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Frequently asked questions
Answers to common questions about the rankings, data and methodology behind Open Market Rank.
What does Open Market Rank rank?
Open Market Rank tracks three classes: countries, currencies and cryptocurrencies. Countries are ranked by nominal GDP, currencies by broad money supply (M2), and cryptocurrencies by market capitalization.
Why aren't countries, currencies and cryptocurrencies in one ranking?
They use different measures of size. GDP measures output over a period, money supply measures an amount of money at a point in time, and market capitalization measures the current market value of an asset. Combining them would imply the measures are equivalent when they are not.
Where does the data come from?
From named external providers for economic indicators, monetary data, exchange rates and cryptocurrency market data. The source used for a figure is shown on the page itself, and the full list is on the data sources page.
How fresh is the data?
It depends on the type. Crypto prices and exchange rates update frequently, while GDP, population, money supply and wealth estimates follow the publication schedules of their source institutions. The reporting period is always shown separately from the site refresh time.
Why can indicators on the same page have different dates?
Economic indicators are published independently. A country may already have GDP data for one year while its latest population or wealth observation belongs to another. We use the latest available observation for each indicator rather than forcing them onto one artificial date.
What does M2 mean?
M2 is a broad measure of money that generally includes physical currency, transaction deposits and other relatively accessible savings balances. Exact definitions vary between monetary authorities, so the original source remains authoritative.
Can I cite Open Market Rank?
Yes. For a stable reference, use a permanent historical snapshot rather than the continuously updated latest ranking.
Are historical snapshots permanent?
Snapshots preserve previously published data without replacing it with newer values, which makes them suitable for citation and reproducible analysis.
Is there an API?
Yes. Open Market Rank provides JSON access to the latest published data and to historical snapshots, with no key and no sign-up.
What does “Previous value used” mean?
The latest refresh did not produce a usable replacement value for that field, so the most recent previously available observation is shown. It does not mean the source published the same value again.
Is Open Market Rank investment advice?
No. Open Market Rank provides data, rankings and research tools for informational purposes only. It does not provide individualized investment advice, trading recommendations or guarantees about future performance.