Wells Fargo ranked as the top originator of purchase-money mortgages in 2005, pulling in a hefty 62.1 percent of its business for the year in lending to help borrowers buy a house. That was significantly higher than the estimated 46.2 percent share of total originations that finance home purchases last year, according to Inside Mortgage Finance estimates. One factor that pushed Wells’ purchase financing share higher is that the company fully accounts for all its… [One data table included]