While these frictions may vary over time, they should generally do so only slowly. 7 The pull of IOER should also be affected by the quantity of reserves in the system. An increase in bank reserves that increases bank assets makes regulatory leverage ratios more binding, raising the shadow marginal cost of bank balance sheets. It also accentuates the competitive frictions I described above, and reduces individual bank demand for additional reserves. 8 As a result, as the level of reserves declines during normalization, marginal balance sheet costs should fall, competitive frictions should lessen, and the demand for additional reserves from individual banks should increase. These factors should strengthen the magnetic attraction of IOER and pull the fed funds rate and other market rates up toward – and at some point equal to or above – the IOER rate. However, excess reserves will remain plentiful for some time, and while that’s the case the FOMC intends to use an ON RRP facility and other tools as needed to complement IOER in controlling the fed funds rate. 9 When the Desk conducts ON RRPs, as in its current testing program, it sells Treasury securities held in the SOMA with an agreement to buy them back the next business day at a pre-determined price. This leaves the size of the SOMA portfolio unchanged, but shifts some of the liabilities on the Fed’s balance sheet from bank reserves to reverse repos.
The results of the testing over the first year suggest that the operations have been successful working with IOER to establish a floor for the level of money market rates. Our analysis has found that, offered at a spread of 20 basis points to the IOER rate, ON RRPs have kept overnight repo rates above where they would otherwise have been, in part by influencing the bargaining power of our counterparties. All of the Desk’s eligible RRP counterparty types participate in the operations, with money funds accounting for the largest share of take-up. Take-up generally increases when the spread between market rates and the ON RRP offered rate narrows. Take-up also rises substantially around quarter- and year-end financial reporting dates, when some money market participants’ access to other overnight investments is more limited. To further examine how ON RRPs might best be structured to supplement IOER in controlling the fed funds rate while limiting the potential for unintended effects in financial markets, the FOMC recently directed the Desk to make several changes to the design of its ON RRP operations.