 19,000.
The confluence of low inflation, still-low interest rates and one of the "best quarters" for earnings are ingredients "for continued upward movement on this bull market," he said Tuesday on CNBC's "Closing Bell."
Right now, the market is selling at 16.5 times 2014 earnings, Siegel noted. To get Dow 18,000, it would need to sell at 17.5 times earnings, "a very reasonable multiple given the interest rates." On top of that, in 2015, earnings are expected to increase another 6 percent to 10 percent.