Within twenty-four hours, the two central banks that matter most for Japanese equity investors held their policy rates steady. The Bank of Japan kept its overnight call rate at 0.75 per cent. The Federal Reserve kept its federal funds rate at 3.50–3.75 per cent. Both decisions were expected. Neither was the story.

The story is in the dissents — and in what they reveal about the diverging trajectories of the world’s two largest bond markets, the unwinding of the yen carry trade, and why TOPIX, and Japanese financial stocks in particular, are positioned to outperform global indices through the turbulence ahead.

At the BOJ, Hajime Takata voted for an immediate hike to 1.0 per cent, arguing that the price stability target had been broadly achieved and that second-round effects from overseas price rises were creating upside risk to domestic inflation. At the Fed, Stephen Miran — the president’s own Council of Economic Advisers chair — voted for an immediate cut of 25 basis points.

Same oil shock. Opposite conclusions. To understand why, and what it means for your portfolio, you need to understand three things: what the BOJ actually said today, why the Fed is paralysed, and what Donald Trump is trying to accomplish with a war he started eight months before the midterm elections.

This blog previewed the March meeting with a single question: would the BOJ frame the oil shock as a growth drag or an inflation accelerant? The answer is now in the statement.

The critical new sentence, absent from both December and January: the BOJ now states that the impact of crude oil price rises on the outlook for underlying inflation “requires mindfulness.” This is not the language of a central bank treating oil as a temporary supply disruption. It is treating oil as something that could alter the trajectory of the variable it cares about most: underlying inflation.

Compare the three statements and the drift is unmistakable. In December, the BOJ hiked to 0.75 per cent unanimously, citing rising confidence that the wage-price mechanism would deliver 2 per cent inflation. In January, a stripped-down statement held the rate; Takata dissented for 1.0 per cent on the grounds that overseas recovery was stoking domestic inflation risk. In March, the full economic assessment returned, and it is more hawkish than either predecessor. Middle East tensions, unstable international financial markets, and sharply higher oil are now explicitly listed among the risk factors. The hiking bias is maintained word for word: the BOJ “will continue to raise the policy rate and adjust the degree of monetary easing.”

The footnotes matter as much as the text. Takata’s dissent reasoning shifted from “overseas economic recovery” (January) to “second-round effects from overseas-origin price rises” (March). He is using the oil shock to argue for faster tightening, not against it. Meanwhile, Tamura — who voted with the majority but dissented on the outlook description — pulled his inflation timeline forward. In December he placed the moment when underlying inflation would be broadly consistent with the 2 per cent target in the second half of the outlook period. In March he moved it to “from the start of FY2026 onward.” Both hawks hardened. The 8-1 headline understates the shift underneath.

For investors in Japanese financials, this is the signal that matters. The gamma in megabank earnings comes from the convexity of net interest margins to policy rate rises. Each increment widens the spread between deposits (repriced slowly) and lending (repriced quickly). At 0.75 per cent, this mechanism is already delivering record profits at MUFG, SMFG, and Mizuho. At 1.0 per cent — the level Takata is now explicitly advocating and the BOJ is gravitating toward — the margin expansion accelerates. The embedded value repricing in Japanese life insurers follows the same logic: higher JGB yields raise the present value of the spread between what insurers earn on their bond portfolios and what they owe on their liabilities. The 10-year JGB closed today at 2.258 per cent, higher than when this blog wrote about the January JGB crisis.

Normalisation is not stalling. It is accumulating justification. May 1 is a live meeting.

The Fed is stuck

The FOMC held the federal funds rate at 3.50–3.75 per cent. The Summary of Economic Projections tells a story of an institution growing less comfortable but unwilling to act. The median projection for PCE inflation in 2026 rose from 2.4 to 2.7 per cent. Core PCE rose from 2.5 to 2.7 per cent. Yet the median dot for the federal funds rate at year-end remained at 3.4 per cent — still implying two cuts this year. GDP growth was revised up. The committee is saying: inflation is higher than we expected, growth is stronger than we expected, and we still plan to cut.

This is not a coherent position. It is a committee trying to hold together.

The dot plot range for 2026 runs from 2.6 to 3.9 per cent — 130 basis points of dispersion, effectively no consensus on where policy is headed. Powell framed the oil shock as “too soon to know the scope and duration of the potential effects.” He leaves on 15 May. Takata, by contrast, framed it as a reason to hike today. One central banker says it is too early to judge. The other says it is late enough to act.

The longer-run neutral rate estimate edged up from 3.0 to 3.1 per cent. In isolation, a tenth of a point is trivial. In the context of the US-Japan spread, it is not. The terminal resting point for the federal funds rate is drifting higher at the same time as the BOJ’s terminal rate is drifting higher — but the BOJ is moving faster from a lower base. The structural compression of the spread is embedded in both central banks’ own projections.

