A lot of my work during late September and early October focused on the causes of the liquidity shortage and interest rate spike in the overnight interbank/repo lending market that occurred in mid-September, which I summarized in my article here on this platform, The Most Crowded Trade.
Most people haven't followed the interbank/repo liquidity issue and aren't familiar with it, nor should they be expected to be. However, I consider it to have been the biggest financial event of the year, even though it's not really on the front page of financial media. It