Which of the following information must be disclosed on a confirmation?

A customer confirmation must disclose whether the broker-dealer acted as principal or agent in the transaction. Trade capacity is a key disclosure because it tells the customer whether the firm executed the trade from or for its own account, or whether it acted as an intermediary for the customer. Choice C is correct. If the firm acts as agent, it generally charges a commission. If it acts as principal, it buys from or sells to the customer and may earn a markup or markdown. Choice A is incorrect because the daily trading price range is not a standard required confirmation disclosure. Choice B is incorrect because total trading volume for the security is not required on the customer confirmation. Choice D is incorrect because representative-specific compensation is not the general required confirmation disclosure stated in this question. The SIE outline includes customer confirmations, trade capacity, principal versus agency trading, commissions, markups, and books and records requirements. It also lists SEC Rule 10b-10 and FINRA Rule 2232 on customer confirmations. Reference: Section 3.1.1 Orders and Strategies; Section 3.2.4 Books and Records; SEC Rule 10b-10; FINRA Rule 2232.