Countrywide Financial ranked as the most active sponsor of non-agency MBS during the first half of 2006, capturing a 13.3 percent share of the total market with some $73.84 billion in issuance, according to the Inside Mortgage Finance MBS Database. Under the Securities and Exchange Commission’s Reg AB, an MBS or ABS sponsor is the party that “organizes and initiates” the transaction by selling assets to the actual issuing entity, which is usually created under… [One data table included]