Section 270.10b-1 - Definition of regular broker or dealerThe term regular broker or dealer of an investment company shall mean:
(a) One of the ten brokers or dealers that received the greatest dollar amount of brokerage commissions by virtue of direct or indirect participation in the company's portfolio transactions during the company's most recent fiscal year;(b) One of the ten brokers or dealers that engaged as principal in the largest dollar amount of portfolio transactions of the investment company during the company's most recent fiscal year; or(c) One of the ten brokers or dealers that sold the largest dollar amount of securities of the investment company during the company's most recent fiscal year.49 FR 40572, Oct. 17, 1984