WASHINGTON, Oct 30 (Reuters) - U.S. securities regulators charged the former executive of a private investment firm and six of his relatives and friends on Friday with insider trading in the securities of Acxiom Corp (ACXM.O).

The Securities and Exchange Commission alleges that Chen Tang, the former CFO of a private equity fund, his friends and relatives reaped more than $8 million from using nonpublic material information to trade Acxiom