Asked by CNBC's Kelly Evans to explain how US stocks have continued to outperform while the 10-year Treasury yield has remained anchored below 2.5%, Cashin acknowledged that, during a career that's spanned more than six decades, he's never seen anything like today's market.

And given global stocks' strong performance this year, with markets weathering a series of political crises, natural disasters, terror attacks and other nominally destabilizing events (with a little help from central banks, of course) – Cashin says the outlook isn't as dire as some would believe.

"Right now, Europe's doing all right emerging markets are okay, and maybe they're not going to take away the punchbowl that quickly - so we'll see," Cashin said.

In September, the Fed suggested that while it would likely raise interest rates more quickly than previously believed during the coming quarters, median forecasts for the Fed funds rate in 2019, as well as the longer-run median target, declined compared with a set of forecasts released in July.