Despite increased activity in the Fannie Mae and Freddie Mac refinance programs for underwater borrowers during the second quarter of 2012, total refi originations declined by 4.8 percent from the first three months of the year, according to a new Inside Mortgage Finance analysis and ranking. Refinance activity still accounted for 68.1 percent of originations during the most recent quarter, but that was down from 75.3 percent in the first three months of the year. Partly offsetting the drop in refi business was a 35.8 percent increase in purchase-mortgage originations, which rose to an estimated $129.0 billion in the second quarter. But compared to the first half of 2011, purchase-mortgage lending was down 1.3 percent as of the midway point this year. Refinance originations appear to be climbing in the third quarter. Data on Fannie and Freddie securitization activity in July and August suggest that total refi business at the government-sponsored enterprises is...[Includes four data charts]