Justice Brennan
delivered the opinion of the Court.
The question presented by this ease is whether the common-law
in pari delicto
defense bars a private damages action under the federal securities laws against corporate insiders and broker-dealers who fraudulently induce investors to purchase securities by misrepresenting that they are conveying material nonpublic information about the issuer.
I
The respondent investors filed this action in the United States District Court for the Northern District of California, alleging that they incurred substantial trading losses as a result of a conspiracy between Charles Lazzaro, a registered securities broker employed by the petitioner Bateman Eichler, Hill Richards, Inc. (Bateman Eichler), and Leslie Neadeau, President of T. O. N. M. Oil & Gas Exploration Corporation (TONM), to induce them to purchase large quantities of TONM over-the-counter stock by divulging false and materially incomplete information about the company on the pretext that it was accurate inside information.
Specifically, Lazzaro is alleged to have told the respondents that he personally knew TONM insiders and had learned,
inter alia,
that (a) “[v]ast amounts of gold had been discovered in Surinam, and TONM had options on thousands of acres in gold-
producing regions of Surinam”;
(b) the discovery was “not publically known, but would subsequently be announced”; (c) TONM was currently engaged in negotiations with other companies to form a joint venture for mining the Surinamese gold; and (d) when this information was made public, “TONM stock, which was then selling from $1.50 to $3.00/share, would increase in value from $10 to $15/share within a short period of time, and . . . might increase to $100/share” within a year. Complaint ¶¶ 16-17, App. 10-12.
Some of the respondents aver that they contacted Neadeau and inquired whether Laz-zaro’s tips were accurate; Neadeau stated that the information was “not public knowledge” and “would neither confirm nor deny those claims,” but allegedly advised that “Lazzaro was a very trustworthy and a good man.”
Id.
¶ 19, App. 12.
The respondents admitted in their complaint that they purchased TONM stock, much of it through Lazzaro, “on the premise that Lazzaro was privy to certain information not otherwise available to the general public.”
Id.
¶ 15, App. 10. Their shares initially increased dramatically in price, but ultimately declined to substantially below the purchase price when the joint mining venture fell through.
Id.
¶¶ 22-26, App. 13-14.
Lazzaro and Neadeau are alleged to have made the representations set forth above knowing that the representations “were untrue and/or contained only half-truths, material omissions of fact and falsehoods,”
intending that the respondents would rely thereon, and for the purpose of “influ-enc[ing] and manipulating] the price of TONM stock” so as “to profit themselves through the taking of commissions and secret profits.”
Id.
¶¶23, 30, 38, App. 13, 15-16.
The respondents contended that this scheme violated,
inter alia,
§ 10(b) of the Securities Exchange Act of 1934, 48 Stat. 891, 15 U. S. C. § 78j(b),
and Securities and Exchange Commis
sion (SEC) Rule 10b-5 promulgated thereunder, 17 CFR §240.10b-5 (1984).
They sought capital losses and lost profits, punitive damages, and costs and attorney’s fees. App. 26.
The District Court dismissed the complaint for failure to state a claim. The court reasoned that “trading on insider information is itself a violation of rule 10b-5” and that the allegations in the complaint demonstrated that the respondents themselves had “violated the particular statutory provision under which recovery is sought.” App. to Pet. for Cert. C-2. Thus, the court concluded, the respondents were
in pari delicto
with Lazzaro and Neadeau and absolutely barred from recovery.
Ibid.
The Court of Appeals for the Ninth Circuit reversed.
Berner
v.
Lazzaro,
730 F. 2d 1319 (1984). Although it
assumed that the respondents had violated the federal securities laws,
id.,
at 1324, the court nevertheless concluded that “securities professionals and corporate officers who have allegedly engaged in fraud should not be permitted to invoke the
in pari delicto
doctrine to shield themselves from the consequences of their fraudulent misrepresentation,”
id.,
at 1320. The Court of Appeals noted that this Court had sharply restricted the availability of the
in pari delicto
defense in antitrust actions, see
Perma Life Mufflers, Inc.
v.
