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WFN QUICK BRIEF · UNDER 1 MIN
The short version
MODE 2 OF 2
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The SDR interest rate uses representative short-term yields in the currencies in the SDR basket, weighted under the IMF’s methodology. The IMF determines it weekly. The exchange value of the SDR is calculated separately from the value of fixed amounts of the basket currencies at their exchange rates. IMF · SDR interest rate calculation ↗IMF · SDR valuation ↗
Keep the units explicit
A quote of 3% is an interest rate. A quote of USD 1.30 per SDR is an exchange value. For an illustrative charge, a 3% annual rate applied to SDR 100,000 gives SDR 3,000 on a simple annualized basis. A dollar conversion is a separate step, and an actual IMF charge may follow its own spread, period and rules.
Capture the effective date
In a spreadsheet, keep an effective week for the rate, a valuation date for the conversion and a separate field for the relevant product or facility terms. That lets a reviewer explain whether a dollar amount changed because of the rate, the currency conversion or the amount of SDRs outstanding.
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01 · VERIFIED RECORD
Read the two calculations
The SDR interest rate uses representative short-term yields in the currencies in the SDR basket, weighted under the IMF’s methodology. The IMF determines it weekly. The exchange value of the SDR is calculated separately from the value of fixed amounts of the basket currencies at their exchange rates. IMF · SDR interest rate calculation ↗IMF · SDR valuation ↗
02 · WFN EDITORIAL ANALYSIS
Keep the units explicit
A quote of 3% is an interest rate. A quote of USD 1.30 per SDR is an exchange value. For an illustrative charge, a 3% annual rate applied to SDR 100,000 gives SDR 3,000 on a simple annualized basis. A dollar conversion is a separate step, and an actual IMF charge may follow its own spread, period and rules.
03 · REVIEW POINTS
Capture the effective date
In a spreadsheet, keep an effective week for the rate, a valuation date for the conversion and a separate field for the relevant product or facility terms. That lets a reviewer explain whether a dollar amount changed because of the rate, the currency conversion or the amount of SDRs outstanding.
Original WFN vector illustrationWFN · 9 November 2026
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WFN STORY COMPASS
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Editorial noteSource-based explanation with original WFN analysis. Historical records retain their dates; numerical examples are illustrative. The original vector illustration is conceptual and is not documentary evidence.
WFN REALITY LEDGER
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Primary-source explainer
Primary-source explainer
Primary record / reference periodIMF · SDR interest rate calculation
