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Key Takeaways
- OCC becomes the central counterparty to accepted trades between clearing members.
- Exchanges execute trades, brokers maintain customer accounts and clearing members carry obligations to OCC.
- OCC administers clearing, settlement, exercise and assignment.
- OCC allocates exercise notices to clearing members; receiving firms allocate assignments to eligible short accounts.
- Contract memos and cleared open-interest records connect the trade ticket with the position that remains.
What is the Options Clearing Corporation (OCC)?
The Options Clearing Corporation (OCC) is the central counterparty that clears, settles, issues and guarantees obligations for US exchange-listed options. It stands between the clearing members on each accepted trade and later administers exercise, assignment and expiration for the resulting positions.
An exchange matches the trade, a broker maintains the customer account, and clearing members carry obligations to OCC.
How does OCC clearing work?
When OCC accepts the trade, it becomes the counterparty to both clearing sides. This process, called novation, supports a common clearing framework across participating exchanges.
OCC’s membership standards, margin, clearing fund and default-management resources support contract performance. Customer buying power is determined through the broker’s account requirements.
Formula
After novation: option buyer ↔ OCC ↔ option seller, through their respective clearing members- OCC becomes the central counterparty to accepted trades rather than leaving the original counterparties directly exposed to each other.
- Customer relationships remain with brokerage firms, which clear directly or through another clearing member.
OCC clearing example: a 500-contract opening trade
A customer buys to open 500 standard calls at $2.00 from a seller opening 500 short calls. The exchange matches the trade and OCC accepts it for clearing. For this example, neither side has an offsetting position in the series.
- Premium value = 500 × $2.00 × 100 = $100,000
- Long open position = 500 contracts at the buyer’s clearing side
- Corresponding short open position = 500 contracts at the seller’s clearing side
OCC novates the accepted trade and stands between the clearing members, processes premium and positions, and later administers any closing, exercise, assignment, or expiration activity.
The opening trade establishes 500 long contracts and 500 corresponding short contracts. Open interest counts the matched contracts once: 500, rather than adding the two sides to reach 1,000. Subsequent closing, exercise and expiration activity changes the remaining positions.
How OCC handles exercise and assignment
Exercise instructions travel from the customer through the broker and clearing member. OCC allocates notices to clearing members holding eligible short positions. The receiving firm then assigns eligible accounts using its allocation procedure.
For the account’s exercise instructions, use the broker’s deadline. For an adjusted contract, use OCC’s Information Memo to identify the shares, cash and other property transferred.
How traders use OCC records
Compare open interest with options flow to connect outstanding positions with session activity. Match the contract terms, exercise date and deliverable before mapping the position’s payoff.
Limitations of OCC clearing
- OCC’s guarantee covers contract performance between clearing members, and price risk stays with the position. The buyer of the 500 calls loses the full $100,000 premium when they expire worthless.
- Retail traders work through a broker. Instructions, deadlines and buying power run through the broker and its clearing member, so the broker’s exercise cutoff is the deadline that counts.
- Assignment runs in two steps: OCC allocates notices to clearing members, and each firm picks accounts under its own disclosed method. Check your broker’s method before writing options.
- Price comes from the exchange, where orders meet and trades execute. OCC takes the trade after execution.
Bottom line
The Options Clearing Corporation sits between the clearing members on every cleared US listed option, supports contract performance, and runs exercise and assignment. Know where your broker and its clearing member fit in that chain, and use OCC memos and open-interest records to confirm contract terms and the positions that remain.
Clear answers
Frequently Asked Questions
Sources and Further Reading
- OCC: What Is OCC?
- OCC: Clearing and Central Counterparty Services
- OCC: Exchange-Listed Options Ecosystem Primer
How entries are sourced, calculated and updated: editorial methodology.