Watch the video (10:54): Why Morgan Stanley’s Derivatives Book Jumped $55 Trillion. The video includes corrected bank rankings from the OCC’s Q1 2026 tables.
Four US banks, JPMorgan Chase Bank NA, Citibank NA, Bank of America NA and Goldman Sachs Bank USA, held 79.1% of the entire US banking system’s derivatives book at the end of Q1 2026, down from 87.1% a year earlier, while the total book itself exploded 42.5% to $296.5 trillion.
Below the paid line:
The full five quarter concentration and notional series, worked against each other quarter by quarter, including the Q3-to-Q4 peak and drop that a documented capital rule seasonal pattern predicts, and the same quarter year over year check that tests whether that pattern is the whole story.
Which of the four dealer banks carries the highest capital cost per dollar of book, worked from the Fed’s own June 2026 surcharge table against each bank’s OCC reported risk based capital, with the stress buffer and GSIB surcharge shown as separate addends.
The single quarter value at risk move that tells you which of the four actually leaned into this quarter’s volatility, and which three sat it out.
The Federal Register’s own quantitative estimate of how much the pending GSIB surcharge rewrite would cut capital costs at these exact four banks, and what that does to this whole story once it finalizes.
My worked arithmetic for why a thirteenfold FX revenue jump is hard to square with the deliberate pullback story, and the one piece of documented literature about these same banks that argues the other way.
Below the gate: the Fed’s own $23 billion GSIB surcharge estimate, and the per-bank capital math behind Goldman’s $147 million VaR jump.
The consensus: capital is the moat, and it is real
Ask a derivatives desk why four banks dominate the US market and you get a clean answer. Capital. A swap dealer has to hold collateral, mark exposures daily, absorb margin calls, and carry the position on a balance sheet a regulator stress tests every year. Only a handful of banks have balance sheets large enough, funding costs low enough, and risk infrastructure sophisticated enough to do that at real scale.
Post 2008 capital rules made this explicit. The Global Systemically Important Bank surcharge adds a permanent capital tax on top of the ordinary minimum, scaled to a bank’s size, interconnectedness and complexity. Derivatives activity feeds directly into that score. JPMorgan carries a 4.5% surcharge, the highest of any US bank. Size costs the most. Citigroup and Goldman Sachs carry 3.5%. Bank of America carries 3.0% (Federal Reserve, Large Bank Capital Requirements, June 2026, Table 1). Add the three pieces and the total shows its own arithmetic: the 4.5% minimum CET1 floor, plus a stress capital buffer, plus the surcharge. JPMorgan’s stack is 4.5 + 2.5 + 4.5 = 11.5%. Citigroup’s is 4.5 + 3.6 + 3.5 = 11.6%. Goldman’s is 4.5 + 3.4 + 3.5 = 11.4%. Bank of America’s is 4.5 + 2.5 + 3.0 = 10.0%.
That is a large, durable moat, and I don’t dispute it. Regional banks and most foreign dealers cannot fund a derivatives book against those requirements and still clear a competitive return on equity. The market consolidated into a small dealer club and stayed there for over a decade. The moat is real. This is the correct baseline. What I’m arguing is that the baseline just moved, and the consensus has no mechanism ready to explain why.
It also explains why this is an American story specifically. Risk.net’s own Dealer Rankings 2026 coverage frames it that way: the top US houses expanding while European names lose ground on the same buy side books (Risk.net, “How US dealers flipped the script in OTC trading”, Dealer Rankings 2026 series). The same Fed table that sets JPMorgan’s surcharge also lists the US arms of foreign banks operating here, and the gap is not subtle. Deutsche Bank’s US intermediate holding company, DB USA Corporation, carries no GSIB surcharge at all, and still lands at a total CET1 requirement of 16.0% (4.5 + an 11.5% stress capital buffer), the single highest figure anywhere in the Fed’s table, above JPMorgan’s 11.5% and Goldman’s 11.4% (Federal Reserve, June 2026, Table 1). UBS Americas Holding LLC sits at 9.7%. HSBC North America sits at 9.6%. Home turf costs less. A European dealer running derivatives out of its US subsidiary pays a steeper toll than the American incumbents do, before its home regulator charges it anything at all. That toll alone would keep a European bank’s US book smaller than its balance sheet could otherwise support, independent of anything that happened this particular quarter. Capital, not talent, draws this line.
