Wealthier countries tend to hold larger reserve tranches per person
Comparing GDP per capita (current US$) with Reserve tranche position, SDR, per capita across 187 countries, 2020–2025.
- Rank correlation
- +0.74
- Holding size constant
- +0.63
- Countries compared
- 187
- Period
- 2020–2025
What might link these
Higher GDP per capita may enable countries to accumulate more foreign reserves, including SDR tranches, as a buffer for economic stability. However, reverse causality or omitted factors like institutional quality could also play a role.
Why this is not proof of anything
This is a correlation across countries, not an experiment. It cannot show that either indicator causes the other, and both may simply follow a third thing. Reserve tranche positions are partly determined by IMF quota allocations, which are themselves influenced by GDP and population, potentially inflating the correlation.
The second figure above repeats the measurement with national population and income held constant. It is the more conservative number: a relationship that largely disappears there was mostly telling you that larger, richer countries have more of most things.
How this was measured
Both indicators were ranked across every country reporting each, and the two rankings compared — ranks rather than raw values, because a handful of very large countries can otherwise manufacture a relationship on their own. The calculation is arithmetic over figures already published on this site; the commentary above is drafted from the two indicator names and the resulting coefficients.