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THE MISAPPROPRIATION Theory is associated with insider-trading law. It is not in the statutes, but has evolved through case law since 1981. Until federal securities laws were enacted in the 1930s, it was generally not a crime for officers, directors, or controlling shareholders to trade stock in their own corporations on the basis of inside information. This is still the situation in many other countries; it is considered to be a privilege of corporate status.

Before 1980, insider trading cases were prosecuted using Section 10(b) and Rule 10b-5, which prohibits a corporate insider from buying or selling shares in her own company based on non-public information. This is the basis for the traditional or classic theory of insider trading. The Misappropriation Theory extends insider trading cases to include people, beyond these employees, who trade on information which they are under a fiduciary duty to keep confidential. Any person, not just traditional corporate insiders, with material facts has a duty to either disclose this information or refrain from trading stocks.

Nonpublic Information

Interestingly, the Misappropriation Theory began with a failure. Vincent F. Chiarella, a low-level employee at a financial printing house, was able to discern information relevant to company mergers and sales. He made investments based on the information he discovered and was convicted of securities fraud for trading on inside information. He won an appeal to the Supreme Court in 1980, with the justices ruling that he was not guilty because, not being affiliated with the company, he had no duty to other investors.

In a dissenting opinion, Chief Justice Warren E. Burger said Chiarella violated an obligation to his employer to keep its clients' secrets and had “misappropriated,” or stolen, valuable nonpublic information. Within a year, the New York federal appeals court had upheld the conviction using the new Misappropriation Theory in a case involving securities trader James M. Newman. Newman's appeal to the Supreme Court went unheard.

In 1983, Anthony Materia, another low-level printing company employee, was convicted of inside trading in a civil suit brought by the Securities and Exchange Commission (SEC), under circumstances similar to those of Chiarella's case. A fiduciary duty to refrain from trading or providing information to others was found, in that doing those things would damage his employer's reputation and business. The court found that this duty was sufficient, even though the employer was not in any way involved with the securities that were bought or sold.

R. Foster Winans wrote a financial column in the Wall Street Journal which often affected the stock price of companies mentioned. In 1983 and 1984, Winans (and other brokers he told about the column contents) traded stocks in companies mentioned prior to the columns being published. He was fired from this action and for breaking conflictof-interest rules, and was convicted of securities fraud using the Misappropriation Theory. The mail and wire fraud convictions were upheld by the U.S. Supreme Court in November 1987. However, the court split evenly on the securities fraud conviction. Because of the even split, this case will not set legal precedent but did lead many to believe the SEC needed to produce a clearer definition of insider trading. There was no tie-break vote because the court had one vacancy at the time.

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