A crypto bank run: how TITAN lost 100% of its value in a single day even with Mark Cuban's backing (Iron Finance)

Iron Finance drew the attention of even billionaire Mark Cuban, who publicly backed the project as a liquidity provider just days before the disaster. In the space of a day the TITAN token fell from roughly $65 to practically zero — not because of developer fraud, but because of a structural flaw in a partially collateralized stablecoin that played out as a classic "bank run." Participants' combined losses are estimated at more than $2 billion.

The protocol was built around IRON, a stablecoin pegged to the dollar but only partially collateralized: part of the reserve consisted of USDC and part of the protocol's own governance token, TITAN. This model was presented as a capital-efficient alternative to fully collateralized stablecoins and, in early June 2021, quickly gained popularity, partly thanks to the public backing of Mark Cuban, who wrote about his own experience providing liquidity to the pool.

On 16 June 2021, large token holders began pulling liquidity en masse from the IRON/USDC pool and selling their TITAN positions instead of redeeming IRON directly, which started to push IRON off its dollar peg. The situation was compounded by a smart contract technical glitch that temporarily blocked the ability to redeem IRON, intensifying panic among participants. The mint-and-swap mechanism, meant to hold IRON's dollar peg through TITAN, only accelerated the sell-off of the latter under these conditions.

TITAN's price collapsed from around $65 to almost zero — a drop of more than 98% in less than 24 hours. Mark Cuban confirmed on Twitter that he had been hit as a liquidity provider, though he had earlier made a profit in another pool. In its own post-mortem, the Iron Finance team called the event the first large-scale "bank run" in the history of the crypto market, categorically denying that it was a deliberate rug pull.

No criminal or civil fraud cases were brought over this incident. Iron Finance is still cited as a textbook example of the structural fragility of partially collateralized algorithmic stablecoins — as opposed to deliberate exit scams.

Published 27 November 2025