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Pretty inaccurate. https://www.investopedia.com/terms/o/otc.asp ... Forex, CFDs etc are all OTC. Bitfinex has an OTC offering for larger clients. Forex is a trillion dollar a day industry, those trades aren't being made "at the water cooler" :)

By CFD do you mean contract for difference?

Preach it!! Stocks of course are traded OTC as well.

I see what you mean and stand corrected. :)