Terra and Luna: how $40 billion vanished in a week

In May 2022, the crypto market lost about $40 billion in a single week — not to a hack or fraud in the usual sense, but because an algorithmic stablecoin called UST stopped holding its dollar peg. The Terra ecosystem, which had ranked among the ten largest blockchains by market cap just weeks earlier, disappeared within days, and its creator, Do Kwon, ultimately received a 15-year US prison sentence.

Who Are Terra and Do Kwon

Terraform Labs, the company behind the Terra blockchain, was founded in 2018 by South Korean entrepreneur Do Kwon and Daniel Shin, co-founder of South Korean e-commerce service TMON. The project's premise was a "stable" cryptocurrency that held its dollar peg not through bank reserves, like USDT or USDC, but through an algorithm paired with a second, volatile token: LUNA.

How UST Worked — and Why It Paid 19.5% a Year

UST's mechanism relied on arbitrage: users could always swap $1 worth of LUNA for 1 UST and back, with the protocol burning one token and minting the other on each swap. If UST's price dipped below a dollar, arbitrageurs were incentivized to buy it cheap and swap it for $1 worth of LUNA, and that demand was supposed to push the price back to the peg. The catch: the whole system rested on constant demand for LUNA and market confidence, not on real dollar or treasury reserves.

The main engine of UST demand was Anchor, a lending protocol launched by Terraform Labs in March 2021 that offered UST depositors a 19.5% annual yield — an order of magnitude above any bank deposit and most other DeFi protocols. That yield wasn't funded by organic borrower demand; it was partly subsidized by the protocol's own reserve fund, which made it vulnerable to a large-scale outflow of capital.

The Rapid Rise

By April 2022, UST's market cap had reached about $18 billion, making it the world's third-largest stablecoin, while LUNA hit a new all-time high above $119. Terra's combined ecosystem market cap topped $40 billion, and the network ranked among the largest blockchains by DeFi assets locked, driven in large part by Anchor's yield pulling in capital from across the market.

The Week That Changed Everything

On May 7, 2022, large UST sell orders worth tens of millions of dollars hit the Curve decentralized exchange, and combined with accelerating withdrawals from Anchor, triggered the first visible depeg: UST's price slipped to $0.985. Instead of stabilizing, the situation spiraled further — the algorithm began minting more and more LUNA to absorb the excess UST, which only added to the selling pressure on LUNA itself and fed the panic.

Within days, LUNA's supply exploded from roughly 340 million to more than 6.5 trillion tokens, and its price, which had traded above $80 in April, crashed to fractions of a cent. On May 12, LUNA lost 96% of its value in a single day; many exchanges halted trading on the token, and by the next day its price was effectively zero. The Luna Foundation Guard, the project's reserve fund, tried to defend the peg by deploying over $3 billion in Bitcoin reserves — but even that wasn't enough to stop the collapse.

"I Am Not 'On the Run'"

After the crash, Do Kwon initially kept engaging publicly with the community, floating plans to "revive" the ecosystem. When South Korean prosecutors announced in September 2022 that they couldn't determine his whereabouts and media outlets described a manhunt for the Terra founder, Do Kwon responded on X (then Twitter):

“I am not "on the run" or anything similar – for any government agency that has shown interest to communicate, we are in full cooperation and we don't have anything to hide.”

— Do Kwon, post on X, September 18, 2022

Quote source: CoinDesk, October 18, 2022

The Montenegro Arrest

In March 2023, Do Kwon was detained at the airport in Podgorica, Montenegro, while trying to board a flight on falsified travel documents — authorities found him carrying multiple passports, including a fake Costa Rican one. A local court sentenced him to four months in prison on document-forgery charges, kicking off a nearly two-year tug-of-war between the US and South Korea over his extradition.

Extradition and the US Sentence

Do Kwon was extradited to the US on December 31, 2024. In August 2025, he pleaded guilty to charges of securities fraud, commodities fraud, and wire fraud. Prosecutors showed that back in May 2021, when UST first briefly lost its dollar peg, Kwon had secretly arranged for a trading firm to buy up the token to artificially restore its price — while publicly claiming the algorithm alone had fixed it.

On December 11, 2025, US District Judge Paul Engelmayer sentenced Do Kwon to 15 years in prison — notably more than the 12 years prosecutors had requested, and three times the five years his defense had sought. The total harm to UST and LUNA holders from the collapse was put at roughly the same $40 billion that evaporated in May 2022.

What's Left of Terra

The original chain, renamed Terra Classic by the community, still exists, with its LUNC token trading orders of magnitude below its all-time high. Terraform Labs separately launched a new chain, Terra 2.0, with a fresh LUNA token that carries no algorithmic peg to any stablecoin — but the ecosystem never came close to recovering its former scale or market trust.

What This Means in Practice

Terra's story became the clearest proof that algorithmic stability isn't the same thing as reserve-backed stability: without real dollar assets standing behind it, a peg holds only as long as demand and confidence do, and both can vanish within hours of a panic. The practical lesson for users is simple: a yield that dramatically outpaces the market is almost always the price of a hidden risk, not a free bonus — and the higher the number, the more closely the mechanism behind it deserves scrutiny.

This material is for informational purposes only and is not investment advice.