Market structure refers to the rules, institutions, and oversight mechanisms that govern how financial assets are traded. In the United States, the SEC oversees securities markets (stocks, bonds, investment funds) while the CFTC oversees commodity and derivatives markets (futures, swaps, options). When new asset classes emerge, Congress must decide which regulator has jurisdiction and what rules apply.
Market structure rules set requirements for exchanges, broker-dealers, and trading platforms. They define who can operate a marketplace, how prices are formed, what information must be disclosed to investors, and what protections exist against fraud and manipulation. These rules shape everything from how a stock trade is executed to whether a new financial product can be offered to the public.
The design of market structure has real consequences for ordinary investors. Rules about order routing, payment for order flow, and market maker obligations determine whether retail investors get fair prices or are systematically disadvantaged. When market structure breaks down — as during the 2021 GameStop episode — the rules governing who can trade, when trading can be halted, and how settlement works become front-page controversies.
Market structure determines whether financial markets work fairly for everyone or primarily benefit insiders. The rules governing how trades are executed, what information is disclosed, and who oversees the process affect anyone with a retirement account, a savings plan, or exposure to financial markets — which is most Americans.
People often think "market structure" refers to whether a market is competitive or monopolistic (the economics concept). In financial regulation, it means something different — the specific rules, institutions, and oversight mechanisms that govern how financial products are traded. It's about the plumbing of markets, not their competitive dynamics.
Market structure determines whether financial markets work fairly for everyone or primarily benefit insiders. The rules governing how trades are executed, what information is disclosed, and who oversees the process affect anyone with a retirement account, a savings plan, or exposure to financial markets — which is most Americans.
People often think "market structure" refers to whether a market is competitive or monopolistic (the economics concept). In financial regulation, it means something different — the specific rules, institutions, and oversight mechanisms that govern how financial products are traded. It's about the plumbing of markets, not their competitive dynamics.