The full five quarter series, and the shape nobody had drawn
The OCC states the current number in one sentence: “the four banks with the most derivative activity hold 79.1 percent of all bank derivatives” (OCC Q1 2026, p.11). I pulled every quarter behind it, not just the two that made the cleanest headline. Here is the full run, concentration alongside total notional:
This is not a smooth drift, and I am not going to describe it as one. Concentration actually rose in Q2, to 87.3%, before it started falling. Notional rose for two straight quarters to a peak of $231.8 trillion in Q3, then dropped 10.3% in Q4 to $208.1 trillion, before exploding 42.5% in Q1 2026 to a level 28% above that Q3 peak. A rise. A drop. Then a spike. Not a quiet three quarter slide into a sudden cliff.
That Q4 drop followed by a Q1 rebound is not a shape I get to treat as neutral. That shape has a name. It is the exact seasonal pattern documented in the literature on how GSIBs manage their surcharge scores, and I address it directly in the next section rather than skip past it.
I expected the boring explanation here: new entrants diluting the top four’s share by simple arithmetic. It isn’t there. I checked the count quarter by quarter: 1,213 in Q1 2025, a peak of 1,221 in Q3 2025, then 1,197 and 1,192. Net change over the year is 21 fewer banks, not hundreds more. Same banks. Bigger pie. Smaller slice for the top four.
Where the $88.4 trillion actually came from
I want to know where the $88.4 trillion actually came from before I trust any story built on top of it. Interest rate notional rose $67.4 trillion in the quarter, from $135.8 trillion to $203.2 trillion, a 49.7% jump (OCC Q1 2026, p.11, Table 10). One instrument carried 76% of the entire quarter’s growth. Interest rates did the heavy lifting. FX added $18.1 trillion. Equity added $1.1 trillion. Credit added $1.6 trillion. Commodity added $0.2 trillion. Rates dwarfed everything else. By contract type, swaps carried two thirds of it: $58.3 trillion of the $88.4 trillion increase, taking swaps to 61.8% of all bank derivatives notional (Table 11, same page). One instrument, one contract type. Futures, forwards and options split most of the remaining third between them.
This is the part that should stop you. Interest rate notional exploded. Interest rate trading revenue collapsed, down 87% year over year to $1.1 billion. If a bank were putting on more directional risk and getting paid for it, revenue and notional would move together. My read is that they did not, because this was not that kind of growth. Volume without pay. That’s the tell.
I want to be precise about what the clearing data actually shows, because it is more mixed than a clean compression story. Centrally cleared interest rate notional rose from about $61.0 trillion to about $84.5 trillion this quarter, a real increase. But its SHARE of the total fell, from 44.9% to 41.6%, because uncleared bilateral notional grew even faster, from roughly $74.8 trillion to $118.7 trillion (OCC Q1 2026, p.12, Table 12). Novation compression, where one bilateral trade splits into two offsetting cleared legs, would push the cleared share UP, not down. That is not what happened. The share fell instead. So I am not going to lean on the clearing table as proof of a compression story specifically.
What the data does show is growth spread broadly across both the cleared and the uncleared book at once, not concentrated in one structure. I read that breadth, cleared and bilateral both expanding, as evidence the flow is client driven and widely distributed rather than one desk’s proprietary position. That kind of flow does not need JPMorgan or Goldman specifically. It needs a swap dealer with a balance sheet, cleared or not. More than four banks qualify for that narrower job, even if only four can run the full book.