For the carry trade, this is corrosive. The incentive to borrow in yen and lend in dollars depends on the spread remaining wide enough to compensate for currency risk. At today’s levels — the UST-JGB 10-year spread at 1.87 per cent and narrowing — the compensation is shrinking in real time. The wall of money turning inward that this blog documented in the life insurer repatriation data is not a one-off driven by the war. It is the institutional expression of a spread that no longer justifies the risk.

This is the structural bid behind Japanese financial stocks that global investors are still underweighting. Japanese institutional capital — life insurers, pension funds, regional banks — spent two decades reaching offshore for yield that domestic financial repression could not provide. That era is ending. The money is coming home, and it is flowing into JGBs and domestic equities, compressing yields at the long end while pushing up the asset prices of the institutions doing the buying. The megabanks and life insurers are both the vehicles and the beneficiaries of this repatriation.

Why Trump started a war eight months before the midterms

To understand the oil price — and therefore the BOJ’s reaction function, the Fed’s paralysis, and Bessent’s dwindling runway — you have to answer a question that most financial analysis avoids: what is the president trying to accomplish?

For the rest of the world, the answer appears obvious and damning. Polling across allied nations shows majorities blaming the United States and Israel for starting the war and creating a global price shock. Trump’s own approval rating has fallen to 35 per cent, the worst of his second term, in surveys conducted the same week both central banks met. His net approval on the economy — the issue that decides American elections — has dropped to minus 20, slightly worse than Biden’s at the equivalent point in his presidency. The midterms are on November 3. The Cook Political Report shows Democrats leading in 211 House races, Republicans in 206, with 18 toss-ups, 14 held by Republican incumbents. The historical average midterm loss for the president’s party is 28 House seats.

So why do it?

Consider the man making the decision. He is 79 years old, a billionaire several times over, serving his second and constitutionally final term as president of the United States. He does not need the money, the status, or the career advancement. He chose to initiate a military operation that cratered his own approval ratings eight months before his party faces the electorate. The immediate political downside is enormous and visible. The upside, if it exists, must therefore be correspondingly large — and, critically, must be something that only a sitting president can accomplish.

This is the analytical frame that makes the operation legible. Strip away the partisan noise and what remains is a question of legacy: what does a leader do when the only remaining currency is historical consequence? The tariffs were the preparation. The Abraham Accords were the first act. Epic Fury is the decisive move. The deal — if it comes — is the final act. What Trump is attempting is a permanent restructuring of the Middle Eastern energy and security architecture, executed in weeks rather than decades, that simultaneously breaks OPEC’s pricing power and eliminates the last major state nuclear threat. If it works, it is the most consequential American foreign policy action since Nixon’s opening to China. If it fails, it is Iraq without the occupation.

The substance of the deal would need to deliver on the three variables that determine whether any American president’s military action is judged a success or a failure by the electorate — not as a matter of ideology, but as a structural regularity that runs from Korea through Vietnam, Iraq, and Afghanistan: the cost of living, employment, and whether force was applied decisively without becoming open-ended.

On the cost of living: before Epic Fury, Brent crude was $66. The administration’s implicit promise is not merely to return oil to that level but to push it below it. This is why Iranian oil infrastructure was deliberately preserved during the strikes. Nuclear facilities, missile sites, and air defences were destroyed. Refineries, export terminals, and pipelines were not. Read as military strategy, this looks like restraint. Read as political economy, it is the opposite — it is the preservation of an asset that gives the post-war deal its value.

The deal, if it comes, would work as follows. Iran accepts permanent dismantlement of its nuclear weapons programme and its proxy network. In return, sanctions are lifted and Iranian crude re-enters the global market. At full capacity, Iran can produce roughly 4 million barrels per day. That volume, arriving at the same moment as previously sanctioned Russian crude that Bessent has already released, creates a supply glut that OPEC cannot absorb. Saudi Arabia would have to cut its own production to politically unsustainable levels to defend prices. The structural result: American energy costs fall not temporarily but permanently, because the cartel’s pricing power has been broken.

On employment: a post-sanctions Iran represents one of the largest infrastructure reconstruction opportunities in a generation. Its oil fields need modernisation. Its refining capacity needs expansion. Its pipeline network needs rebuilding. Under a bilateral framework, American engineering and energy services firms — the Bechtels, Halliburtons, and Baker Hugheses — would be positioned for preferential access. The employment effects would concentrate in the energy-producing states of the American South and Midwest, precisely the regions whose economic sentiment most directly affects the governing party’s midterm arithmetic.

