Why a policy-rate table cannot represent every monetary stance

International policy tables often place central banks in rows and a single interest rate in each column. That format can be useful when the instruments are comparable, but it becomes misleading when an exchange-rate-centered framework is forced into the same field. Singapore's monetary policy cannot be represented adequately by selecting a domestic market rate and labeling it the equivalent of the Federal Reserve's target range or the ECB's deposit facility rate.

Even among interest-rate frameworks, the selected number needs an exact definition. A target range, an administered remuneration rate, and an observed overnight market rate are related objects rather than interchangeable observations. The policy stance also depends on expected inflation, financial conditions, balance-sheet instruments, and the economic environment against which the decision is made.

The comparison below uses specific official framework explanations and historical decisions. The dated rate values illustrate instrument definitions; they are not a current monetary-policy dashboard. The aim is to identify a defensible common analytical structure without inventing a numerical equivalence among instruments that operate differently.

The Federal Reserve's January 29, 2025 implementation note directed operations to maintain the federal funds rate within a target range of 4.25 to 4.50 percent. It separately set the rate paid on reserve balances at 4.4 percent and specified other operating terms. The range and the reserve remuneration rate therefore were different numbers within the same implementation framework. Federal Reserve, implementation note, January 29, 2025.

A table reporting the range midpoint would show 4.375 percent. A table reporting the upper bound would show 4.50 percent. Neither is the effective federal funds rate observed in market transactions, and neither should be silently substituted for the reserve remuneration rate. A comparison must state which series it uses and why that series represents the intended question.

This is not merely a formatting concern. A change in an operating spread can affect the relationship between administered and market rates without representing an equivalent change in the announced target range. Analysts should distinguish the policy decision, implementation arrangements, and observed transmission before comparing movements over time.

In its June 5, 2025 decision, the ECB explicitly identified the deposit facility rate as the rate through which the Governing Council steered its monetary stance. The decision lowered it to 2.00 percent from June 11, while the main refinancing and marginal lending rates became 2.15 and 2.40 percent. Selecting the main refinancing rate solely because a dataset calls it the policy rate would miss that stated operational distinction. ECB, monetary policy decisions, June 5, 2025.

The release also discussed balance-sheet portfolios and its assessment of inflation and transmission. Those elements provide context for the decision, but they do not imply that every instrument can be added to the rate change using a fixed conversion factor. An asset runoff, a liquidity operation, and a deposit-rate adjustment can have different effects across markets and horizons.

A comparison with the Federal Reserve should consequently align dates and instrument concepts before interpreting the difference. A historical value from January and another from June do not form a simultaneous cross-country ranking. The two cases here demonstrate the documentation needed to construct such a comparison, rather than supplying the ranking itself.

MAS identifies the Singapore dollar nominal effective exchange rate, or S$NEER, as its monetary-policy intermediate target. It manages the currency against a trade-weighted basket within a policy band and can adjust the band's slope, center, or width. The framework is intended to support medium-term price stability. It is not a bilateral peg to the U.S. dollar. MAS, monetary-policy framework and rationale, section 2.

MAS's implementation explanation states that foreign-exchange operations keep the S$NEER within the band. It also explains that precise basket weights and policy-band parameters are not publicly disclosed, while qualitative changes in settings are communicated. A research table should preserve that information boundary rather than fill it with an invented interest-rate equivalent or an inferred exact slope. MAS, implementation and disclosure, section 4.

Domestic interest rates remain economically important in Singapore. They affect financing and saving decisions. However, a market overnight rate is an outcome of financial conditions and expectations, not an independently announced MAS policy target comparable to the Federal Reserve's range. Treating it as the target can attribute a global interest-rate movement to a local policy decision that did not occur.

The appropriate comparison therefore retains the instrument difference. For the United States and euro area, it records the selected policy-rate settings and operating framework. For Singapore, it records the announced changes in exchange-rate-band parameters and the stated rationale, with market interest rates shown separately when relevant.

Consider two hypothetical economies using interest-rate instruments. Economy A has a one-year nominal rate of five percent and expected inflation of two percent. Economy B has a nominal rate of three percent and expected inflation of one percent. Assuming the rates and expectations cover the same horizon, the exact expected real rates are calculated as one plus the nominal rate divided by one plus expected inflation, less one.

The third row lowers A's nominal rate by twenty-five basis points, but expected inflation falls by one percentage point. Its expected real rate rises from approximately 2.94 to 3.71 percent. A nominal cut therefore need not produce a lower expected real rate when expectations change. The calculation is an accounting comparison of stated assumptions, not an estimate of the causal effect of a central-bank announcement.

