Conventional conforming mortgage production took the heaviest hit in new lending during the first quarter as all four corners of the single-family originations market recorded sharp declines, according to a new Inside Mortgage Finance ranking and analysis. Originations of conventional mortgages that meet conforming loan limits sank 40.0 percent from the fourth quarter of 2010, hitting an estimated $213.0 billion. The conventional conforming market still had the biggest role in the market, accounting for 65.5 percent of new originations, but a sharp drop in refinance activity hit the sector hard. Government-insured lending was also... [Includes two data charts]