Quote from SomeYoungGuy:
I'm hopelessly naive here, but do I have counterparty risk trading gold and wheat futures sitting here in my underwear? Or is this only a worry for some dark-pool international trading consortium that I'm not a part of?
If the contracts you are trading are CME Gold (Ticker Symbol GC) and CME Wheat (Ticker Symbol W) then your counterparty risk is negligible. Why, because of the clearing house structure at the CME. See
http://www.cmegroup.com/clearing/cme-clearing-overview/safeguards.html
and
http://www.cmegroup.com/clearing/files/financialsafeguards.pdf
Let's look at an example. If you Buy 1 GC contract through Interactive Brokers (IB) and a speculator in China, let's call him Mao, shorted that contract to you through his futures account at Merrill Lynch (ML), technically he is not your counter party. Instead both Interactive Brokers and Merrill Lynch are members of the clearing house and the clearing house serves as counter party to all trades. In other words, the clearing house serves as seller to all buyers and buyer to all sellers. So, because of your trade, IB is Long 1 GC held in your account at IB. ML is Short 1 GC held in Mao's account at ML. The Clearing House is Short 1 GC vs the Long 1 held at IB. The clearing house is also Long 1 GC vs the Short 1 held at ML.
So, to recap IB is Long 1 GC, ML is Short 1 GC and the clearing house is both Short 1 GC and Long 1 GC (i.e. net flat). So the counter party to the 1 Long contract in your account at IB is the Clearing House. Margin requirements and daily mark-to-market help to minimize overall counter party risk in the GC futures market as a whole.
You have 2 potential concerns (both negligible in the vast majority of cases). The counter party risk you have with the CME clearing house (currently, negligible in my opinion). The other concern is that IB properly credits the 1 Long GC to your account and not someone else's account at IB. Trades can be erroneously booked to the wrong account on occasion, so you should verify that what you think your position is corresponds to what your broker thinks your position is. I'd verify your position at least once a day. But in general, that is not a problem either and where it is your broker can rebook the trade properly.
This is my understanding of the underlying functioning of CME exchange traded futures. If I have made any errors, please point them out so that everyone that reads this thread will have correct information. IMO, The clearing house structure is an advantage which minimizes counter party risk over other markets without a Clearing House. Whether a counterparty risk is large or small all depends on who the counterparty is and that counterparty's financial condition. If the CME Clearing House is my counter party, right now I'd say my counter party risk is negligible. As for risk of other counter parties, that is for each trader to assess.