International Parts Corp.,
392 U. S. 134 (1968), and concluded that, essentially for three reasons, there was no basis “for creating a different rule for private actions initiated under the federal securities laws,” 730 F. 2d, at 1322. First, the court reasoned that, in cases such as this, defrauded tippees are not in fact “equally responsible” for the violations they allege.
Ibid.
Second, the court believed that allowing the defense in these circumstances would be “totally incompatible with the overall aims of the securities law” because the threat of a private damages action is necessary to deter “insider-tipster[s]” from defrauding the public.
Id.,
at 1323. Finally, the court noted the availability of means other than an outright preclusion of suit to deter tippees from trading on inside information.
Id.,
at 1324, n. 3.
The lower courts have divided over the proper scope of the
in pari delicto
defense in securities litigation.
We granted certiorari. 469 U. S. 1105 (1985). We affirm.
1 — I HH
The common-law defense at issue in this case derives from the Latin,
in pari delicto potior est conditio defendentis:
“In a case of equal or mutual fault. . . the position of the [defending] party ... is the better one.”
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Justice Brennan
delivered the opinion of the Court.
The question presented by this ease is whether the common-law
in pari delicto
defense bars a private damages action under the federal securities laws against corporate insiders and broker-dealers who fraudulently induce investors to purchase securities by misrepresenting that they are conveying material nonpublic information about the issuer.
I
The respondent investors filed this action in the United States District Court for the Northern District of California, alleging that they incurred substantial trading losses as a result of a conspiracy between Charles Lazzaro, a registered securities broker employed by the petitioner Bateman Eichler, Hill Richards, Inc. (Bateman Eichler), and Leslie Neadeau, President of T. O. N. M. Oil & Gas Exploration Corporation (TONM), to induce them to purchase large quantities of TONM over-the-counter stock by divulging false and materially incomplete information about the company on the pretext that it was accurate inside information.
Specifically, Lazzaro is alleged to have told the respondents that he personally knew TONM insiders and had learned,
inter alia,
that (a) “[v]ast amounts of gold had been discovered in Surinam, and TONM had options on thousands of acres in gold-
producing regions of Surinam”;
(b) the discovery was “not publically known, but would subsequently be announced”; (c) TONM was currently engaged in negotiations with other companies to form a joint venture for mining the Surinamese gold; and (d) when this information was made public, “TONM stock, which was then selling from $1.50 to $3.00/share, would increase in value from $10 to $15/share within a short period of time, and . . . might increase to $100/share” within a year. Complaint ¶¶ 16-17, App. 10-12.
Some of the respondents aver that they contacted Neadeau and inquired whether Laz-zaro’s tips were accurate; Neadeau stated that the information was “not public knowledge” and “would neither confirm nor deny those claims,” but allegedly advised that “Lazzaro was a very trustworthy and a good man.”
Id.
¶ 19, App. 12.
The respondents admitted in their complaint that they purchased TONM stock, much of it through Lazzaro, “on the premise that Lazzaro was privy to certain information not otherwise available to the general public.”
Id.
¶ 15, App. 10. Their shares initially increased dramatically in price, but ultimately declined to substantially below the purchase price when the joint mining venture fell through.
Id.
¶¶ 22-26, App. 13-14.
Lazzaro and Neadeau are alleged to have made the representations set forth above knowing that the representations “were untrue and/or contained only half-truths, material omissions of fact and falsehoods,”
intending that the respondents would rely thereon, and for the purpose of “influ-enc[ing] and manipulating] the price of TONM stock” so as “to profit themselves through the taking of commissions and secret profits.”
Id.
¶¶23, 30, 38, App. 13, 15-16.
The respondents contended that this scheme violated,
inter alia,
§ 10(b) of the Securities Exchange Act of 1934, 48 Stat. 891, 15 U. S. C. § 78j(b),
and Securities and Exchange Commis
sion (SEC) Rule 10b-5 promulgated thereunder, 17 CFR §240.10b-5 (1984).
