Answer:
A well-respected chairman of the Federal Reserve Bank suddenly resigns
Step-by-step explanation:
A non-diversifiable or systematic risk, is a risk which is common to a whole market or class of investments and not just limited to just a particular company or investment.
Non-systematic risk is a risk common to just an investment or a company.
If the chairman of the Federal Reserve Bank suddenly resigns, it would affect a wide range of investments in the market and not just a company, which is an example of a non-diversifiable risk.