What do crypto market cap and fully diluted valuation measure?

Definition

Market capitalization is a price multiplied by a supply: the last traded price of a token times the number of units counted as circulating. Fully diluted valuation, or FDV, is the theoretical market capitalization if the entirety of a token's supply were circulating at today's price, as CoinGecko's glossary defines it. The practical denominator must therefore be named rather than assumed: providers may use a protocol's stated maximum supply, while an uncapped asset requires an explicitly stated total-supply snapshot or no defensible FDV at all. In traditional equity markets the share count comes from a legal register, so capitalization is comparatively firm. In crypto, the denominator is an editorial judgment: someone must decide which locked, staked, bridged, burned, lost or foundation-held units count as circulating. Neither figure is money anyone holds — both are what one marginal price implies if it applied to every counted unit at once, which no market allows.

How it works

The circulating-supply input is assembled, not observed. Data aggregators query project teams, read token contracts, track known treasury and team addresses and subtract balances they classify as locked or unvested; CoinGecko’s published methodology, for example, describes computing circulating supply by deducting locked balances from total supply. Two aggregators applying different exclusion rules to the same token can publish materially different market caps at the same instant, with the same price.

FDV replaces that judged circulating figure with a stated fully diluted denominator. Where a protocol fixes a maximum supply, that maximum is the clearest input. Where no maximum exists, a provider may expose a total-supply snapshot, but that is not a terminal dilution estimate and must be labelled as such; if the denominator cannot be reproduced, the honest result is to withhold the FDV. For a token with most units already issued, market cap and FDV sit close together. For a token with a small float and a long emission or unlock schedule, FDV can be a large multiple of market cap. The gap is a disclosure of potential future supply relative to today's float, not a valuation of it: FDV assumes today's price would survive the arrival of every counted unit, which the price formed on today's thin float cannot promise.

Both figures inherit the weaknesses of the price input as well. The multiplier is usually a last trade or an index of venue prices for a small quantity, so a token with shallow depth can print a large capitalization that no seller could realize. This is why a token’s market cap can exceed the value that could actually be withdrawn from its markets, and why capitalization moves one-for-one with price even when no new money entered or left.

Why it matters

Market cap is the default size ranking of the industry, and size drives index inclusion, exchange listings, treasury mandates and headlines. Reading it correctly means treating it as price times a judged denominator — useful for rough scale comparisons, weak as evidence of invested wealth. When CML analysis notes that a token’s rally added billions in capitalization, that is a description of repricing, not of inflows.

The market-cap-to-FDV relationship is one of the most practical screens a reader has. A token trading at a low float with heavy scheduled unlocks faces a structural supply overhang: holders who received units at little or no cost may sell into the price that the small float produced. That does not predict the price will fall — it identifies who can sell, how much and when, which is a question every analysis of such a token has to address.

Risks and misconceptions

The main misconception is treating market cap as money that entered the asset, or as money that could leave it. Capitalization is not a pool of dollars; a small trade can move the price and therefore reprice every unit without any comparable flow of funds. A second misconception is comparing market caps across tokens as if the denominators were computed the same way — supply classifications differ by aggregator, and self-reported circulating figures can overstate the float.

FDV has its own failure modes. Maximum supply can change: governance can vote to burn units, alter emission or mint more, making the “fully diluted” number a snapshot of current rules rather than a physical limit. And for tokens whose emissions stretch over decades, FDV discounts nothing for time — it prices units that may not exist for twenty years at today’s marginal price. Treat a very large FDV-to-market-cap ratio as a prompt to read the unlock schedule, not as a valuation verdict in either direction.

Practical example

Suppose a token trades at 2 dollars with 100 million circulating units and a 1 billion maximum supply. Its market cap is 200 million dollars; its FDV is 2 billion. If 50 million already-vested tokens unlock next quarter, circulating supply grows by half and the market cap rises mechanically even at a flat price — but that is float expansion, not dilution of a holder's share of the 1 billion fully diluted maximum. Those units were already counted in that maximum; what changes is that more units are now free to sell. Dilution must name its denominator: issuing newly minted units under the existing cap reduces a holder's share of currently issued or circulating supply even though the maximum is unchanged, while raising the maximum can also reduce the holder's share of the fully diluted total. A reader comparing this token's 200 million cap to another token's 200 million cap with full supply outstanding is comparing a small float with a large overhang against a finished distribution. The equal headline number hides the difference that matters.

What changes over time

Supplies change on schedules and by decision: vesting cliffs pass, emissions accrue to stakers, tokens are burned, treasuries deploy, bridges mint wrapped copies that must not be double-counted. Aggregators also revise their classifications when teams disclose new information, so a market cap can jump without any trade. The price input changes continuously, which means capitalization is only meaningful with a timestamp.

When reading a size claim, check three things: which aggregator’s supply figure is used and what it excludes, how close market cap is to FDV and what the unlock calendar says about the gap, and whether the price behind the multiplication comes from deep or thin markets. The liquidity behind the price is covered in the crypto-liquidity guide; this page’s question is only what the multiplication does and does not measure.