Bloomberg – The Securities and Exchange Commission is conducting a formal inquiry into an online gambling website’s Bitcoin-denominated stock sale after the agency signaled that such dealings may break U.S. laws. The SEC sent a letter asking MPEx, an online exchange for Bitcoin-based trading, to provide contracts and other documents relating to SatoshiDice.com, according to a copy of the request posted on the website trilema.com. Mircea Popescu, the MPEx operator to whom the letter was addressed, confirmed its receipt in an e-mail to Bloomberg News and said MPEx hasn’t broken any laws. The letter lists SatoshiDice as the topic of…