Mango Markets
From Invertopedia, the encyclopedia of how things fail
Mango Markets was a Solana-based decentralized exchange where users could lend, borrow and trade with leverage[1]. On October 11, 2022, Avraham Eisenberg used two accounts to take both sides of a large MNGO futures position, then bought enough MNGO to push its price up more than 1,000% in 20 minutes[2][3][6]. Against that inflated position he borrowed and withdrew about $110 million, leaving the exchange effectively insolvent[1][6]. He later returned $67 million in a deal with the DAO[3][4].
Contents
The bet
Mango valued collateral at the market price reported by its price oracle, which drew on trading at FTX, AscendEX and Serum[3]. The belief was that a market price is a fair price, and that if an account's collateral was worth more, it could safely borrow more. Mango had no terms of service, no rule against manipulation and no requirement to repay loans[3].
What happened
| Oct 11, 2022 | Eisenberg puts $5 million in USDC into two Mango accounts and has one sell MNGO perpetual futures to the other.[2][3] |
|---|---|
| Oct 11, 2022 | He buys MNGO on the exchanges that feed Mango's oracle. The price jumps more than 1,000% in 20 minutes, and so does the value of his long position.[3][6] |
| Oct 11, 2022 | He borrows and withdraws about $110 million in various crypto assets, draining the platform.[1][2] |
| Oct 14, 2022 | Mango DAO offers a $47 million bounty and a promise not to press charges if $67 million is returned. Eisenberg later returns $67 million, and a governance vote lets him keep $47 million.[1][3][4] |
| Dec 2022 | Eisenberg is arrested in Puerto Rico and charged with commodities fraud and commodities manipulation.[1][4] |
| Jan 20, 2023 | The SEC sues him, alleging fraud and market manipulation, and the CFTC files a parallel civil case.[2] |
| Apr 2024 | After a nine-day jury trial, he is convicted of commodities fraud, commodities manipulation and wire fraud.[3][7] |
| 2025 | Mango Markets ceases operations.[5] |
| May 23, 2025 | Judge Arun Subramanian vacates the two commodities convictions for improper venue and acquits him of wire fraud. Prosecutors appeal.[3][5][7] |
The kill shot
Mango let one trader decide what his collateral was worth. The token was thinly traded, so a few million dollars of buying set the price that a hundred million dollars of loans relied on.
Nothing in the code broke. The oracle reported the price it saw, and the lending rules did what they said[3]. Eisenberg said afterward that he was "involved with a team that operated a highly profitable trading strategy"[1], and that the insurance fund was not big enough to cover the liquidations[1].
The criminal case turned on the same point. The judge found no proof of a false statement to a platform that had no rules against what he did[3][6], and that New York was the wrong place to try him because he traded from Puerto Rico[5].
Red flags ignored
- Collateral priced by a thin market. MNGO was thinly traded, so buying it moved the price.[2]
- No cap on borrowing against one token. A single inflated position could borrow almost everything the platform held.[2]
- Both sides in one hand. One trader held the long and the short of the same futures position.[2][3]
- An insurance fund too small. It could not cover the liquidations once the price fell back.[1]
The cost
About $110 million was withdrawn[1]; the SEC put it at about $116 million[2]. Eisenberg returned $67 million and, by a governance vote, kept $47 million[4]. Mango Markets ceased operations in 2025[5].
The inversion
Never let a price someone can push decide how much they can borrow. Cap what any one thin market can back, and price collateral at what it would fetch if you had to sell it.
What survived
The legal argument. Eisenberg was convicted by a jury in April 2024[3][7], but in May 2025 the judge vacated the commodities convictions for improper venue and acquitted him of wire fraud, finding that Mango had no terms of service or rules against manipulation[3][5]. Prosecutors appealed, and in a December 2025 filing said the reasoning "would unsettle traditional understandings of fraud"[7]. The SEC and CFTC civil suits were still open as of the May 2025 ruling[3].
References
- ^ “Mango Markets Attacker Avraham Eisenberg Arrested, Charged With Market Manipulation Offenses”. Decrypt (Jason Nelson), December 28, 2022. Solana-based DEX governed by a DAO, October 11, 2022, about $110 million, the DOJ charges, Eisenberg's "highly profitable trading strategy" statement and insurance-fund remark, the October 14 DAO offer.
- ^ “SEC Charges Avraham Eisenberg with Manipulating Mango Markets' "Governance Token" (Litigation Release No. 25623)”. U.S. Securities and Exchange Commission, January 23, 2023. The two-account MNGO futures scheme, the thinly traded MNGO, about $116 million borrowed and withdrawn, the January 20, 2023 complaint, parallel DOJ and CFTC cases.
- ^ “Federal Judge Overturns All Criminal Convictions in Mango Markets Case Against Avraham Eisenberg”. TRM Labs, May 23, 2025. $5 million in USDC, the oracle sources, the April 2024 nine-day trial and convictions, the May 2025 ruling by charge, no terms of service, $67 million returned, open SEC and CFTC suits.
- ^ “Avraham 'Avi' Eisenberg pushes to have earlier Mango Markets conviction cleared, asks for new trial”. The Block (Sarah Wynn), August 8, 2024. Arrest in Puerto Rico in December 2022, $67 million returned, $47 million kept by governance vote.
- ^ “U.S. judge overturns fraud convictions of Mango Markets exploiter Eisenberg, determining improper venue”. The Block (Zack Abrams), May 24, 2025. Judge Subramanian's venue ruling, two convictions vacated and an acquittal on a third, Mango ceasing operations in 2025.
- ^ “Judge Overturns Convictions in Mango Markets Exploiter's Crypto Fraud Case”. CoinDesk via Yahoo News (Francisco Rodrigues), May 24, 2025. MNGO up more than 1,000% in 20 minutes, $110 million borrowed, the judge's "insufficient evidence of falsity" finding.
- ^ “Prosecutors appeal acquittal of Mango Markets exploiter Avraham Eisenberg”. DL News (Aleks Gilbert), January 7, 2026. The 2024 jury verdict on three counts, commodities convictions vacated and wire-fraud acquittal, the December 22, 2025 appeal filing and quote.