[Wall Street Banks Tighten Employee Restrictions on Prediction Market Trading to Prevent Insider Trading Risks] BlockBeats News, July 10: As concerns over insider trading in prediction markets intensify, several Wall Street investment banks are tightening their employees' trading permissions on prediction market platforms. Reports indicate that Goldman Sachs has prohibited employees from trading contracts related to the bank, financial markets, macroeconomics, elections, and geopolitical events. Morgan Stanley has also established a policy for employee prediction market trading, while Bank of America is introducing new restrictions on employee trading activities. Previously, the U.S. Department of Justice and the Commodity Futures Trading Commission (CFTC) disclosed that a Google software engineer profited approximately $1.2 million on Polymarket by leveraging non-public information obtained through his work, further heightening concerns about insider trading in the market. Meanwhile, Polymarket is seeking to expand its U.S. operations. Its affiliated company, Coming Home GBA LLC, has applied to the National Futures Association (NFA) to become a Futures Commission Merchant (FCM), with plans to offer margin prediction trading services to U.S. users in the future. However, this business expansion still requires approval from the CFTC. Competitor Kalshi's affiliated company obtained similar qualifications in March of this year. Data shows that Polymarket set a single-day trading volume record of $713 million on June 20, while Kalshi's monthly trading volume in June reached nearly $9.4 billion, driven by the 2026 FIFA World Cup. The popularity of prediction market trading continues to rise.