Clearinghouse

A clearinghouse sits between the two sides of every trade and guarantees that both get what they agreed to, the buyer gets the securities and the seller gets paid, even if the other party defaults before the trade settles. Once a trade is matched, the clearinghouse effectively becomes the buyer to every seller and the seller to every buyer, which removes the need for each investor to worry about the creditworthiness of whoever happened to be on the other side of their trade.

This role matters because markets need to keep functioning even when individual participants fail. If a large trading firm collapsed in the middle of settling thousands of trades, a clearinghouse absorbs that risk instead of letting it cascade through the market. Clearinghouses manage this exposure by requiring members to post margin and contribute to shared default funds, and by monitoring positions in real time.

Different markets use different clearinghouses. In the United States, most stock trades are cleared through the Depository Trust & Clearing Corporation, while futures and options on futures are typically cleared by the exchange's own clearing arm, such as CME Clearing. Without this layer, every trade would carry direct counterparty risk, and settlement would slow down considerably, since each party would need to independently verify the other side's ability to pay.