Market Cap vs FDV: Why the Number Next to the Price Can Mislead You

Two coins can trade at the same price and be worth completely different amounts. Price on its own says almost nothing about how large or how expensive a coin is. The numbers that do are market cap and fully diluted valuation, and the gap between them is one of the most useful things you can check before buying an altcoin.

Market cap

Market cap = price × circulating supply

Circulating supply is the number of tokens that are actually out there and tradeable today. Market cap is the value of that circulating portion at the current price. It is the usual number used to compare coins by size.

Fully diluted valuation (FDV)

FDV = price × total (or maximum) supply

FDV is what the whole project would be worth if every token that will ever exist were already circulating, at today's price. It includes tokens that are locked, vesting, held in reserve, or not yet released.

A worked example (numbers are made up for illustration)

Imagine a token priced at $1.

• Circulating supply: 100 million tokens
• Total supply: 1 billion tokens

Market cap = $1 × 100 million = $100 million FDV = $1 × 1 billion = $1 billion

The coin looks like a $100 million project. But 900 million more tokens, nine times the amount now trading, are waiting to be released over time. For the price to stay at $1 as they arrive, demand would have to absorb a valuation ten times larger. If demand does not grow to match, the extra supply pushes the price down.

Why the ratio matters

Divide market cap by FDV to see how much of the supply is already out.

• A ratio close to 1 (for example 0.8 or above): most tokens already circulate. There is little new supply to come, so dilution is a smaller risk.
• A low ratio (for example 0.1 to 0.2): most of the supply is still to come. Future unlocks are a constant pressure on the price.

Neither is automatically good or bad. A young, well-funded project is expected to have a low ratio. What matters is that you know it, and price it in.

Cases where FDV can mislead too

• Some tokens never fully unlock. Some supply may be burned, held in reserve that is never sold, or locked permanently. FDV then overstates the eventual float.
• Inflationary tokens have no fixed cap. Where supply keeps growing forever, "total supply" is a moving target.
• Circulating supply is reported by the project or aggregator. It is sometimes out of date or defined generously. Check it against the chain when it matters.

How to use it when choosing coins

1. Compare coins in the same category by FDV, not only market cap. A coin with a $50 million market cap and $2 billion FDV is priced very differently from one with $50 million on both.
2. Check the vesting schedule. The FDV gap tells you there is supply coming. The schedule tells you when. See token unlocks and vesting.
3. Be extra careful with low-float, high-FDV coins. A small number of tokens trading against a large hidden supply is a known pattern of new launches where early buyers end up as the exit liquidity.
4. Treat it as one input. A high FDV is a risk, not a verdict. A fast-growing project can grow into its valuation.

It is also one of the quick checks in our altcoin red flags list. A good order of work is to start with the scan in the open the terminal, free, which narrows the market to coins with a trend and real volume, and then check market cap and FDV for each candidate on a data aggregator before you decide.