Any person who violates any provision of this chapter or the rules or regulations thereunder by purchasing or selling a security while in possession of material, nonpublic information shall be liable in an action in any court of competent jurisdiction to any person who, contemporaneously with the purchase or sale of securities that is the subject of such violation, has purchased (where such violation is based on a sale of securities) or sold (where such violation is based on a purchase of securities) securities of the same class.
The total amount of damages imposed against any person under subsection (a) shall be diminished by the amounts, if any, that such person may be required to disgorge, pursuant to a court order obtained at the instance of the Commission, in a proceeding brought under section 78u(d) of this title relating to the same transaction or transactions.
Any person who violates any provision of this chapter or the rules or regulations thereunder by communicating material, nonpublic information shall be jointly and severally liable under subsection (a) with, and to the same extent as, any person or persons liable under subsection (a) to whom the communication was directed.
Nothing in this section shall be construed to limit or condition the right of any person to bring an action to enforce a requirement of this chapter or the availability of any cause of action implied from a provision of this chapter.
This section shall not be construed to bar or limit in any manner any action by the Commission or the Attorney General under any other provision of this chapter, nor shall it bar or limit in any manner any action to recover penalties, or to seek any other order regarding penalties.