Success has gone to the head of the Securities and Exchange Commission, and after slapping $242 million in fines on five specialist firms that handle trading on the New York Stock Exchange two years ago, the agency now has set its sights on not only the American Stock Exchange but exchanges in Boston, Chicago and Philadelphia, among others. TheStreet.com reports that in addition to focusing on the types of trading practices typical on the Big Board, the SEC will turn its attention to options-trading, which is a mainstay of the smaller exchanges. According to TheStreet.com, any fines imposed over irregularities by the firms operating on the regional exchanges likely will be considerably less than those paid by the ones involved in the NYSE investigation since most of the regional firms are small.