On security: Iran was the last major state sponsor of Hezbollah, Hamas, and the Houthis. If the operation degraded their supply lines and the deal formalises their dismantlement, the administration gains a historically potent narrative — the elimination of a generational threat without a prolonged occupation. No nation-building. No indefinite deployment. The political resonance of this claim is well established: American voters have consistently supported the use of decisive force abroad while punishing administrations that allow military commitments to become open-ended. The pattern runs from Korea through Vietnam, Iraq, and Afghanistan.

This is why Bessent was in the Situation Room during Operation Epic Fury. The military operation was not designed independently of the economic objective. It was shaped around it: destroy the weapons programme, preserve the oil, create the leverage for a transaction that addresses all three variables simultaneously — cost of living, employment, and security — without the indefinite commitment that has historically turned American public opinion against military interventions.

The problem, and it is an acute one, is sequencing. All of these benefits are post-deal benefits. The electorate, however, is experiencing the pre-deal costs in real time: Brent above $110, rising grocery prices as energy costs pass through the supply chain, and a conflict that — to the rest of the world and to a growing share of domestic opinion — appears to have created disorder rather than resolution. The mines are still in the Strait of Hormuz. The minesweepers have not left port. Mine clearance takes weeks at minimum. Even under the most optimistic assumptions, the deal does not produce consumer-facing relief until August or September — the absolute last moment at which economic sentiment can shift before the November vote. If the window closes before the deal materialises, the economic pain will have hardened into precisely the kind of incumbent-rejection pattern that political scientists have documented in every modern midterm held during periods of elevated inflation.

This is Bessent’s actual job: keeping the financial system stable long enough for the deal window to remain open. His binding constraint, as this blog has argued, is the 10-year Treasury yield. If yields blow out before the deal closes, the economic pain hardens into the kind of resentment that drives midterm turnout against the incumbent. The SEP just told him the Fed is not going to help as much as he hoped — two cuts are still projected, but inflation revisions make even those uncertain. The BOJ just told him Japanese yield convergence will continue compressing carry trade incentives and pulling capital back to Tokyo. Neither central bank is giving him room.

This is where the legacy framing changes the probability weighting. If the motivation were purely electoral, the administration would be looking for an exit — any exit — that brings oil down before November. But if the motivation is historical consequence, the calculus inverts. Trump will not abandon the deal to save the House. He will sacrifice the House to get the deal. He cannot run again in 2028. The executive order machinery, the tariff authority under IEEPA, the DOGE apparatus — none of it requires congressional approval. Losing the legislature would constrain appropriations and enable investigations, but it would not stop the deal, the tariffs, or the reshaping of the Fed. A lame duck in Congress does not mean a lame duck in practice — not with this administration’s theory of executive power.

This makes Bessent’s position more precarious, not less. He is not managing the runway to an election. He is managing the runway to a transaction whose timeline is set by the president’s ambition, not the electoral calendar. If the deal takes longer than November, so be it — from the White House’s perspective. From Bessent’s perspective, the financial system still has to hold.

The Miran dissent is the tell that the administration’s preference is legible even inside the FOMC. The president’s own appointee voted to cut rates while core PCE is running at 3.0 per cent. That is not an economist’s judgement. It is a political signal: the administration wants easier money, either because it still believes it can engineer the deal-plus-rate-cut combination that saves the midterms, or because it has already moved past the midterms entirely.

The asymmetry is the trade

For global and Japanese investors positioned in TOPIX — and in Japanese bank and life insurer stocks specifically — both American scenarios lead to the same place, though by different routes.

If the deal materialises and oil collapses, global risk appetite recovers, the yen strengthens on carry trade unwind, and Japanese equities rally on the combination of lower energy costs and continued domestic rate normalisation. The BOJ does not stop hiking because oil falls — it hikes because wage-price dynamics remain intact and the oil shock, while it lasted, pushed inflation expectations higher. Bank earnings gamma compounds. Life insurer embedded values expand.

If the deal fails or slips past the midterm window, oil stays elevated, the BOJ’s normalisation accelerates — the Takata logic, oil as an inflation accelerant, moves from dissent to consensus — JGB yields rise further, and the structural repricing of Japanese financial assets intensifies. The carry trade unwind deepens. The spread compresses. The repatriation flow that began in late 2025 becomes a structural reallocation.

The rest of the world is hostage to the deal timeline. Japanese financials are not. Their earnings power comes from a domestic interest rate cycle that the BOJ confirmed today is intact, regardless of what happens in the Strait of Hormuz or the halls of the US Congress. The path to outperformance differs depending on whether Trump gets his transaction. The outperformance itself does not.

The BOJ told you today that it has a direction. The Fed told you it has a committee that cannot agree. For the patient investor, that clarity is worth more than a hundred basis points of carry.

This article reflects my own reading of publicly available information and is not investment advice.

— Gyokuro