With the conventional conforming mortgage market gaining seasonal strength in recent months, Freddie Mac has continued to capture a growing share of business flowing to the government-sponsored enterprises. In fact, Freddie Mac’s aggressive purchases of non-agency MBS helped the company beat its rival GSE in total new business for the month of April. Freddie’s total new business – which includes mortgage securitization activity and portfolio purchases – for April was $48.54 billion, topping Fannie’s $45.27…