More than a black swan a year. Here is the compilation from just the last 10 years from Barry Ritholtz.
BTW, he has one of the funniest one-liners ever. He mentioned that he saw the movie, but "what happened in production?"
Hilarious for those whoe also enjoyed the book.
"Assume a black swan" That's from this very funny spoof by the WSJ's Holman Jenkins.