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Dimon Warns: Market Shock Risk Rising | Analysis by Brian Moineau

Posted on by Brian Moineau

TL;DR

  • Jamie Dimon, JPMorgan’s CEO, has warned since at least the 2023 shareholder letter that higher-for-longer rates, war risk, and fiscal deficits could hit assets; the deeper fuse is U.S. debt rollover colliding with persistent Treasury supply and finite balance sheets. [1][2]
  • Even with June CPI around 3.5% year over year, the 10-year Treasury hovered near 4.6% in mid-July 2026; that level sits well above the government’s current average interest rate on outstanding debt, implying net interest keeps trending higher as low-coupon notes reset. [3][4][5]
  • The 2022 UK gilts shock showed how a long-end spike (30-year yields jumping roughly 130–140 bps in days) can trigger forced selling; the U.S. won’t replay LDI, but heavy funding needs plus convexity and dealer limits can rhyme. [6]

What the source said

In the 2023 JPMorgan shareholder letter, Jamie Dimon flagged persistent inflation, geopolitical conflicts (notably Russia–Ukraine and Middle East hotspots), and fiscal deficits as reasons rates could stay high and markets could see a shock; he argued investors should not assume a smooth disinflation glide path like the mid-1980s. He linked these risks to potential pressure on both equities and bonds if term premia rise and cash flows get discounted at higher rates. He framed bank operating conditions as strong in 2023–2024 but warned they can change quickly if funding costs or credit losses climb. [1]

Why it matters

  • Primary dealers in New York, U.S. money market funds, and foreign reserve managers in places like Tokyo and Beijing finance the Treasury’s deficits, while retirees on Social Security and Medicare, and S&P 500 firms rolling debt, depend on the cost of that funding. If “vigilantes” demand more term premium, the 10-year at roughly 4.55%–4.60% in mid-July 2026 can lift mortgage rates, capex hurdles, and equity discount rates even after a soft CPI headline. [3][4]

  • Traditional 60/40 allocators, banks’ AFS/HTM books, and long-duration ETFs such as iShares TLT (launched 2002) face path risk that inflation prints alone won’t capture; the UK’s 2022 episode showed 30-year gilts spiking about 130–140 bps within days and forcing deleveraging, while TLT itself lost roughly 31% in calendar 2022 during the U.S. rate shock. [6][7]

Original analysis

Dimon’s “shock” setup rests on rates, geopolitics, and deficits. The common reply says: core inflation is easing, so yields drift lower; flare-ups are priced; deficits matter later. I disagree because the plumbing points to supply, rollover, and balance-sheet constraints that act now.

Contrarian read

  • Consensus: Softer CPI = lower yields = duration relief.
  • Counter: Supply and rollover are repricing duration irrespective of CPI. June CPI ran near 3.5% y/y while the 10-year sat around 4.6%, and recent Treasury refunding guidance emphasized steady coupon auction sizes over “at least the next several quarters,” a stance that can buoy term premia when dealer capacity is finite. [3][4][8]

Back-of-envelope calculation (rollover wedge)

  • Facts:
    • Debt held by the public was roughly $29.7 trillion around late 2025, per Treasury’s Debt to the Penny dataset. [9]
    • The weighted average maturity (WAM) of marketable debt was about 70.8 months (≈5.9 years) as of October 31, 2024. [8]
    • The average interest rate on outstanding Treasury marketable debt ran near 3.4% in 2025–2026 per Treasury’s dataset. [5]
    • The 10-year yield in mid-July 2026 printed around 4.55%–4.60%. [4]
  • Mechanics:
    • If WAM ≈ 70.8 months, about 12/70.8 ≈ 17% of the portfolio resets per year.
    • 17% × $29.7T ≈ $5.0T rolling in the next 12 months.
    • Rate gap vs. legacy average cost: 4.60% − 3.40% ≈ 1.20 percentage points.
    • Extra annualized interest from this year’s roll: 1.20% × $5.0T ≈ $60B.
  • Interpretation: That is just year one; as more low-coupon notes roll in 2027–2028, the wedge compounds if the 10-year hangs near 4.6%, regardless of monthly CPI noise. [4][5][9]

Historical analogue: UK gilts, September–October 2022

  • The “mini-budget” shock was not about surprise inflation; it was about sudden term-premium repricing to fund deficits and hedge leverage, with 30-year yields jumping roughly 130–140 bps in a few days, forcing LDI selling and a Bank of England liquidity backstop. The U.S. has deeper markets and no LDI ubiquity, yet persistent supply plus convexity and dealer VAR limits can still pressure the long end quickly. [6]

A simple 2x2: supply vs. risk capacity

  • High supply + thin risk capacity (e.g., big refundings during bank VAR constraints): risk of sharp yield spikes and auction tails.
  • High supply + ample risk capacity (e.g., strong dealer balance sheets and risk-on credit): gradual bear steepening.
  • Low supply + thin risk capacity: choppy range trading with occasional squeezes; term premium can still stay positive.
  • Low supply + ample risk capacity: benign decline in long-end yields; this is the cyclical “soft landing” case and requires deficits to narrow or issuance to skew short.

