Pump.fun Bonding Curve Mechanics — How Price Moves
The Pump.fun bonding curve formula, the five-phase journey, the 85 SOL graduation threshold, and when to buy or sell as a trader.
Pump.fun spawns thousands of new memecoins every day. Roughly 2-3% graduate to Raydium; the other 97-98% die inside the bonding curve at near-zero value. Knowing which side a token is on requires understanding how the bonding curve actually works. This guide covers the math, how price moves with supply, the 85 SOL graduation threshold, and what to watch for as a trader.
What a bonding curve is
A bonding curve is an automated pricing mechanism where the token price is set by a math formula based on circulating supply. There's no order book — you buy, supply rises, the next buy costs more. You sell, supply falls, the next sell costs less. The curve gets steeper the more trades happen.
Pump.fun specifically uses a quadratic bonding curve: price is the derivative of supply squared. Practically: the first 50% of the supply is "cheap"; the last 50% gets dramatically expensive. Early in the curve, 1 SOL buys a large chunk of tokens; late in the curve, the same 1 SOL buys far fewer.
Pump.fun bonding curve mechanics
Pump.fun uses fixed parameters for every token:
- Total supply: 1,000,000,000 tokens
- Initial virtual SOL in the pool: 30 SOL (curve starting reserve)
- Graduation threshold: ~85 SOL in the pool triggers graduation
- Dev buyback fee: about 1%
- Trading fee: 1%
Logic: as SOL flows into the pool, token price rises along the curve. When the curve completes (85 SOL in the pool, ~800M tokens distributed to holders), the bonding curve closes and the remaining ~200M tokens + 79 SOL transfer automatically into a Raydium AMM pool. LP tokens are burned; the pool is permanent. The project leaves the bonding curve and trades on Raydium going forward.
The five phases of the curve
Phase 1: Launch (0-5 SOL)
Token is created, the first 5 SOL of buys lands (usually dev or snipe bots). Price is very low, market cap a few thousand dollars. This is the make-or-break phase: either the token rockets to 10-20 SOL fast, or it hits zero.
Phase 2: Early momentum (5-25 SOL)
Volume grows, holder distribution widens, social momentum starts. Price action in this phase is roughly 10-30x. An early wallet that bought 1 SOL can be at 30 SOL profit. Risk is still high; about 70% of tokens fail to clear this phase.
Phase 3: Mid curve (25-50 SOL)
Token enters trending lists, KOLs notice, FOMO kicks in. The curve is now steeper. New buyers get fewer tokens per SOL; volume is high but profit margins shrink.
Phase 4: Approach to graduation (50-85 SOL)
Token is close to graduation; many traders bet on whether it will graduate. Snipe bots are heavily active in this phase. As the pool nears 85 SOL, price volatility becomes extreme.
Phase 5: Graduation
When the pool fills 85 SOL, Pump.fun automatically migrates ~200M tokens + ~79 SOL into a Raydium AMM pool. LP burns. Mint authority is revoked. Trading moves from the bonding curve to a classic AMM, and price action no longer follows the curve.
When to buy, when to sell — trader perspective
Ideal entry: phases 2-3 (5-25 SOL), if social momentum and holder distribution are widening. This window has the highest profit margin on winners — but 70% of tokens fail this phase, so loss risk is steep.
Safer entry: phase 4 (50-70 SOL), if graduation looks near-certain. Profit margin drops (rarely more than 5-10x), but the hit rate is much higher.
Exit: many traders sell at graduation. The first 5 minutes after graduation see dump volatility; price often drops 30-50%. If you intend to hold long-term, the dump pressure clears within 24 hours and the market settles into a natural level.
For fast exits, the Solana multi-swap tool routes through Jupiter for the best rate and sells in one signature. For coordinated multi-wallet exits, the universal bundled sell tool closes positions across many wallets in a single Jito bundle.
Launching a token on Pump.fun
You can launch directly from the Pump.fun UI or via tooling. The Pump.fun token creation tool ships a bonding-curve launch with no code: name, symbol, image, description, social links. Mint authority, freeze authority, and LP burn are handled automatically at launch. Cost: ~0.02 SOL (dev fee) plus Solana network fees.
Post-launch tooling: the Solana multi-sender tool distributes early-holder rewards via CSV bulk airdrop. The Solana token snapshot tool exports the live holder list from a mint address for tracking distribution.
Common misconceptions
"You can manipulate the bonding curve": Pump.fun's curve is an on-chain Solana program — there's no manipulation knob. Price moves come from real buys and sells.
"Graduation = guaranteed profit": not at all. The first 24 hours after graduation are highly volatile; 50%+ drawdowns happen. Graduation is the start of a different market, not a finish line.
"Buy early, sell at graduation, profit": 97-98% of Pump.fun tokens never graduate. The average outcome of buying early and holding 30 days is 95%+ loss.
"High volume means safer": bot-generated volume is widespread. Check volume source wallets on DexScreener — if 5-10 wallets dominate, you're looking at fake volume.
What's next
With the bonding curve mechanics in place, you can navigate Pump.fun launches and trades from scratch. For launching, the Pump.fun token creation tool; for post-graduation trading, the multi-swap tool. If you want a classic launch path instead, the Solana token creator tool plus Raydium pool open tool is the alternative. More guides at the Solana token guides category and Solana tag page.
