While markets focus on the G-SIB and Basel III capital proposals, regulators are signaling that changes to liquidity rules are next. These future regulations could have a more significant impact on markets and the Fed's balance sheet than the current capital-focused reforms.

Current repo market stress is a structural problem caused by tight bank regulations, not a simple liquidity issue. To effectively shrink its balance sheet (QT), the Fed must first ease capital requirements. This counterintuitively acts as a nominal growth impulse by freeing banks to lend.

The Fed's SRF is proving ineffective at capping repo rates. Despite rates trading well above the facility's level, usage was minimal. This indicates a market stigma or hesitation, questioning its ability to function as a reliable backstop for temporary liquidity shortages and control rates.

Unlike September 2019, the recent corporate tax day saw no funding crisis. The mere existence of the Fed's Standing Repo Facility (SRF) calmed markets, preventing panic. This psychological backstop, combined with higher bank reserves and a better regulatory environment, proved crucial for stability.

Recent spikes in repo rates show funding markets are now highly sensitive to new collateral. The dwindling overnight Reverse Repo (RRP) facility, once a key buffer, is no longer absorbing shocks, indicating liquidity has tightened significantly and Quantitative Tightening (QT) has reached its practical limit.

Despite market focus on potential changes to the ECB's repo and swap lines, such as extending their duration and size, analysts expect minimal market impact. This is because borrowing at these liquidity facilities has been very low, currently at zero, diminishing the real-world effect of any extensions.

If the Fed adopts a repo rate like TGCR as its policy benchmark, its Standing Repo Facility (SRF) must evolve. It would shift from being a passive emergency backstop to an active tool for daily rate management, similar to how the Fed's RRP and IORB rates currently operate.

The Fed's Standing Repo Facility (SRF) is ineffective because it is a bank-focused tool, while non-bank actors like hedge funds are the primary drivers of volatility. The facility's design highlights a long-standing failure to integrate bank supervision with monetary policy implementation.

The Fed’s Standing Repo Facility (SRF) has been only partially effective at capping overnight funding rates. Its efficacy could be improved through structural changes like making it centrally cleared, offering it continuously for on-demand liquidity, or lowering its rate to separate it from the discount window.