I'm guessing if you call something a black swan you get grief from a bunch of pedants .... call 'em gray (even if its actually spelled 'grey' ... speaking of pedants) and its all good.

Analysts at Nomura list 10 "unlikely but impactful events" - "Needless to say, none of them are our base case," the analysts caveat.

Here's the list:

1. Russia on the warpath

2. A surge in U.S. productivity
3. China floats the yuan

4. An exit from Brexit

5. Capital controls in emerging markets

6. Japanese inflation jumps
7. A clearing house crisis

8. Trump takes fight to the Fed

9. Abenomics comes unstuck

10. The end of cash

Bloomberg have more detail on each, here