At Any Rate US Rates - GSIB and Basel III Endgame Update
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Apr 9, 2026 Teresa Ho, Head of U.S. Short Duration Strategy at J.P. Morgan, explains GSIB surcharges and Basel III Endgame changes. She breaks down effects on repo and funding mechanics. Short-term averaging, smaller surcharge steps, and redesigned short-term wholesale funding are highlighted. Discussion covers year-end dynamics, repo capacity limits, and likely next steps in regulation.
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GSIB Surcharge Drove Year End Repo Tightening
- The GSIB surcharge historically drove year-end balance sheet pullbacks that tightened repo and funding markets.
- Monthly averaging for indicators and smaller surcharge increments will reduce year-end window dressing and lessen recurring repo volatility.
Three Rule Changes That Matter For Funding
- Three key proposal changes target measurement and calibration: averaging measurement dates, narrower surcharge bands, and redesigning short-term wholesale funding.
- Moving cross-jurisdictional activity to month-end averages and cutting short-term funding weight reduces cliff effects tied to point-in-time snapshots.
Short Term Funding Recalibrated Lower
- Short-term wholesale funding is being recalibrated from a ratio to an absolute weighted amount multiplied by a coefficient.
- The component's weight falls from ~30% to ~20% of Method 2 scores, directly reducing repo's contribution to GSIB scoring.