Bank of America and its acquired headache, Countrywide, accounted for the biggest chunk of mortgage repurchases from the government-sponsored enterprises during the first half of the year, but the focus shifted to different lenders during the second quarter. A new Inside Mortgage Trends analysis of repurchase disclosures made by Fannie Mae and Freddie Mac shows that BofA repurchased $8.73 billion in mortgages – most of them originated by Countrywide – during the first six months of 2013 ... [Includes one data chart]