Justice
Blackmun, writing for the majority, first examined the underlying
policy behind the Securities Exchange Act: to protect investors against manipulation of stock prices. The
Securities and Exchange Commission promulgated Rule 10b-5 to prevent fraud and enforce the Act's requirements.
Materiality of preliminary merger discussions Blackmun reviewed the standards of materiality, including the holding in
TSC Industries, Inc. v. Northway, Inc., that "an omitted fact is material if there is a substantial likelihood that a reasonable shareholder would consider it important in deciding how to vote." This standard was then expressly adopted for § 10(b) and Rule 10b-5. The Court re-iterated that where there is a duty to disclose, management must disclose or abstain from trading. Where there is no duty to disclose, the Court will not question the timing of disclosure. But if management is under no duty to disclose and misrepresents a material fact, management may be held accountable. In other words, the Court was not concerned about the timing of disclosure, only its accuracy and completeness. The Court then went on to establish a standard for determining the materiality of merger discussions. Blackmun reviewed and rejected the
Third Circuit test that merger discussions become material only when an agreement in principle has been reached, finding that standard too "rigid" and "artificial." Blackmun also rejected the Sixth Circuit test, which held that publicly denying the existence of merger discussions makes those discussions material by virtue of denying their existence. He reasoned that it is not enough for a statement to be untrue if it is insignificant. Blackmun declined to adopt a test that hinged on a single event, holding instead that the materiality of merger discussions is always a function of the probability of the completion of the merger and the magnitude of the transaction.
Reliance and the fraud-on-the-market theory The fraud-on-the-market theory is the idea that stock prices are a function of all material information about the company and its business. It applies in open and developed securities markets, where it can be assumed that all material information is available to investors. The theory states that under these conditions, there is a causal link between any misstatement and any stock purchaser, because the misstatements defraud the entire market and thus affect the price of the stock. Therefore, a material misstatement's effect on an individual purchaser is no less significant than the effect on the entire market. The question before the court was whether this entitles an individual stock purchaser a presumption of reliance, even if the purchaser did not directly rely on the misstatements. Observing that the reality of modern securities markets is such that face-to-face transactions are rare, Justice Blackmun noted that requiring a showing of actual reliance would effectively prevent plaintiffs from ever proceeding as a class action. Also finding that investors often rely on market price, he found the rebuttable presumption of reliance (through the fraud-on-the-market theory) to be a reasonable compromise between the requirements of
Federal Rules of Civil Procedure 23 and the
securities fraud element of reliance. Blackmun further noted that both Congress's intent and recent empirical studies reflect the idea that open markets incorporate all material information into share price. The Court thereby adopted a rebuttable presumption of reliance, based on the fraud-on-the-market theory. Blackmun noted that defendants could rebut the presumption by showing that there was no link between the misstatements and plaintiff's price paid or received. The Court further noted that, should a corporation wish to maintain the confidentiality of its merger talks without denying the chance of a merger, its directors need only state that they had "no comment" regarding any potential merger. Blackmun vacated the decision of the Court of Appeals and
remanded the case. == References ==