It's the question investors everywhere are wrestling with: Are asset prices in a bubble, or do they simply reflect the fact that the global economy is growing once again?
For Marc Faber, editor of the Gloom, Boom & Doom Report, the answer is clear. In fact, he says the bubble may already be bursting.
"I think it's a colossal bubble in all asset prices, and eventually it will burst, and maybe it has begun to burst already," Faber said Tuesday on CNBC's "Futures Now" as the S&P 500 lost ground for the second-straight session.
Of course, Faber has long been expecting a market decline. But for the precise reason that stocks have simply continued to rise, he's now become even more bearish.
"Obviously I've been wrong in the sense that I expected a correction to occur over the last two years, and it hasn't happened since October 2011, when the S&P was at 1,074. We've gone up in a straight line, without a larger correction than 11 percent, and I think we're not going to have a correction, but we're going to have a bear market," he said.
(Watch Marc Faber discuss his call Wednesday on "Closing Bell" at 3:10 pm ET)