Published July 11, 2026 Updated about 3 hours ago By Reuters NEW YORK: Wall Street banks have added rules on prediction-market betting to their employee codes of conduct, with some barring employees from bets on contracts linked to financial markets and political events, according to three sources familiar with the matter. Goldman Sachs said in a recent memo that its policy prohibits staff from participating in event-based contracts linked to financial markets and political events that could create real or perceived conflicts of interest with the bank, its clients or the broader financial industry, a source with knowledge of the matter said. Prediction-market platforms are exchanges that offer contracts related to a wide array of events like elections, sports and weather, similar to gambling products traditionally offered by betting platforms. Platforms such as Kalshi and Polymarket have grown rapidly in recent years, raising concerns about regulatory oversight ahead of the US midterm elections. Bloomberg News, which first reported the policy, said repeated violations could result in disciplinary action, including termination, and that employees may be required to forfeit gains from…