| > The Fed has been reducing the size of its balance sheet, letting the Treasuries and mortgage bonds it bought following the financial crisis roll off. In turn, that reduces the amount of cash reserves banks hold at the Fed. I'm somewhat skeptical that the reduction in Fed balance sheet is the impetus for the recent surge in repo rates, especially since the Fed ended its balance sheet unwind in August. From August 2014 to January 2018, the Fed held $4.4 trillion in assets [0]. From 2014 to 2016, overnight repo rates remained stable and low [1]. In December 2015, the Fed began its hiking cycle. From this point onwards, repo rates began drifting up, consistent with an increasing fed funds rate [2]. It would appear that the changes in repo rates were not driven by Fed balance sheet during this period. Starting in January 2014, banks held $2.4 trillion in excess reserves at the Fed, peaking at $2.7 trillion in August 2014 [3]. By January 2018, excess reserves held at the Fed had fallen to $2.1 trillion, independent of any change in the size of the Fed's balance sheet. In 2016, repo rates remained steady, despite a $400 billion decrease in excess reserves. In 2017, overnight repo rates drifted up, despite an increase in excess reserves of $200 billion. Here, repo rates do not exhibit any obvious impact from fluctuations in excess reserves. As Fed balance sheet declined by $700 billion in 2018, excess reserves declined by roughly the same amount. However, even as Fed balance sheet continued shrinking in 2019, repo rates held fairly steady, corresponding to the stable level of the effective fed funds rate. Given all this, it doesn't look like reductions in Fed balance sheet have been the sole driver of declining excess reserves, nor does it appear that the quantity of excess reserves correlates strongly with overnight repo rates. Furthermore, the Fed announced an August 2019 conclusion of the balance sheet unwind in July's FOMC statement. Finally, excess reserves held at the Fed are now 1000x greater than they were in 2007. In short, the recent spike in repo rates happened despite a massive overhang of excess reserves and in the absence of a shrinking Fed balance sheet. I wonder if the decline of the interbank loan market, which serves as a source of short term funding for banks, is related. At the time the Fed discontinued reporting interbank loan volume (2018), volumes had declined ~75% from precrisis levels [4]. Such low volumes were last seen in 1979. This, in part, explains the large amount of excess reserves held by banks. If they do not have confidence they will be able to borrow when they need to, they must maintain such reserves. [0] https://www.federalreserve.gov/monetarypolicy/bst_recenttren... [1] https://tradingeconomics.com/united-states/repo-rate [2] https://fred.stlouisfed.org/graph/?g=URW [3] https://fred.stlouisfed.org/series/EXCSRESNS [4] https://fred.stlouisfed.org/series/IBLACBW027NBOG |