In J. I. Case Co. v. Borak, 377 U.S. 426, 84 S.Ct. 1555, 12 L.Ed.2d 423, the Supreme Court held that private suits for damages were impliedly authorized by the Securities Exchange Act of 1934, stating (at p. 432, 84 S.Ct. at p. 1560):
“Private enforcement of the proxy rules [of the Securities and Exchange Commission] provides a necessary supplement to Commission action. As in antitrust treble-damages litigation, the possibility of civil damages serves as a most effective weapon in the enforcement of the proxy requirements.”
This holding was recently reaffirmed in Allen v. State Board of Elections, 393 U.S. 544, 89 S.Ct. 817, 22 L.Ed.2d 1.
Using the Borak case as a springboard, in Colonial Realty Corporation v. Bache & Co., 358 F.2d 178 (2d Cir. 1966), certiorari denied, 385 U.S. 817, 87 S.Ct. 40, 17 L.Ed.2d 56, Judge Friendly noted that Stock Exchange rules can play an integral part in SEC regulation. The Court summed up this principle as follows (at p. 182):
“What emerges is that whether the courts are to imply federal civil liability for violation of exchange or dealer association rules by a member cannot be determined on the simplistic all-or-nothing basis urged by the two parties; rather, the court must look to the nature of the particular rule and its place in the regulatory scheme, with the party urging the implication of a federal liability carrying a considerably heavier burden of persuasion than when the violation is of the statute or an SEC regulation. The case for implication would be strongest when the rule imposes an explicit duty unknown to the common law.”
The jurisdictional provision of the Securities and Exchange Act of 1934 is contained in Section 27 and provides in part as follows (15 U.S.C. § 78aa):
“The district courts of the United States, and the United States courts of any Territory or other place subject to the jurisdiction of the United States shall have exclusive jurisdiction of violations of this chapter or the rules and regulations thereunder, and of all suits in equity and actions at law brought to enforce any liability or duty created by this chapter or the rules and regulations thereunder.”
There is nothing inconsistent with this Section in holding that violations of Rule 405 may be actionable as a “duty created by this chapter” inasmuch as Rule 405 was promulgated in accordance with Sections 6 and 19 of the Act, even if Rule 405 is not in itself to be considered a rule “thereunder.” See Lowenfels, “Implied Liabilities Based Upon Stock Exchange Rules,” 66 Colum.L.Rev. 12, 18-19 (1966). The touchstone for determining whether or not the violation of a particular rule is actionable should properly depend upon its design “for the direct protection of investors.” Id. at p. 29. Here one of the functions of Rule 405 is to protect the public, so that permitting a private action for its violation is entirely consistent with the purposes of the statute.
We do not decide that an alleged violation of Rule 405 is per se actionable. However, Count I pertains to the defendant’s acceptance of investments without regard for the bankrupt broker’s defalcations of investors’ funds. Such a breach of fair practice undermines the protection of investors and surely “play[s] an integral part in SEC regulation” of Exchanges and their members. Colonial Realty Corporation v. Bache & Co., supra, at p. 182. As the Supreme Court stated in Silver v. New York Stock Exchange, 373 U.S. 341, 355, 83 S.Ct. 1246, 1255, 10 L.Ed.2d 389:
“It is no accident that the Exchange’s Constitution and rules are permeated with instances of regulation of members’ relationships with nonmembers including nonmember broker-dealers. A member’s purchase of unlisted securities for itself or on behalf of its customer from a boiler-shop operation creates an obvious danger of loss to the principal in the transaction, and sale of securities to a nonmember