When Dallas Mavericks owner Mark Cuban titled his most recent Blogmaverick post, “I Hate To Lose”, he was referring to his ballclub’s recent 5 game losing streak. The same mantra, however, might apply to his willingness to suffer stock losses, as The Dallas Morning News’ Dave Michaels reports the U.S. Securities & Exchange Commission has filed insider trading charges against Cuban related to a 2004 transaction.  The company in question was not Dairy Queen’s parent, Berkshire Hathaway.

The complaint alleges that Mr. Cuban avoided losses in excess of $750,000 by selling 600,000 shares he learned would be diluted by a new stock offering. The company, Mamma.com, told Mr. Cuban about the offering on the condition that he keep the information confidential.

œLess than four hours later, Mr. Cuban betrayed that trust by placing an order to sell all of his shares, said Scott W. Friestad, the SEC™s deputy director of enforcement. œIt is fundamentally unfair for someone to use access to nonpublic information to improperly gain an edge on the market.

Mr. Cuban was told about the stock offering through a phone call with Mamma.com™s chief executive on June 28, 2004, according to the SEC complaint.

Mr. Cuban œbecame very upset and angry during the conversation because the private offering would dilute existing shareholders, according the complaint.

œWell, now I™m screwed, Mr. Cuban told the executive. œI can™t sell.

But Mr. Cuban later called his Dallas broker and ordered him to sell all 600,000 shares he owned. œSell what you can tonight and just get me out the next day, he said, according to the complaint.