Central banks have created a bubble in the stock market, which will come down "very, very hard" when it finally prices in a series of Federal Reserve rate hikes, Black Swan investor Mark Spitznagel said Tuesday.

While the collapse of the bubble isn't a Black Swan event in the sense that it is not an unforeseen or unpredictable event, Spitznagel said he would still call it one because the market is pricing it as a Black Swan.