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vestor. See App. 85, 148. O'Hagan also purchased, in September 1988, some 5,000 shares of Pillsbury common stock, at a price just under $39 per share. When Grand Met announced its tender offer in October, the price of Pillsbury stock rose to nearly $60 per share. O'Hagan then sold his Pillsbury call options and common stock, making a profit of more than $4.3 million.

The Securities and Exchange Commission (SEC or Commission) initiated an investigation into O'Hagan's transactions, culminating in a 57-count indictment. The indictment alleged that O'Hagan defrauded his law firm and its client, Grand Met, by using for his own trading purposes material, nonpublic information regarding Grand Met's planned tender offer. Id., at 8.1 According to the indictment, O'Hagan used the profits he gained through this trading to conceal his previous embezzlement and conversion of unrelated client trust funds. Id., at 10.2 O'Hagan was charged with 20 counts of mail fraud, in violation of 18 U. S. C. § 1341; 17 counts of securities fraud, in violation of § 10(b) of the Securities Exchange Act of 1934 (Exchange Act), 48 Stat. 891, 15 U. S. C. § 78j(b), and SEC Rule 10b-5, 17 CFR § 240.10b-5

1 As evidence that O'Hagan traded on the basis of nonpublic information misappropriated from his law firm, the Government relied on a conversation between O'Hagan and the Dorsey & Whitney partner heading the firm's Grand Met representation. That conversation allegedly took place shortly before August 26, 1988. See Brief for United States 4. O'Hagan urges that the Government's evidence does not show he traded on the basis of nonpublic information. O'Hagan points to news reports on August 18 and 22, 1988, that Grand Met was interested in acquiring Pillsbury, and to an earlier, August 12, 1988, news report that Grand Met had put up its hotel chain for auction to raise funds for an acquisition. See Brief for Respondent 4 (citing App. 73-74, 78-80). O'Hagan's challenge to the sufficiency of the evidence remains open for consideration on remand.

2 O'Hagan was convicted of theft in state court, sentenced to 30 months' imprisonment, and fined. See State v. O'Hagan, 474 N. W. 2d 613, 615, 623 (Minn. App. 1991). The Supreme Court of Minnesota disbarred O'Hagan from the practice of law. See In re O'Hagan, 450 N. W. 2d 571 (1990).

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(1996); 17 counts of fraudulent trading in connection with a tender offer, in violation of § 14(e) of the Exchange Act, 15 U. S. C. § 78n(e), and SEC Rule 14e-3(a), 17 CFR §240.14e3(a) (1996); and 3 counts of violating federal money laundering statutes, 18 U. S. C. §§ 1956(a)(1)(B)(i), 1957. See App. 13-24. A jury convicted O'Hagan on all 57 counts, and he was sentenced to a 41-month term of imprisonment.

A divided panel of the Court of Appeals for the Eighth Circuit reversed all of O'Hagan's convictions. 92 F.3d 612 (1996). Liability under § 10(b) and Rule 10b-5, the Eighth Circuit held, may not be grounded on the "misappropriation theory" of securities fraud on which the prosecution relied. Id., at 622. The Court of Appeals also held that Rule 14e3(a)—which prohibits trading while in possession of material, nonpublic information relating to a tender offer-exceeds the SEC's §14(e) rulemaking authority because the Rule contains no breach of fiduciary duty requirement. Id., at 627. The Eighth Circuit further concluded that O'Hagan's mail fraud and money laundering convictions rested on violations of the securities laws, and therefore could not stand once the securities fraud convictions were reversed. Id., at 627-628. Judge Fagg, dissenting, stated that he would recognize and enforce the misappropriation theory, and would hold that the SEC did not exceed its rulemaking authority when it adopted Rule 14e-3(a) without requiring proof of a breach of fiduciary duty. Id., at 628.

Decisions of the Courts of Appeals are in conflict on the propriety of the misappropriation theory under § 10(b) and Rule 10b-5, see infra this page and 650, and n. 3, and on the legitimacy of Rule 14e-3(a) under § 14(e), see infra, at 669670. We granted certiorari, 519 U. S. 1087 (1997), and now reverse the Eighth Circuit's judgment.

II

We address first the Court of Appeals' reversal of O'Hagan's convictions under § 10(b) and Rule 10b-5. Following

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the Fourth Circuit's lead, see United States v. Bryan, 58 F. 3d 933, 943-959 (1995), the Eighth Circuit rejected the misappropriation theory as a basis for § 10(b) liability. We hold, in accord with several other Courts of Appeals,3 that criminal liability under § 10(b) may be predicated on the misappropriation theory.4

A

In pertinent part, § 10(b) of the Exchange Act provides:

"It shall be unlawful for any person, directly or indirectly, by the use of any means or instrumentality of interstate commerce or of the mails, or of any facility of any national securities exchange—

"(b) To use or employ, in connection with the purchase or sale of any security registered on a national securities exchange or any security not so registered, any manipulative or deceptive device or contrivance in contravention of such rules and regulations as the [Securities and Exchange] Commission may prescribe as necessary or appropriate in the public interest or for the protection of investors." 15 U. S. C. § 78j(b).

