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Memecoins · Concepts

What is a bonding curve, and what does it mean when a token graduates?

Open any freshly launched memecoin on pump.fun and you will see a "curve" percentage and, with luck, a note that it graduated. This article explains what a bonding curve is, how it sets the price and what actually changes at the moment of graduation.

What a bonding curve is

A bonding curve is a mathematical formula that sets the price of a token based on how many units have already been sold. There is no order book and no seller waiting on the other side: you buy directly from the contract, every buy pushes the price up for the next person, and every sell pushes it down.

The idea is simple: price is a function of circulating supply. The more of the token the public holds, the more the next unit costs. That is why early buyers pay less and late buyers pay more.

On memecoin launchpads the curve solves a practical problem: a brand-new token has no liquidity. Nobody has put money into a pool so that others can trade. The bonding curve creates that liquidity automatically from the first second, because the contract is everyone's counterparty.

How it works on pump.fun

pump.fun, the best-known launchpad on Solana, uses a curve based on the Uniswap V2 constant-product formula, with "virtual reserves" so there is liquidity from the start. According to its public documentation, the scheme works like this:

  • Every token is created with a total supply of 1 billion units. Nobody has to seed liquidity up front.
  • Roughly 793 million of those are sold through the curve; the rest is reserved for the liquidity pool that is created at the end.
  • Each buy takes tokens out of the curve and puts SOL in; each sell does the opposite. The price moves with the formula, with no intermediaries.
  • The curve is marked complete on the buy that leaves the real token reserve at zero. With the current parameters, that happens once about 85 SOL net has flowed in. The equivalent market cap in dollars moves with the price of SOL, which is why the "USD threshold" you see quoted online varies from one period to another.
  • pump.fun charges a fee on every buy and sell. The platform sets the percentage and has changed it over time, so check its documentation before you run numbers.

The "curve" percentage shown by tracking tools and memecoin alerts tells you how much of that journey is already done. A curve at 80% means only a few more SOL are needed for the token to leave the launch phase.

What it means when a token graduates

Graduating (also called "bonding") is the moment the bonding curve completes and the token leaves the launchpad for an open market. On pump.fun, when the curve completes, the accumulated liquidity (the SOL that came in plus the reserved tokens) is migrated to a pool on PumpSwap, the platform's own decentralized exchange. Until March 2025 that migration went to Raydium and cost 6 SOL; since then it goes straight to PumpSwap with no migration fee.

Two details matter for buyers:

  • The new pool's LP tokens are burned. In other words, nobody (not the creator, not the platform) can pull that initial liquidity out. It does not remove every risk, but it closes the door on the classic "drain the pool" rug pull.
  • The migration is permissionless: anyone can run the instruction that moves the liquidity once the curve is complete. In practice it happens within seconds.

Before graduation the token exists only on the launchpad and can only be traded against the curve. Afterwards it trades on an open market like any other Solana token: it shows up on aggregators such as DexScreener, it can be traded from any wallet or bot that talks to PumpSwap, and it starts competing for attention with thousands of other tokens.

What changes after graduation

Graduating does not mean the token is good or that it will go up. It only means there was enough buying to complete the curve. These are the real differences:

  • The price no longer follows a fixed formula. On the curve, every buy raised the price predictably. In the open pool the price depends on supply and demand, and it can fall as fast as it rose.
  • There is more liquidity, but also more sellers. People who bought cheap on the curve often use graduation to sell. A sharp drop right after graduating is very common.
  • The token becomes visible. It enters the listings, bots pick it up and it appears on more screens. That can bring new buyers, or simply more people who dismiss it.
  • Fees change. Curve fees go to the launchpad; pool fees go to the exchange (part to liquidity providers, part to the protocol).

Why the curve percentage matters

Memecoin alerts usually show the curve progress, the market cap, the number of holders and the dev's share. Together they tell a story: a token at 80% of the curve with hundreds of holders and steady buying behaves very differently from one at 80% with fifteen wallets holding almost everything.

In the AlphaEngine memecoin alerts, the "Curve" field is exactly that percentage, with an estimate of how long graduation will take at the current pace. It is a data point, not a recommendation: it tells you where the token is in its launch so you can decide with information instead of in a hurry.

Risks around graduation

The launch phase is where a large share of memecoin scams happen. Some warning signs:

  • Bundles. The creator buys a large chunk of the token with several wallets in the same block as the launch. It then looks like there are many holders, but they are all the same person.
  • A dev holding too much. If the creator wallet holds a high percentage, it can dump everything at the moment of peak liquidity, right at graduation.
  • Curves that never complete. Most tokens do not graduate. Public data from different periods puts the share of launched tokens that complete the curve at around 1% to 2%. The rest stall part-way with little liquidity, and selling can be hard or outright impossible.
  • Copycat names. Copies of a token that is pumping get launched within minutes. The only reliable identifier is the contract address, not the name or the logo.

Before you put money into any token, check its contract. We walk through it step by step in how to check a memecoin contract. And if a term is unfamiliar, it is in the memecoin and futures glossary.

Frequently asked questions

What does graduating mean on pump.fun?

It means completing the bonding curve: when the tokens available on the curve run out, the accumulated liquidity is migrated to a PumpSwap pool and the token starts trading on an open market. With the current parameters that happens once about 85 SOL net has flowed in.

Is a graduated token safer?

Not necessarily. Graduation only shows there was enough buying to complete the curve and that the pool's initial liquidity was burned. The risk that large holders sell, that the project is abandoned and that you lose everything you put in is still there.

What happens to my tokens when it graduates?

Nothing changes in your wallet: you hold the same units. What changes is where they trade: no longer against the launchpad's curve, but in the decentralized exchange's pool.

Why does the price often drop right after graduation?

Because the people who bought cheap early on the curve use the fresh liquidity to sell. If not enough buyers show up to absorb those sales, the price falls.

Risk warning. Memecoins are extremely volatile and you can lose 100% of what you invest. This article is general information, not investment advice and not a recommendation to buy any token. Only use money you can afford to lose.

See the AlphaEngine memecoin alerts

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