Named-stakeholder breakdown

  • U.S. Treasury: Recent Quarterly Refunding materials and TBAC slides signal maintaining coupon auction sizes and a stable WAM, which keeps a steady duration pipe flowing into a market where dealers must warehouse risk. [8]
  • JPMorgan, Goldman Sachs, and Bank of America: Trading desks benefit from volatility, but a violent long-end selloff stresses client collateral, increases margin calls, and can dampen primary issuance in New York and London.
  • 60/40 allocators and long-duration ETFs (e.g., TLT): If the 10-year revisits 5% without a growth scare, equity multiples compress while bond NAVs fall—hurting both legs at once; the 2022 TLT drawdown of about −31% shows the convexity bite. [4][7]

One more inconvenient anchor: deficits

  • The CBO’s long-term projections show debt held by the public reaching roughly 116% of GDP by 2034 with primary deficits persisting, implying sustained issuance and a positive term premium absent policy changes; this fiscal backdrop amplifies the rollover wedge described above. [2]

What others are missing

Most coverage centers on “inflation vs. the Fed,” but the under-covered angle is the portfolio’s effective reset speed—call it WANRR, the weighted average next repricing rate. Bills and FRNs shorten the government’s true interest-rate sensitivity; TBAC slides show bills plus FRNs comprising roughly the high-30s percent of marketable debt in 2024, far quicker to reprice than 7–10 year notes. That accelerates the pass-through from a 10-year near 4.6% to the average interest rate, which Treasury’s dataset shows climbing as legacy sub-2% coupons from 2020–2021 roll away. [8][4][5][3]

What to watch next

  1. By October 31, 2026, the 10-year Treasury yield (FRED series DGS10) records a weekly average at or above 5.00% for at least one week, indicating term premium and supply pressure overcame benign CPI prints. [4]

  2. By December 31, 2026, at least one 30-year Treasury bond auction (new issue or reopening) tails by 3.0 basis points or more versus the when-issued yield at the 1:00 p.m. ET deadline, signaling constrained balance-sheet capacity at primary issuance. [10]

  3. By March 31, 2027, iShares TLT posts a total return of −10% or worse from the July 15, 2026 close to that date (using NAV total return on the fund’s page), consistent with duration pain despite moderating CPI. [7]

Sources

[1] JPMorgan Chase 2023 Shareholder Letter (Jamie Dimon) — outlines CEO views on higher rates, geopolitics, and market risk, anchoring the “shock” narrative.

[2] Congressional Budget Office — Long-Term Budget Projections — provides deficit and debt-to-GDP trajectories that inform issuance and term-premium pressure.

[3] U.S. Bureau of Labor Statistics — Consumer Price Index — supplies CPI data used for the June year-over-year reading and inflation context.

[4] Federal Reserve Bank of St. Louis (FRED) — 10-Year Treasury Constant Maturity (DGS10) — benchmark for long-end yields and the 4.6% reference point.

[5] U.S. Treasury FiscalData — Average Interest Rates on U.S. Treasury Securities — tracks the average coupon cost on outstanding debt to compare against current yields.

[6] Bank of England — Financial Stability Report, December 2022 — documents the UK gilt crisis mechanics, LDI deleveraging, and yield spike magnitudes.

[7] iShares — TLT (20+ Year Treasury Bond ETF) — provides historical performance and duration metrics to illustrate convexity and drawdown risk.

[8] U.S. Treasury — Treasury Borrowing Advisory Committee (TBAC) Q4 2024 Presentation — shows WAM, issuance mix, and debt composition (bills/FRNs vs. coupons).

[9] U.S. Treasury FiscalData — Debt to the Penny — gives levels for debt held by the public to size the rollover base.

[10] U.S. Treasury — Auction Query (official results) — verifies auction tails and bid metrics for 30-year bond sales.

China Retreats: Trouble for U.S | Analysis by Brian Moineau

Posted on by Brian Moineau

Why China (and other foreign buyers) might be stepping back from U.S. Treasuries — and why it matters

It started as a whisper and has the markets leaning forward: reports say Beijing has told its banks to cut back on buying U.S. Treasuries. That’s not a casual portfolio shuffle — it’s a shot across the bow of a decades‑long relationship in which the world piled cash into the dollar and U.S. debt. If foreign demand softens, it changes how the U.S. finances itself, how yields move, and how policymakers think about risk.

Below I unpack the four reasons driving the reported pullback, why the reaction so far has been measured, and what to watch next.

The short, punchy version

  • Foreign holdings of U.S. Treasuries have been declining in recent months, and China’s reserves have fallen notably year‑over‑year.
  • Four main forces appear to be nudging China and others away: geopolitics and sanctions risk, U.S. fiscal trajectory, policy unpredictability, and better alternatives abroad.
  • A true “dollar break” would be dramatic — but incremental shifts can still push yields higher, the dollar lower, and borrowing costs up for Americans.
  • Watch official reserve flows, Japanese and European yields, and any formal guidance from Beijing or large sovereign custodians.

