Several major Wall Street banks have introduced or updated internal rules governing employee participation in prediction markets as concerns grow over potential conflicts of interest and the misuse of confidential information. Goldman Sachs, Morgan Stanley, JPMorgan Chase and Bank of America have all taken steps to address employee activity involving event-based contracts offered by platforms such as Kalshi and Polymarket, according to people familiar with the companies’ policies. Prediction markets allow users to trade contracts tied to possible outcomes of real-world events, […]

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