The Securities and Exchange Commission filed a civil suit charging the Internet entrepreneur with insider trading for selling shares of an Internet search company in 2004.

Amid last week’s market tumult, Mark Cuban, tackled the subject of “How to Get Rich.” His advice may not be a mood-lifter.

Buying the Cubs is the latest project for Mark Cuban, the owner of the N.B.A.’s Dallas Mavericks, but he is not alone in the expensive quest.