In response to heightened regulatory scrutiny regarding insider trading, major Wall Street banks have tightened their internal rules concerning employee activities on prediction market platforms. Following a surge in prediction market trading ahead of the U.S. midterm elections, Goldman Sachs, JPMorgan Chase, Morgan Stanley, and Bank of America have revised their policies to mitigate potential conflicts of interest and increase monitoring of trades associated with various political, financial, and corporate events.
The revisions come amid investigations into dubious trading practices and allegations of insider trading. As prediction market trading expands rapidly, particularly with upcoming electoral events, authorities are intensifying their oversight. Banks now view these platforms as compliance risks necessitating stricter regulations, as opposed to merely niche trading venues.
Goldman Sachs has adopted an outright ban on its employees from engaging in prediction market trades related to sensitive financial and political events. Violators of this policy may face significant disciplinary actions, including termination and forfeiture of gains derived from such activities. On the other hand, JPMorgan Chase has opted for a policy that restricts employees from accessing non-public information while engaging in prediction market trading, rather than an outright prohibition.
Bank of America and Morgan Stanley have similarly implemented new regulations, focusing on trading practices related to economic and market predictions. This shift is reflective of a broader transformation in Wall Street's approach to prediction markets, particularly following legal proceedings against individuals accused of profiting from insider information in such trading.
For instance, in May 2026, charges of wire fraud and commodities manipulation were brought against a Google software engineer who allegedly gained over $1.2 million in illicit profits from trading prediction market contracts worth $2.75 million using insider information, stirring fears among banks about potential insider trading risks within prediction markets.
In addition, prediction market platforms are enhancing oversight protocols. For example, Kalshi has partnered with Solidus Labs to implement stricter market surveillance measures and is establishing an independent panel to oversee trading actions. These developments indicate a significant shift towards diligence in compliance and the safeguarding of market integrity.
This material is informational and should not be construed as financial advice.