3 See, e. g., United States v. Chestman, 947 F. 2d 551, 566 (CA2 1991) (en banc), cert. denied, 503 U. S. 1004 (1992); SEC v. Cherif, 933 F. 2d 403, 410 (CA7 1991), cert. denied, 502 U. S. 1071 (1992); SEC v. Clark, 915 F. 2d 439, 453 (CA9 1990).

4 Twice before we have been presented with the question whether criminal liability for violation of § 10(b) may be based on a misappropriation theory. In Chiarella v. United States, 445 U. S. 222, 235-237 (1980), the jury had received no misappropriation theory instructions, so we declined to address the question. See infra, at 661. In Carpenter v. United States, 484 U. S. 19, 24 (1987), the Court divided evenly on whether, under the circumstances of that case, convictions resting on the misappropriation theory should be affirmed. See Aldave, The Misappropriation Theory: Carpenter and Its Aftermath, 49 Ohio St. L. J. 373, 375 (1988) (observing that "Carpenter was, by any reckoning, an unusual case," for the information there misappropriated belonged not to a company preparing to engage in securities transactions, e. g., a bidder in a corporate acquisition, but to the Wall Street Journal).

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The statute thus proscribes (1) using any deceptive device (2) in connection with the purchase or sale of securities, in contravention of rules prescribed by the Commission. The provision, as written, does not confine its coverage to deception of a purchaser or seller of securities, see United States v. Newman, 664 F. 2d 12, 17 (CA2 1981); rather, the statute reaches any deceptive device used "in connection with the purchase or sale of any security."

Pursuant to its § 10(b) rulemaking authority, the Commission has adopted Rule 10b-5, which, as relevant here, provides:

"It shall be unlawful for any person, directly or indirectly, by the use of any means or instrumentality of interstate commerce, or of the mails or of any facility of any national securities exchange,

"(a) To employ any device, scheme, or artifice to defraud, [or]

"(c) To engage in any act, practice, or course of business which operates or would operate as a fraud or deceit upon any person,

"in connection with the purchase or sale of any security." 17 CFR § 240.10b-5 (1996).

Liability under Rule 10b-5, our precedent indicates, does not extend beyond conduct encompassed by § 10(b)'s prohibition. See Ernst & Ernst v. Hochfelder, 425 U. S. 185, 214 (1976) (scope of Rule 10b-5 cannot exceed power Congress granted Commission under § 10(b)); see also Central Bank of Denver, N. A. v. First Interstate Bank of Denver, N. A., 511 U. S. 164, 173 (1994) ("We have refused to allow [private] 10b-5 challenges to conduct not prohibited by the text of the statute.").

Under the "traditional" or "classical theory" of insider trading liability, § 10(b) and Rule 10b-5 are violated when a corporate insider trades in the securities of his corporation

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on the basis of material, nonpublic information. Trading on such information qualifies as a "deceptive device" under § 10(b), we have affirmed, because "a relationship of trust and confidence [exists] between the shareholders of a corporation and those insiders who have obtained confidential information by reason of their position with that corporation." Chiarella v. United States, 445 U. S. 222, 228 (1980). That relationship, we recognized, “gives rise to a duty to disclose [or to abstain from trading] because of the 'necessity of preventing a corporate insider from . . . tak[ing] unfair advantage of . . . uninformed . . . stockholders."" Id., at 228-229 (citation omitted). The classical theory applies not only to officers, directors, and other permanent insiders of a corporation, but also to attorneys, accountants, consultants, and others who temporarily become fiduciaries of a corporation. See Dirks v. SEC, 463 U. S. 646, 655, n. 14 (1983).

The "misappropriation theory" holds that a person commits fraud "in connection with" a securities transaction, and thereby violates § 10(b) and Rule 10b-5, when he misappropriates confidential information for securities trading purposes, in breach of a duty owed to the source of the information. See Brief for United States 14. Under this theory, a fiduciary's undisclosed, self-serving use of a principal's information to purchase or sell securities, in breach of a duty of loyalty and confidentiality, defrauds the principal of the exclusive use of that information. In lieu of premising liability on a fiduciary relationship between company insider and purchaser or seller of the company's stock, the misappropriation theory premises liability on a fiduciary-turned-trader's deception of those who entrusted him with access to confidential information.

The two theories are complementary, each addressing efforts to capitalize on nonpublic information through the purchase or sale of securities. The classical theory targets a corporate insider's breach of duty to shareholders with whom the insider transacts; the misappropriation theory outlaws