Exchanges and the clearing house
Lesson 2 · about 9 min
Every futures contract lives on exactly one exchange. The exchange writes the specification, lists the months, runs the matching engine, sets the margin schedule and, through its clearing house, guarantees that the winning side of every trade gets paid. Knowing which exchange a contract belongs to tells you its hours, its fee schedule, its data subscription and which set of rules applies when something breaks.
The exchanges you will actually meet
| Exchange | Group | What it lists | Contracts you will see |
|---|---|---|---|
| CME | CME Group | Equity indices, currencies, interest rate futures on short rates | ES, MES, NQ, MNQ, RTY, M2K, 6E, 6J, 6B |
| CBOT | CME Group | Treasury bonds and notes, grains | ZB, ZN, ZF, YM, MYM, ZC, ZS, ZW |
| NYMEX | CME Group | Energy | CL, MCL, NG, RB, HO |
| COMEX | CME Group | Metals | GC, MGC, SI, SIL, HG |
| ICE | ICE | Brent crude, softs, dollar index, some European and UK products | Brent, KC (coffee), SB (sugar), CT, DX |
| Eurex | Deutsche Börse | European equity indices and government bonds | FDAX, FDXM, FESX, FGBL (Bund) |
Four of those six are divisions of CME Group, and they all trade on the same electronic platform, Globex. In practice a US retail futures account is mostly a Globex account with ICE and Eurex available as add-ons, each with its own data fee.
Historically these were separate pits in Chicago and New York. The names survive because the contract specifications, symbols and fee schedules are still organized by division. When a broker's fee table says "CME, CBOT, NYMEX, COMEX" it is listing four groups of contracts, not four places you have to go.
What the clearing house does
When you buy one ES contract from someone, you do not have a contract with that person. The trade is immediately novated: the clearing house becomes the seller to you and the buyer to them. From then on, your counterparty is the clearing house, and theirs is too.
This removes the question that haunts private forward contracts, which is whether the other side will pay. The clearing house guarantees performance, and it protects itself in three ways:
- Margin. Every open position must be backed by a performance bond, collected from you by your broker and from your broker by the clearing house.
- Daily mark-to-market. At the daily settlement price, every position's gain or loss is computed and cash moves. A losing position cannot accumulate a large unpaid debt because it is paid down every day.
- The default waterfall. If a member firm fails, its margin is used first, then a guarantee fund contributed by all members, then the clearing house's own capital.
For you the practical consequence is that "who is on the other side" is never a credit question in futures. It is always the clearing house, and the price you got is the price you get.
Your broker in the chain
You do not deal with the exchange directly. The chain is:
you → introducing broker or futures commission merchant (FCM) → clearing member → clearing house
The FCM is the firm that holds your money in a segregated customer account, collects your margin, sends your orders to Globex and liquidates you if your account falls below its rules. Two important points:
- Exchange margin is a floor, not a ceiling. The clearing house sets a minimum margin per contract. Your FCM may require more, and for intraday positions may allow less at its own risk. Module 3 covers this.
- The FCM's risk desk is the entity that closes you out. Not the exchange. Read your broker's liquidation policy before your first trade, because the rules on cut-off times and which positions get closed first are theirs.
Symbols: root, month, year
A full futures symbol has three parts:
| Part | Meaning | Example |
|---|---|---|
| Root | The product | ES |
| Month | A single letter, see Lesson 3 | Z |
| Year | One or two digits | 6 or 26 |
So ESZ6 (or ESZ26 on some platforms) is the E-mini S&P 500 expiring in December 2026. Brokers and charting platforms differ in how they write this; some prefix an exchange code, some use a dash, some use a full stop. The root and the month letter are always the same, so learn those and ignore the platform decoration.
Key idea: The exchange defines the contract and the clearing house guarantees it, but your broker is the entity that holds your cash, sets the margin you actually post, and decides when you get liquidated.
Contract sizes are set per exchange, not per asset class
The same underlying can trade on more than one exchange with different sizes. WTI crude is CL on NYMEX (1,000 barrels); Brent crude is a separate contract on ICE (also 1,000 barrels, but a different grade, delivery and expiration calendar). The DAX index trades on Eurex as FDAX at €25 per point, FDXM at €5 and FDXS at €1; there is no CME DAX contract. If you switch exchanges, re-read the spec from scratch.
Try it: Open your broker's futures fee and margin page. Find the four CME Group divisions and note (a) the exchange fee per side for MES, (b) the exchange fee per side for ES, and (c) whether ICE and Eurex products require a separate data subscription. Keep the numbers; Module 5 uses them.
Recap
- CME, CBOT, NYMEX and COMEX are divisions of CME Group and all trade on Globex; ICE and Eurex are separate.
- The clearing house is the counterparty to every trade; margin and daily settlement are how it stays solvent.
- Your FCM holds your cash, sets the margin you actually post and decides when you are liquidated.
- Symbols are root + month letter + year; platforms decorate them differently.
- Contract sizes are set per exchange, so the same underlying can have different specs on different exchanges.
See it drawn
Original diagrams for the ideas on this page. Illustrative, not real market data.