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 decision to launch large-scale Reserve Management Purchases (RMPs) ahead of schedule implicitly signals that its standing repo facility is not functioning as effectively as hoped. This suggests the Fed is opting to inject liquidity directly rather than rely on the facility, which may require future improvements.

The recent uptick in the Fed funds rate was not a direct signal of scarce bank reserves. Instead, it was driven by its primary lenders, Federal Home Loan Banks, shifting their cash to the higher-yielding repo market. This supply-side shift forced borrowers in the Fed funds market to pay more.

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.

Despite the Fed's larger-than-expected asset purchase program, the primary near-term risk is that it may still fall short of the reserves needed for smooth market function, echoing the 2019 repo crisis.

Dallas Fed's Lori Logan has signaled a potential shift away from targeting the Fed funds rate. As the Fed funds market has become inactive and is no longer a true market, targeting a traded repo rate would provide better real-time feedback on liquidity and policy implementation.

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.

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.