How Does pump.fun Work?
pump.fun is a Solana-based memecoin launchpad that allows anyone to create and trade tokens with no coding required. Launched in January 2024, it has generated over 11.9 million tokens and earned more than $780 million in cumulative revenue from trading fees. Its PUMP token was launched via a $1.3 billion ICO in July 2025. In April 2026, the team restructured the revenue model — burning 36% of circulating PUMP supply and locking 50% of ongoing revenue into an irreversible buyback contract. The C+ grade reflects significant regulatory exposure from an active RICO class action, recurring content moderation failures, and the inherent boom-bust nature of memecoin speculation, partially offset by strong revenue generation ($235M PumpSwap TVL, ~$677K/day revenue) and dominant market position.
TVL
$235M
Sector
DeFi
Risk Grade
C+
Value Grade
C-
Core Mechanisms
2.2.1
Novelpump.fun bonding curve — automated token pricing where price rises with purchases and falls with sales, graduating to PumpSwap DEX at $69K market cap threshold
While bonding curves are not new (friend.tech, Bancor), pump.fun's specific implementation with automatic graduation to a full AMM at a market cap threshold and zero-cost token creation is a novel combination that created a new category of memecoin launcher. The pattern has been replicated but is still less than 3 years old.
2.1.1
PumpSwap V1 AMM — Uniswap V2-style constant product AMM for graduated tokens, with 0.25% swap fee (0.2% to LPs, 0.05% to protocol)
Standard constant product AMM, directly modeled after Uniswap V2 and Raydium V4. Well-established pattern.
4.1.1
PUMP token buyback — as of April 2026, 50% of daily protocol revenue allocated to locked auto-buyback/burn contracts (~50% previously discretionary, now irreversible), with 50% retained for operations
Standard buy-and-burn/buyback mechanism. Restructured April 29, 2026 from 100% discretionary to 50% auto-locked; accompanied by a one-time burn of ~36% of circulating supply.
1.1.1
Token creation factory — permissionless token deployment with preset parameters (name, symbol, image) requiring no code and no deployment fee
Token factory pattern is well-established. pump.fun's innovation is in the user experience and automatic liquidity bootstrapping, not the factory contract itself.
2.2.2
Graduation mechanism — automatic migration from bonding curve to PumpSwap DEX when token reaches $69K market cap, with liquidity seeded from bonding curve reserves
Automatic liquidity migration is a variation of standard LP bootstrapping. The specific graduation threshold and migration logic are novel for this category but the underlying pattern is established.
1.1.3
Swap fee collection — 1% fee on bonding curve trades and 0.25% on PumpSwap trades, collected in SOL
Standard trading fee collection. Higher than industry average for DEXes but standard for specialized platforms.
How the Pieces Interact
Zero-cost token creation combined with predictable bonding curve pricing enables industrial-scale sniping — bots can detect new token creation transactions and front-run the first purchases, extracting guaranteed profits from retail buyers who arrive later on the curve.
The graduation threshold at $69K market cap creates a predictable target for pump-and-dump schemes. Manipulators can buy enough to push tokens past graduation, triggering PumpSwap listing and external attention, then dump on secondary market liquidity.
Revenue-funded buybacks are entirely dependent on trading volume, which is driven by memecoin speculation cycles. During bear market periods or declining memecoin interest, buyback volume collapses, removing the primary value accrual mechanism for PUMP holders.
The sheer volume of token launches (millions) combined with automatic graduation creates an environment where pump-and-dump tokens can legitimize through the graduation process, making it difficult for users to distinguish scams from genuine projects.
Price discontinuity during graduation from bonding curve to constant-product AMM can create arbitrage opportunities that extract value from passive holders, as the pricing model changes from curve-based to pool-based.
What Could Go Wrong
- Bonding curve manipulation and front-running: pump.fun's bonding curve mechanism sets token prices algorithmically based on buy/sell volume. Early participants (including bots and insiders) can buy at the lowest prices and dump on later buyers, creating a systematic wealth transfer from retail users to sophisticated actors. The platform's own revenue model benefits from high trading volume regardless of whether participants profit.
- Insider exploit history: In May 2024, a former employee exploited privileged access to pump.fun's smart contracts, stealing approximately 12,300 SOL (~$2M) via flash loan manipulation of bonding curves. While the attacker was a single disgruntled employee, the incident revealed that the platform's smart contracts had centralized access controls that could be abused.
- Active RICO class action with insider evidence: The Aguilar v. Baton Corporation lawsuit (S.D.N.Y.) asserts RICO racketeering claims with potential treble damages of ~$5.5B, bolstered by approximately 15,000 internal chat records submitted by a whistleblower in January 2026. The SEC's February 2026 guidance clarifying that memecoins do not constitute securities weakens the securities law theory but does not affect RICO claims. The June 2026 'GO' bounty platform launch — which hosted suicide-related and extreme content bounties within hours, mirroring the November 2024 livestream controversy — adds legislative pressure and reputational risk.
- Revenue model restructured but memecoin-dependent: In April 2026, pump.fun replaced its 100% discretionary buyback policy with a 50/50 split — 50% locked into an irreversible smart contract for ongoing buybacks and burns, 50% allocated to operations and growth — and simultaneously burned approximately 36% of circulating PUMP supply (~$370M). Despite these structural improvements, protocol revenue remains entirely dependent on memecoin speculation on Solana, running at approximately $677K/day (below the $1M+ peak). LetsBonk and Believe have captured a combined ~30% of launchpad market share, up from near zero in early 2025.
Regulatory Crackdown on Memecoin Launchpad Operations
ModerateTrigger: The RICO class action (Aguilar v. Baton Corporation, S.D.N.Y.) succeeds in obtaining treble damages, or legislative action targets memecoin launchpads specifically — triggered by recurring content moderation failures or international regulatory coordination. Note: Direct SEC enforcement is less likely following the SEC's February 2026 guidance that memecoins do not constitute securities.
- 1.RICO judgment or legislative enforcement action announced against pump.fun operators, citing facilitation of speculative token instruments with documented insider evidence from 15,000 internal chat records — US-based users are blocked from the platform, and major exchanges begin delisting PUMP token as a precautionary compliance measure
- 2.pump.fun trading volume collapses as users migrate to competing platforms or exit memecoin trading entirely — Daily revenue drops from ~$677K to near zero, eliminating both the 50% auto-buyback mechanism and operational budget
- 3.PUMP token price crashes as buyback support disappears and sell pressure from locked token unlocks continues on schedule — ICO investors who paid $0.004/token face losses as price drops below ICO price, with hundreds of billions of locked tokens still scheduled for unlock
- 4.PumpSwap liquidity drains as LPs withdraw, leaving graduated tokens with minimal trading depth — Millions of tokens launched on pump.fun become effectively untradeable, stranding holders
Risk Profile at a Glance
Overall: C+ (38/100)
Lower score = safer