They sought capital losses and lost profits, punitive damages, and costs and attorney’s fees. App. 26.
The District Court dismissed the complaint for failure to state a claim. The court reasoned that “trading on insider information is itself a violation of rule 10b-5” and that the allegations in the complaint demonstrated that the respondents themselves had “violated the particular statutory provision under which recovery is sought.” App. to Pet. for Cert. C-2. Thus, the court concluded, the respondents were
in pari delicto
with Lazzaro and Neadeau and absolutely barred from recovery.
Ibid.
The Court of Appeals for the Ninth Circuit reversed.
Berner
v.
Lazzaro,
730 F. 2d 1319 (1984). Although it
assumed that the respondents had violated the federal securities laws,
id.,
at 1324, the court nevertheless concluded that “securities professionals and corporate officers who have allegedly engaged in fraud should not be permitted to invoke the
in pari delicto
doctrine to shield themselves from the consequences of their fraudulent misrepresentation,”
id.,
at 1320. The Court of Appeals noted that this Court had sharply restricted the availability of the
in pari delicto
defense in antitrust actions, see
Perma Life Mufflers, Inc.
v.
International Parts Corp.,
392 U. S. 134 (1968), and concluded that, essentially for three reasons, there was no basis “for creating a different rule for private actions initiated under the federal securities laws,” 730 F. 2d, at 1322. First, the court reasoned that, in cases such as this, defrauded tippees are not in fact “equally responsible” for the violations they allege.
Ibid.
Second, the court believed that allowing the defense in these circumstances would be “totally incompatible with the overall aims of the securities law” because the threat of a private damages action is necessary to deter “insider-tipster[s]” from defrauding the public.
Id.,
at 1323. Finally, the court noted the availability of means other than an outright preclusion of suit to deter tippees from trading on inside information.
Id.,
at 1324, n. 3.
The lower courts have divided over the proper scope of the
in pari delicto
defense in securities litigation.
We granted certiorari. 469 U. S. 1105 (1985). We affirm.
1 — I HH
The common-law defense at issue in this case derives from the Latin,
in pari delicto potior est conditio defendentis:
“In a case of equal or mutual fault. . . the position of the [defending] party ... is the better one.”
The defense is grounded on two premises: first, that courts should not lend their good offices to mediating disputes among wrongdoers;
and second, that denying judicial relief to an admitted wrongdoer is an effective means of deterring illegality.
In its classic for
mulation, the
in pari delicto
defense was narrowly limited to situations where the plaintiff truly bore at least substantially equal responsibility for his injury, because “in cases where both parties are in delicto, concurring in an illegal act, it does not always follow that they stand in pari delicto; for there may be, and often are, very different degrees in their guilt.” 1 J. Story, Equity Jurisprudence 304-305 (13th ed. 1886) (Story). Thus there might be an “inequality of condition” between the parties,
id.,
at 305, or “a confidential relationship between th[em]” that determined their “relative standing” before a court, 3 J. Pomeroy, Equity Jurisprudence §942a, p. 741 (5th ed. 1941) (Pomeroy). In addition, the public policy considerations that undergirded the
in pari delicto
defense were frequently construed as precluding the defense even where the plaintiff bore substantial fault for his injury: “[TJhere may be on the part of the court itself a necessity of supporting the public interests or public policy in many cases, however reprehensible the acts of the parties may be.” 1 Story 305. Notwithstanding these traditional limitations, many courts have given the
in pari delicto
defense a broad application to bar actions where plaintiffs simply have been involved generally in “the same sort of wrongdoing” as defendants.
Perma Life Mufflers, Inc.
v.
International Parts Corp.,
392 U. S., at 138.
In
Perma Life,
we emphasized “the inappropriateness of invoking broad common-law barriers to relief where a private suit serves important public purposes.”
Ibid.
That case involved a treble-damages action against a Midas Muffler franchisor by several of its dealers, who alleged that the franchise agreement created a conspiracy to restrain trade in violation
of the Sherman and Clayton Acts.
