Cite as: 521 U. S. 642 (1997)
Opinion of the Court
(1958) (agent's disclosure obligation regarding use of confidential information).6
The misappropriation theory advanced by the Government is consistent with Santa Fe Industries, Inc. v. Green, 430 U. S. 462 (1977), a decision underscoring that § 10(b) is not an all-purpose breach of fiduciary duty ban; rather, it trains on conduct involving manipulation or deception. See id., at 473-476. In contrast to the Government's allegations in this case, in Santa Fe Industries, all pertinent facts were disclosed by the persons charged with violating § 10(b) and Rule 10b-5, see id., at 474; therefore, there was no deception through nondisclosure to which liability under those provisions could attach, see id., at 476. Similarly, full disclosure forecloses liability under the misappropriation theory: Because the deception essential to the misappropriation theory involves feigning fidelity to the source of information, if the fiduciary discloses to the source that he plans to trade on the nonpublic information, there is no "deceptive device" and thus no § 10(b) violation—although the fiduciary-turned-trader may remain liable under state law for breach of a duty of loyalty.7
We turn next to the § 10(b) requirement that the misappropriator's deceptive use of information be "in connection with
6 Under the misappropriation theory urged in this case, the disclosure obligation runs to the source of the information, here, Dorsey & Whitney and Grand Met. Chief Justice Burger, dissenting in Chiarella, advanced a broader reading of § 10(b) and Rule 10b-5; the disclosure obligation, as he envisioned it, ran to those with whom the misappropriator trades. 445 U. S., at 240 ("a person who has misappropriated nonpublic information has an absolute duty to disclose that information or to refrain from trading"); see also id., at 243, n. 4. The Government does not propose that we adopt a misappropriation theory of that breadth.
7 Where, however, a person trading on the basis of material, nonpublic information owes a duty of loyalty and confidentiality to two entities or persons—for example, a law firm and its client—but makes disclosure to only one, the trader may still be liable under the misappropriation theory.
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