TL;DR
A bonding curve is a mathematical pricing model where a token’s price increases automatically as more tokens are bought and decreases as they’re sold, without needing a traditional liquidity pool.
Instead of relying on a DEX liquidity pool with two paired assets, a bonding curve uses a smart contract that mints tokens when SOL is deposited and burns them when SOL is withdrawn. The price follows a predetermined mathematical curve — typically exponential — so early buyers get lower prices and later buyers pay more. This creates a built-in price discovery mechanism without requiring any initial liquidity from the developer.
Pump.fun is the most popular bonding curve launchpad on Solana. When someone creates a token on Pump.fun, it starts on a bonding curve where anyone can buy or sell. The curve holds SOL as collateral. Once the curve collects approximately 85 SOL, the token “graduates” — the contract automatically creates a PumpSwap liquidity pool (Pump.fun’s own DEX; before 2025 this was a Raydium pool) and migrates the funds there. The vast majority of Pump.fun tokens (97%+) never reach this threshold.
Bonding curve tokens are high-risk, high-reward. Prices are extremely volatile because the curve amplifies both buys and sells. Slippage can be significant on larger orders. If you’re early, a token reaching graduation can mean substantial gains. If you buy near the top of the curve and the token never graduates, you may lose most of your investment as sellers drive the price back down.
Check the deployer’s track record using Deployer Hunter — past bonding rate is the strongest signal for whether a token will graduate. Look at the curve’s progress (how close it is to the SOL threshold), holder distribution, and whether the deployer holds a large percentage of supply. Fast early momentum and organic holder growth are positive signs.