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Coinbase CEO Brian Armstrong's Actions Spark Market Manipulation Debate

Published on October 31, 2025

Categories: Regulation Market Analysis Exchanges Business Ethics

Coinbase CEO Brian Armstrong's comments during a third-quarter earnings call reportedly resolved live prediction market contracts on Polymarket and Kalshi, leading to debates about potential market manipulation or mocking of niche betting venues by a prominent financial executive.

Brian Armstrong wrapped Coinbase’s third-quarter earnings call on Oct. 30, with a line that instantly resolved live prediction market contracts on Polymarket and Kalshi. The episode sparked debates about whether the industry’s most visible CEO had just mocked a niche betting venue or crossed a line that regulated financial executives shouldn’t approach. Armstrong said in […]

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A photorealistic image of a CEO at a podium, with digital market graphs and prediction market interfaces subtly projected around him, illustrating a debate on market manipulation or the ethics of public statements during an earnings call, with 'Coinbase' branding visible.