Despite increasingly numerous regulatory hurdles and growing competition from the Alternative A market, the lively subprime mortgage securitization business continues to boom in 2005. According to a new ranking and analysis by Inside MBS & ABS, a record $136.21 billion of subprime MBS were issued during the second quarter of this year. The market had appeared to reach its high-water mark back in the third quarter of 2004, when an unprecedented $125.98 billion of subprime… [One data table included]