A wager on a bank failure does not merely forecast financial instability. It gives the trader a direct interest in the event, including any rumours or privileged information that might help bring it closer. The Guardian’s Kalyeena Makortoff reports that Polymarket’s offshore platform has taken $77,507 in positions on whether major banks will fail before the end of 2026, including HSBC and Lloyds.
The amount is too small to present evidence of a current threat to either bank. The regulatory concern is what happens if the product grows. Bank runs can accelerate when online speculation prompts depositors to withdraw at the same time. A trader with a position on failure may possess confidential information, or may profit by circulating claims that intensify the pressure.
The UK’s Financial Conduct Authority told the Guardian that it has been speaking with international regulators about prediction markets as part of its work on market integrity. Liberal Democrat MP Bobby Dean, a member of the Treasury committee, urged British authorities to intervene. His warning that a rapidly growing contract could help trigger a run is a prospective risk argument, not evidence that Polymarket has already moved deposits.
The information defense
Polymarket says the contracts widen access to information. Its chief legal officer, Neal Kumar, argues that banks, hedge funds and credit professionals have long traded bank risk through credit default swaps, while a binary market makes the signal understandable to a larger audience.
That comparison explains the appeal but not the full cost. The offshore platform bars residents of the UK, US, Canada and EU under its terms, yet geographical restrictions can be evaded with VPNs. Its accounts are visible as wallet addresses but can be difficult to connect to named people. A public price may convey information while the platform remains unable to establish whether the person setting that price learned something through legitimate research, confidential access or manipulation.
The European Securities and Markets Authority made that problem explicit in a September risk report, warning that prediction markets are “rife with inside trading.” It pointed to limited identity checks and recent episodes in which traders appeared to know consequential events before the public. The cases cited include wallets that reportedly made $1.2 million shortly before the US-Israel strike on Iran became public, the prosecution of a US soldier accused of trading with classified information before the capture of Nicolás Maduro, and suspected tampering with airport weather sensors used to settle weather contracts.
Bank-failure markets are still marginal products. But they show why the industry’s “gambling or finance” distinction is incomplete. The same contract can produce a useful signal and a harmful incentive. If it scales, the people who bear the downside are not limited to the traders: depositors, bank employees and the public institutions responsible for financial stability are exposed to the event that the market pays someone to anticipate—or influence.