In 2022 the Fed tightened policy while the Bank of Japan retained its negative-rate framework. That contrast is a historical example of monetary-policy divergence, rather than a current description or proof that one factor caused a particular USD/JPY move. The BoJ ended its negative-rate policy in March 2024. This article shows how to compare the Fed, ECB and BoJ using dated policy information.

Compare institutions and instruments

Relative monetary policy is one input to an exchange-rate analysis. Compare the instrument, current setting and expected path on both sides of the pair, while considering inflation, growth, risk and market pricing. A rate differential alone cannot establish a currency trend.

Divergence describes differing policy settings or paths. It is context, not an exchange-rate formula. The FOMC has 12 voting members, with nonvoting Reserve Bank presidents also participating; the ECB Governing Council handles monetary policy and other tasks; the BoJ Policy Board has nine members. Their decisions are not individual chair forecasts.

Compare named instruments: Fed’s target range for the overnight federal funds rate; ECB’s overnight deposit-facility rate, separately from weekly refinancing and overnight marginal lending; BoJ’s guideline for the uncollateralized overnight call rate. These are not identical contracts. A carry trade also depends on actual funding, investment, currency and hedging terms, rather than a policy gap alone.

Keep a forecast or market-implied measure with its source and timestamp. Such measures can differ and incorporate assumptions or risk premia; they are not proof every participant expected the same outcome. A change in the policy path can influence currency pricing, alongside other information. Forward guidance describes intentions based on an assessment: retain its conditions rather than turning a phrase into an unconditional rate promise.

Which banks actually matter

Start with the authorities relevant to both currencies and the instruments being compared. This list is a practical map, not a ranking of all markets or an exhaustive list for every pair:

  • Fed / USD: FOMC target range, implementation and communications. See the Fed decision.
  • ECB / EUR: Governing Council decisions and the distinct deposit, refinancing and marginal lending rates. See ECB decisions.
  • BoJ / JPY: overnight guideline and operations. Negative-rate policy ended in March 2024, a historical date rather than a current setting. See BoJ policy.
  • BoE / GBP: compare the decision, individual proposals and assessment.
  • SNB / CHF and BoC / CAD: retain each institution’s own instrument and calendar. Oil and risk conditions are contextual factors, not permanent CHF or CAD direction rules.

Meeting frequencies differ. The SNB conducts its regular assessments in March, June, September and December; the BoC publishes eight scheduled policy-rate dates. Use each bank’s official calendar and identify the statement, forecasts and conference separately instead of applying one eight-meeting rule to every institution.

Short and long maturities can point different ways

A headline saying “higher rates” needs context: which instrument, maturity and market? Compare two maturities on one chart.

Scroll sideways to see the full diagram

Short and long maturities can point different waysHypothetical market A: one year 4%, ten years 3%; market B: one year 3%, ten years 4%. Common scale from 2 to 5%. A minus B is plus one percentage point at one year and minus one at ten years. Lines only connect the two anchors.The difference changes sign with maturityHypothetical zero-coupon yields A / B2%3%4%5%A: 4%A: 3%B: 3%B: 4%1 year10 yearsA − B at 1 year: +1 ppA − B at 10 years: −1 ppRecord maturity before comparing.
Our own simultaneous data for two invented markets A/B. We compare nominal zero-coupon bond yields in each market's currency at matching maturities and an assumed matching credit quality. These are debt-market yields, not current central-bank policy rates. Lines only connect the two known points; they do not estimate intermediate values. Costs are excluded and no currency-converted return is calculated. The ECB explains yield curves as a relationship between market rates and remaining debt maturity. Our markets and numbers are invented.
A higher one-year yield need not mean a higher ten-year yield.

Do not subtract A's one-year yield from B's ten-year yield when comparing the same horizon. Neither difference alone is a Forex position's return. A current central-bank policy rate should not be extended across every maturity.

A cut can be smaller than expected

All numbers in this exercise are hypothetical. Choose a declared comparison convention: Fed target-range midpoint minus ECB deposit rate. With Fed 4.25–4.50% and ECB 3.00%, midpoint is 4.375% and gap 137.5 basis points. This is an auxiliary policy comparison, not your deposit return or a broker’s swap.

The assigned forecast cuts both Fed bounds by 50 basis points to 3.75–4.00%, midpoint 3.875% and gap 87.5 basis points. Our actual model decision cuts only 25, to 4.00–4.25%, midpoint 4.125% and gap 112.5. The gap is 25 basis points below its old value but 25 above forecast. This is a smaller cut, not a hike, and the forecast is one scenario rather than a complete market consensus.

Now hold the Fed midpoint at 4.125% and reduce the ECB deposit rate from 3.00% to 2.75%. The auxiliary gap rises from 112.5 to 137.5 basis points. The other currency’s policy changes the comparison, without determining EUR/USD or a realized carry return. Risk and other simultaneous information remain relevant.

The most common misconceptions

Announcement and effective dates are different fields. In another invented model, bank F’s midpoint is 4.25% and bank E’s deposit rate 3.00%, gap 125 basis points. F announces 4.00% effective D+1; E announces 2.75% effective D+6. Before D+1 the applicable gap is 125; during D+1 through D+5 it is 100; from D+6 it is 125 again. Substituting both future levels immediately misses the intermediate period.

The ECB rate table labels effective dates explicitly. The teaching timeline is not an actual calendar or an arbitrage: neither central-bank indicator is necessarily available as your funding or investment rate, and market prices may reflect announced changes before they take effect.

A pair contains two currencies, so compare both policy settings. A change in expected Fed policy can affect a euro-dollar view even if ECB policy is unchanged. The pair is not literally the difference between two policies, and other price drivers remain relevant.

Keep the information sequence in a historical review. Fed minutes of regular meetings are normally published three weeks after the decision; BoJ separately schedules Summary of Opinions and minutes. A later document was not available at the earlier event. Likewise, short-window spreads and price direction require actual observations; divergence is not guaranteed to produce a lasting trend after an initial move.

Three actions to take this week

  1. Build an explicit table. For each relevant institution record instrument, previous/announced/applicable level, effective date, forecast source/time and next event. Name any midpoint convention.
  2. Investigate a contrast. Calculate changes versus previous settings and forecasts separately. Compare appropriate maturities and the other currency; a contrast is a hypothesis, not a guaranteed trend.
  3. Preserve chronology. Check current official calendars, including additional meetings, and update after new material. Keep later minutes out of earlier decisions. See fundamental analysis for the wider context.