May 06, 2026 — A proposed regulatory shift that would lower capital reserve requirements for U.S. banks could revive bank activity in capital markets, help banks recapture market share from nonbank competitors and potentially give U.S. banks a permanent structural advantage over European rivals.
In March 2026, the U.S. Federal Reserve Bank issued a proposal that represents a fundamental reversal in regulatory philosophy. In recent years, U.S. banks built up significant levels of Common Equity Tier 1 (CET1) capital to serve as a buffer against a looming “Basel III endgame” that threatened to impose a roughly 20% hike in capital requirements. Across the industry, U.S. G-SIBs are currently holding capital ratios 2.4 percentage points above the regulatory requirement as a defensive moat against future increases. With the Fed’s new proposal, the rationale for these massive excess buffers has evaporated.
“The Fed’s shift toward Basel III neutrality and other changes to the regulatory architecture signal a departure from the post-crisis era of blunt-force regulation and a move toward a more calibrated, pro-growth framework that rewards balance-sheet efficiency,” says Minal Chotai, Global Head of Cost & Capital Analytics at Crisil Coalition Greenwich and author of Lower capital requirements set to unleash bank market-making.
As banks move to strategically optimize capital under the new rules, the “delta” between actual and required capital reserves will be opportunistically redeployed into the markets. The biggest impact could be seen in capital markets, where the rules revision could allow banks to expand balance sheets and revive some of the businesses they pulled back from as a result of higher capital requirements.
“The revised rules would remove the cliff-effect penalties of the G-SIB framework that have discouraged banks from expanding low-margin, high-volume businesses,” says Minal Chotai. “This directly benefits U.S. Treasury market-making, agency MBS and G-10 repo desks, which will now be able to support broader market liquidity.”
Also, certain high-notional and long-dated products potentially sidelined by higher reserve requirements are already seeing a significant structural reprieve. For example, capital relief will allow banks to offer more competitive pricing on long-dated FX and interest-rate derivatives, making essential hedging significantly more affordable for corporates.
“As banks’ cost of capital drops, competition will force a pass-through to the client in the form of compressed bid-ask spreads in U.S. Treasuries, corporate bonds and OTC derivatives,” says Minal Chotai.
A New Competitive Advantage for U.S. Banks?
The Fed’s revision should make U.S. banks more competitive against both nonbanks in the United States and banks abroad. For the past decade nonbank market makers have won market share from banks limited by high capital floors and rigid leverage ratios.
“The 2026 revisions should act as a primary catalyst for reintermediation,” says Minal Chotai. “The revised rules will allow banks to utilize their lower cost of funds and newly efficient capital structures to win back high-quality mandates that had migrated to the unregulated sector.”
The updated regulations could also potentially create a structural advantage for U.S. G-SIBs over European banks. “While European banks remain largely committed to the revised regulatory framework, U.S. banks may find themselves with greater balance-sheet flexibility to absorb risk, and price large-scale client transactions more competitively,” says Minal Chotai.