A policy stance assessment would also compare the real rate with an appropriate equilibrium benchmark. That benchmark is uncertain and can change. A real rate of three percent cannot be labeled equally restrictive in every economy or period without considering saving, investment, risk, productivity, and other determinants. A table should not convert an uncertain benchmark into a false precision ranking.

The horizon and borrower matter as well. A short-term policy setting differs from a long-term corporate borrowing rate. Credit risk, collateral, fees, and maturity affect the latter. Expected consumer inflation may be useful for a household purchasing-power comparison, while a firm's relevant revenues and input prices may follow a different path. The analytical objective determines which real-rate concept is appropriate.

Consider a hypothetical imported product priced in a common foreign currency. Its foreign price rises eight percent. If the domestic currency appreciates four percent measured as foreign currency purchasable per domestic currency unit, the local-currency price factor is 1.08 divided by 1.04. The domestic price rises approximately 3.85 percent rather than eight percent, assuming complete pass-through, unchanged margins, and no other costs.

If the product represents forty percent of a fixed consumer basket and all other prices remain unchanged, a simple fixed-weight calculation gives a contribution of approximately 1.54 percentage points to the basket's price change. That is an illustration using an assumed product share. It is not a forecast for Singapore, an estimate of its import share in the CPI, or a claim that the S$NEER maps one for one into a single importer's exchange rate.

Without the appreciation, the same assumed foreign price shock contributes 3.20 percentage points in this simplified basket. The difference is approximately 1.66 percentage points. Actual consumer-price effects can be delayed or incomplete because of invoicing currencies, hedging, local distribution costs, contracts, substitution, and margins. A trade-weighted exchange-rate index also differs from the currency composition of each firm's purchases.

The example cannot be converted into an equivalent number of basis points on an interest-rate target without an economic model. Interest and exchange-rate changes affect demand, prices, balance sheets, and expectations through overlapping channels. Their relative effects depend on the shock, horizon, and structure of the economy. A universal conversion would conceal those conditions.

A central bank can leave a nominal setting unchanged while economic conditions alter its effect. Lower expected inflation raises a real rate at an unchanged nominal rate. A strengthening currency can change import costs even without an announced band adjustment. Wider credit spreads can tighten private financing while the policy rate is stable. These developments belong in a financial-conditions assessment, but should not all be described as deliberate policy decisions.

Conversely, a policy adjustment may be smaller than markets expected. A nominal cut can then accompany rising market yields or currency appreciation because expectations revise relative to the anticipated path. Interpreting the immediate market movement requires a comparison with expectations, rather than the sign of the announced change alone.

For Singapore, an observed bilateral exchange-rate movement can occur while the trade-weighted currency remains within the same policy band. A fall against one currency does not establish a deliberate easing of the S$NEER framework. The basket, band, and market expectations need to be considered together, while respecting the limits of publicly disclosed parameters.

For the euro area and the United States, a balance-sheet change can affect liquidity and term premiums alongside rate policy. It should be recorded with its stated objective and operational terms. Calling every increase in central-bank assets an identical form of monetary easing would ignore differences between liquidity support, asset purchases, valuation movements, and other balance-sheet items.

A useful dashboard would begin with the regime and objective, identify the intermediate or operating target, and record the decision date. It would then distinguish the instrument setting from market outcomes. A range should remain a range unless a transformation such as its midpoint is explicitly labeled. A qualitative band adjustment should remain qualitative where no precise parameter is disclosed.

The next layer would record expected inflation over a matched horizon, relevant market funding rates, exchange-rate developments, and balance-sheet policies. Those observations describe the channels through which the setting affects the economy. They do not remove the need for a country-specific model when making a claim about relative restrictiveness or the expected effects of a change.

Information vintages should also be preserved. A policy announcement responds to information available at that time. Revising a historical inflation or output series later does not mean the decision was made with the revised figures. An event study and an ex-post macroeconomic comparison can use different datasets, but the choice must be explicit.

For firms operating across the three economies, the practical exposure is contractual. The relevant currency of sales and purchases, the funding benchmark, repricing dates, and hedging arrangements determine how policy and market movements reach cash flow. A national policy-rate table can provide a starting reference for some of those questions. It cannot substitute for the instrument and exposure map required to answer them.

The common comparison is therefore an analytical structure, not a forced common number. Official decisions establish which instruments changed and why. Market and inflation evidence describe the conditions around them. Keeping those layers visible allows a rigorous comparison of monetary stance while preserving the economic differences among the Federal Reserve, the ECB, and MAS.

See monetary transmission under different financial structures for contractual repricing, and trading hubs and external exposure for the distinction between gross openness and domestic production.