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Manipulation on Polymarket: Governance Crisis and UMA's Role

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by Giorgi Kostiuk

3 days ago


Polymarket, a prominent decentralized prediction market, is at the center of controversy following alleged manipulation of its governance and oracle systems.

How the Alleged Manipulation Unfolded

Polymarket uses UMA's Optimistic Oracle to validate and settle bets. However, a significant UMA token holder allegedly manipulated the outcome of a market related to a supposed deal between the U.S. and Ukraine. The market had over $7 million at stake, resulting in major financial implications. Despite trader objections that no official agreement existed, the market resolved in favor of the insider.

Was There a Trump-Ukraine Deal?

Reuters reported Trump mentioned a potential deal on March 25, but no formal confirmation was ever made. Traders argued expectations do not equate to an actual agreement.

This is a big joke. Zelensky just announced they are looking into a bigger deal, which means there was no deal before. Wow, real scam.

Polymarket’s Response to the Controversy

Following the backlash, a Polymarket representative stated on Discord that the outcome was unexpected but did not constitute a market failure. They are working with UMA's oracle team to prevent future incidents.

We are aware of the situation regarding the Ukrainian Rare Earth Market. This market resolved against the expectations of our users. Unfortunately, because this wasn’t a market failure, we are not able to issue refunds.

The Polymarket scandal raises trust issues concerning the reliability of decentralized oracles and their governance mechanisms.

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