The lower courts barred the action on the grounds that the dealers, as parties to the agreement, were
in pari delicto
with the franchisor. In reversing that determination, the opinion for this Court emphasized that there was no indication that Congress had intended to incorporate the defense into the antitrust laws, which “are best served by insuring that the private action will be an ever-present threat to deter anyone contemplating [illegal] business behavior.”
Id.,
at 139. Accordingly, the opinion concluded that “the doctrine of
in pari delicto,
with its complex scope, contents, and effects, is not to be recognized as a defense to an antitrust action.”
Id.,
at 140. The opinion reserved the question whether a plaintiff who engaged in “truly complete involvement and participation in a monopolistic scheme” — one who “aggressively supported] and further[ed] the monopolistic scheme as a necessary part and parcel of it” — could be barred from pursuing a damages action, finding that the muffler dealers had relatively little bargaining power and that they had been coerced by the franchisor into agreeing to many of the contract’s provisions.
Ibid.
In separate opinions, five Justices agreed that the concept of “equal fault” should be narrowly defined in litigation arising under federal regulatory statutes.
“[B]ecause of the strong public interest in eliminating restraints on competition, . . . many of the refinements of moral worth demanded of plaintiffs by . . . many of the variations of
in pari delicto
should not be applicable in the antitrust field.”
Id.,
at 151 (Marshall, J., concurring in result). The five Justices concluded, however, that where a plaintiff truly bore at least substantially equal responsibility for the violation, a defense
based on such fault — whether or not denominated
in pari delicto
— should be recognized in antitrust litigation.
Bateman Eichler argues that
Perma Life
— with its emphasis on the importance of analyzing the effects that fault-based defenses would have on the enforcement of congressional goals — is of only marginal relevance to a private damages action under the federal securities laws. Specifically, Bateman Eichler observes that Congress
expressly
provided for private antitrust actions — thereby manifesting a “desire to go beyond the common law in the antitrust statute in order to provide substantial encouragement to private enforcement and to help deter anticompetitive conduct” — whereas private rights of action under § 10(b) of the Securities Exchange Act of 1934 are merely
implied
from that provision
— thereby, apparently, supporting a broader application of the
in pari delicto
defense. Brief for Petitioner 32. Bateman Eichler buttresses this argument by observing that, unlike the Sherman and Clayton Acts, the securities laws contain savings provisions directing that “[t]he rights and remedies provided by [those laws] shall be in addition to any and all other rights and remedies that may exist at law or in equity”
— again, apparently, supporting a broader scope for fault-based defenses than recognized in
Perma Life.
We disagree. Nothing in
Perma Life
suggested that public policy implications should govern only where Congress expressly provides for private remedies; the classic formulation of the
in pari delicto
doctrine itself required a careful consideration of such implications before allowing the defense. See
supra,
at 307. Moreover, we repeatedly have emphasized that implied private actions provide “a most effective weapon in the enforcement” of the securities laws and are “a necessary supplement to Commission action.”
J. I. Case Co.
v.
Borak,
377 U. S. 426, 432 (1964); see also
Blue Chip Stamps
v.
Manor Drug Stores,
421 U. S. 723, 730 (1975). In addition, we have eschewed rigid common-law barriers in construing the securities laws. See,
e. g., Herman & MacLean
v.
Huddleston,
459 U. S. 375, 388-389 (1983) (common-law doctrines are sometimes of “questionable pertinence” in applying the securities laws, which were intended “to rectify perceived deficiencies in the available common-law protections by establishing higher standards of conduct in the securities industry”);
A. C. Frost & Co.
v.
Coeur d’Alene Mines Corp.,
312 U. S. 38, 43 (1941) (rejecting the unclean-hands defense on the facts of the case because it would “seriously hinder rather than aid the real purpose” of the securities laws).
We therefore conclude that the views expressed in
Perma Life
apply with full force to implied causes of action under the federal securities laws. Accordingly, a private action for damages in these circumstances may be barred on the grounds of the plaintiff’s own culpability only where (1) as a direct result of his own actions, the plaintiff bears at least substantially equal responsibility for the violations he seeks