Washington cuts bank capital by 5%, and Brussels starts drafting

US banking regulators have proposed cutting capital requirements for the country's largest banks by nearly 5%, according to a report from cryptobriefing.com ^[1]. The same report says European policymakers are now drafting their own package in response, which turns a domestic rule change into a competitive problem for every bank that trades against Wall Street ^[2].

The mechanism is unglamorous and that is the point. Capital held against assets is capital not earning a spread or a commission; less required capital means more of it can be pushed into trading books and loan books ^[5]. Per the same account, JPMorgan Chase, Bank of America and Goldman Sachs all reported strong second-quarter 2026 earnings, helped by higher trading revenues in a lighter regulatory setting ^[4]. The report attributes the timing to broader Trump administration efforts to loosen financial rules and improve US banking competitiveness ^[3].

On size, the report cites analyst estimates that Basel III endgame adjustments could unlock balance-sheet capacity potentially in the tens of billions for the largest institutions ^[6]. Run that backwards: a release measured in tens of billions from a cut of roughly 5% implies a required-capital base in the several hundreds of billions across those firms ^[1]. That is the number worth holding onto, because it sets the ceiling on how much new risk-taking this actually funds.

Europe's answer is being assembled as a European Commission competitiveness report expected around 18 July 2026, proposing legislative changes along similar lines, with reforms that could take effect as early as 2027 ^[7][8]. The agenda reportedly includes lower capital buffers, changes to leverage rules, lighter reporting requirements, and support for a European Deposit Insurance Scheme ^[9]. European authorities have explicitly pointed to US and UK deregulation as the driver, framing this as competitive survival rather than housekeeping ^[10].

The grievance behind that framing is old. Over roughly the past 15 years US banks have taken market share from European rivals, dominating global investment banking league tables and capturing more of the trading revenue pool ^[11], while European lenders carried a fragmented rulebook, negative rates through much of the 2010s, and stricter capital requirements ^[12]. There is also a policy motive that has nothing to do with league tables: larger regional European banks are seen as necessary to finance infrastructure and defence ^[13].

For anyone holding European bank equity, the report's argument is that follow-through on a similar timeline could produce a meaningful revaluation, given the sector's persistent discount to US peers ^[14]. The structural item matters more than the buffer arithmetic. A European Deposit Insurance Scheme would be a real step toward banking union and would compress the risk premium investors apply to banks domiciled in fiscally weaker member states ^[15].

Two things to watch. First, the calendar: a report landing around 18 July 2026 and measures live in 2027 leaves roughly five and a half months to the start of that year ^[2], and the source itself flags that negotiations among 27 member states with different banking sectors and risk appetites make the 2027 date questionable ^[16][7][8]. Second, where the freed US capital actually goes. If it shows up mainly in trading revenue rather than lending ^[5], the competitiveness argument in Brussels gets easier to make and harder to justify on prudential grounds. Note also that this account is single-sourced, and several of its items are reported second-hand rather than confirmed ^[9].