Goldman Sachs (NYSE: GS) and Morgan Stanley (NYSE: MS), leading U.S. investment banking firms, are reportedly instituting a ban on employees engaging in trading on prediction markets to mitigate potential conflicts of interest.

Reports suggest that Goldman Sachs is advising employees to refrain from trading in financial and political derivatives on platforms such as Kalshi and Polymarket, cautioning that individuals who repeatedly violate this policy may face disciplinary measures, which could include termination and the forfeiture of any illicit earnings from prediction market transactions.
A confidential source informed Reuters that Morgan Stanley’s code of conduct includes specific clauses regarding prediction markets alongside other financial and trading regulations.
The announcement regarding the bans from these two Wall Street giants comes just a few months after it was revealed that JPMorgan is contemplating the introduction of initial guidelines. CNBC mentioned earlier today that Bank of America is nearing the completion of its own prediction market regulations for staff.
Understanding the Rationale Behind Goldman and Morgan Stanley’s Bans
The decisions made by Goldman Sachs and Morgan Stanley could be welcomed by companies like Kalshi and Polymarket as they strive to clamp down on various forms of insider trading, aiming to eliminate unethical behavior and foster public trust.
These banking prohibitions are reasonable, given that many employees, especially in investment banking, frequently encounter sensitive, non-public information. For instance, a Morgan Stanley banker involved in a popular initial public offering (IPO) might have knowledge of the precise size of that transaction while a prediction market is offering contracts on that very subject.
Preventing Wall Street professionals from engaging in trading contracts related to IPOs, mergers and acquisitions, and other corporate events where they possess insider knowledge could, in fact, enhance the credibility of prediction markets. Operators are eager to expand beyond just sports derivatives, and increasing engagement from professional traders presents a promising avenue for growth. Traders seek advantages, but the market must avoid becoming a lawless environment.
Sports Trading Remains Permitted
In a potentially comforting development for some Goldman employees, the bank has confirmed that staff can continue trading entertainment and sports event contracts on prediction markets. This allows them to participate in World Cup derivatives or bets on award ceremonies.
In related news about prediction market restrictions, Arizona Governor Katie Hobbs (D) signed an executive order on Wednesday banning public officials and their staff from using their positions for personal financial benefits in prediction markets. This action aligns Arizona with several other states that have implemented similar restrictions.
“Arizonans deserve a state government that serves them, rather than one where insiders exploit their positions for personal gain,” Hobbs stated in a press release. “Public service is a privilege, and we will not stand for anyone abusing that privilege for personal profit.”

