TerraUSD’s peg strain persisted as Anchor withdrawals accelerated

The peg remained under pressure

TerraUSD entered May 8, 2022 below its one-dollar target after large trades and shrinking liquidity disrupted its principal Curve market late on May 7. The algorithmic stablecoin recovered from its sharpest initial deviation, but it did not immediately return to an unquestioned peg. The episode mattered because UST had become a major source of liquidity across decentralized finance, while Terra’s recently accumulated bitcoin reserve had not yet faced a visible market test.

A contemporaneous CoinDesk report published at 2:01 p.m. Eastern time on May 8 said UST had fallen to $0.987 on May 7 before rebounding on May 8. A later transaction-level review by Jump Crypto, using Greenwich Mean Time, found that UST remained within 100 basis points—or one cent—of its target during most of May 8. Those measurements came from Binance’s UST/USDT market and Curve’s wormhole-UST/3CRV pool. They were venue-specific observations, not a consolidated global price.

A thinner Curve pool met a large sale

Ethereum records show that an unidentified wallet exchanged 85,001,010 wormhole-wrapped UST for 84,509,386.836199 USDC through Curve at 21:57:24 UTC on May 7. The transaction succeeded on-chain. It demonstrates the trade’s size and output but does not identify the wallet owner or establish the trader’s intent.

Jump Crypto’s later reconstruction found that Terraform Labs had withdrawn 150 million UST of liquidity from the same pool shortly before that exchange. Additional large swaps and another withdrawal followed. Removing liquidity did not itself amount to selling UST, but it left the market shallower: subsequent trades could move the exchange rate more sharply than they would have in a deeper pool.

The pressure also appeared in Anchor Protocol, where UST holders deposited tokens to earn yield. CoinDesk reported that Anchor deposits fell from roughly 14 billion UST to 11.2 billion UST across the May 7–8 period. Jump’s later analysis estimated nearly $2.5 billion of net outflows during the evening of May 7 and early hours of May 8. The figures use different snapshots and data methods, so they should not be treated as perfectly interchangeable.

Why Terra’s design was being tested

UST did not rely on a conventional reserve containing one dollar of cash or short-term securities for every token. Terra instead offered a protocol mechanism intended to let users exchange one UST for approximately one dollar’s worth of LUNA. When UST traded below its target, arbitrageurs were expected to buy discounted UST, exchange it for LUNA and reduce the UST supply.

That mechanism depended on liquid markets, continued demand for LUNA and confidence that arbitrage could operate faster than withdrawals. On May 8, the verified facts supported a narrower conclusion than the collapse narrative that emerged later: UST had suffered a material liquidity disturbance, Anchor balances were falling, and its market price had not fully normalized. They did not establish that the system was already irrecoverable.

Terraform Labs co-founder Do Kwon publicly minimized the depeg concern on May 8. His post documented management’s contemporaneous posture, but it was not evidence that the peg’s underlying risks had been resolved. Claims circulating at the time that the trades constituted a coordinated attack were also unproven; the surviving transaction record did not establish coordination or beneficial ownership.

Later context

On May 9, 2022, Luna Foundation Guard announced a $1.5 billion lending plan involving bitcoin and UST as the peg deteriorated more severely. That later intervention confirms why the May 8 strain was consequential, but it was not yet part of the verified May 8 record.