A quick scene setter

For decades the U.S. Treasury market has been the global safe harbor: deep, liquid, and reliable. That status rests on a mix of economic fundamentals and trust in U.S. institutions. But that foundation isn’t invulnerable. Since at least 2018, China’s Treasury holdings have trended down. Recent reports — including an Axios piece highlighting “4 reasons” investors may retreat — say Beijing has asked banks to limit Treasury exposure. Treasury International Capital (TIC) and monthly flow data show foreign net purchases ebbing and occasional outright reductions from major holders like China and Japan. (axios.com)

The four big reasons behind the pullback

  1. Geopolitical and sanction risk
  • The U.S. has weaponized financial channels in recent geopolitical actions (for example, freezing some Russian reserves in 2022). That sets a precedent: reserves parked in dollar assets could be subject to policy actions. For sovereigns that see strategic competition with Washington, that is a non‑trivial risk. Investors price the possibility that access or liquidity might be constrained during political crises. (axios.com)
  1. Rising U.S. deficits and debt dynamics
  • Larger deficits mean more new Treasury issuance. That raises questions about who will absorb supply and whether yields must rise to attract buyers. Persistent fiscal gaps can make some reserve managers uneasy about long-term real returns and currency dilution risk. News coverage and Treasury data show growing U.S. issuance and investor sensitivity to fiscal signals. (cmegroup.com)
  1. Policy unpredictability and political risk
  • Sudden policy moves — tariffs, trade brinkmanship, or concerns about a politicized Fed — create uncertainty for investors. When a government’s policy environment feels unstable, reserve managers may prefer to diversify into other currencies or assets perceived as less exposed to political swings. Axios flagged policy unpredictability as a key motive in recent reports. (axios.com)
  1. Attractive alternatives and portfolio diversification
  • Other safe assets (or yield opportunities) have become more attractive. Japan, in particular, has offered periods of higher yields, and other markets or assets (corporates, agencies, gold) have drawn flows. Central banks and bank portfolios are actively optimizing risk, liquidity, and yield — not just clinging to the dollar by default. Data from TIC and market reports show net shifts toward corporate and agency paper at times. (cmegroup.com)

Why markets haven't panicked (yet)

  • Scale matters. Even a sizable reduction by China would still leave it among the largest holders — and global Treasuries remain the deepest, most liquid bond market on earth. A true exodus would require coordinated moves by many holders and a large, rapid reduction in demand. Experts caution that such a breakdown would be dramatic and visible across currencies, interest rates, and capital flows — and we haven’t seen that. (axios.com)

  • Substitution vs. sale. Some flows are about slowing new purchases or reallocating new reserves — not wholesale dumping. That nuance matters: gradual diversification increases yields slowly and predictably; sudden selling spikes volatility.

  • Domestic demand and market structure. U.S. banks, mutual funds, and pensions absorb a lot of supply. Large, liquid domestic demand reservoirs blunt the impact of lower foreign purchases.

The likely near-term consequences

  • Slight upward pressure on U.S. yields: reduced foreign buying means the U.S. may need to offer higher yields to clear markets, all else equal.
  • A softer dollar: lower foreign demand for Treasuries often accompanies less dollar demand. That can help exporters, hurt importers, and change inflation dynamics.
  • Policy second-guessing: Treasury and Fed officials will be watching flows; perceptions of fiscal stress can feed into rate and funding debates.
  • Increased attention on reserve composition: expect more diversification (gold, other sovereign bonds, FX baskets) from central banks that see political or concentration risk.

What to watch next (fast signals)

  • Monthly TIC and Treasury holdings releases for major holders (China, Japan, UK, offshore custodial accounts).
  • Moves in 10‑year Treasury yield and net foreign purchases in the TIC flows.
  • Statements or rules from China’s state banks and the People’s Bank of China about reserve allocation.
  • Relative yields in Japan and Europe — attractive alternatives could accelerate reallocation.
  • FX flows and dollar index moves.

Different ways to read this moment

  • Defensive view: This is pragmatic reserve management. China is diversifying to reduce concentration and geopolitical risk — not trying to “break” the dollar. A gradual shift is manageable and expected. (cmegroup.com)

  • Structural risk view: Repeated politicization of finance and rising global tensions undermine the implicit guarantees that made dollar assets the unquestioned safe haven. Over time, this could erode the “exorbitant privilege” of the U.S. — raising capital costs and geopolitical friction. (wsj.com)

My take

We’re seeing a careful rebalancing, not a sudden divorce. Reports that China has told banks to limit new Treasury purchases are meaningful: they reflect a smarter, risk‑aware strategy by reserve managers facing geopolitical uncertainty and a crowded U.S. bond market. But the dollar and Treasuries have considerable structural advantages that aren’t going away overnight. The real risk is complacency — if U.S. fiscal policy and political volatility intensify, what’s now a managed reallocation could become a more disruptive trend.

Final thoughts

Treat this as a warning light, not an emergency siren. Investors, policymakers, and citizens should watch flows, yields, and diplomatic signals. If foreign buyers keep nudging toward diversity, the United States will pay a little more to borrow — and the broader global financial order will slowly adapt. That’s manageable, but it’s a structural shift worth tracking.

Sources