Title 15 › CHAPTER 2B — SECURITIES EXCHANGES › § 78k
Members of national stock exchanges must not trade on the exchange for their own account, for accounts of people tied to them, or for accounts they control, unless a specific exception applies. Allowed exceptions include acting as a market maker or odd-lot dealer, handling stabilizing trades for a new distribution, doing genuine arbitrage or hedging trades (including certain merger or takeover deals), trading for individual people or their estates or personal trusts, correcting mistakes, certain trades by firms that mainly underwrite and sell securities if done under SEC rules that protect other customers, trades for accounts when the member got clear authorization and gives yearly disclosure about their pay, and any other kinds of trades the SEC says are OK. The SEC can make more rules to limit or ban on-exchange or off-exchange trades by members, brokers, or dealers for their own or related accounts. Rules in paragraph (1) did not apply to members who were active on February 1, 1978 until February 1, 1979, but the SEC could still act earlier under other rules. Exchanges may register odd-lot dealers and specialists; specialists must not share order information that others do not have and may be required to disclose orders to all members. If a person is both broker and dealer and helped sell a new issue, they must not extend or arrange credit to a customer for that security within 30 days, with limited exceptions for delayed full payment (35 days for most delayed deliveries, 180 days for certain mortgage or small-business securities). Brokers-dealers must tell customers in writing at or before the trade whether they are acting for themselves, for the customer, or for someone else.
Full Legal Text
Commerce and Trade, Source: USLM XML via OLRC
Legislative History
Reference
Citation
15 U.S.C. § 78k
Title 15, Commerce and Trade
Last Updated
Sep 23, 2026
Release point: 119-110