The volume of purchase mortgages being originated isn’t as strong as it could be because of the amount of home sales completed solely with cash, according to economists at Freddie Mac. The cash share of home sales is declining, but it remains well above historic levels. The economists projected that about 6.2 million homes will be sold this year. With the cash share of home sales around 20 percent, Freddie projects that $1.38 trillion in purchase mortgages will be originated this year. If the cash share was at the norm of 10 percent, an additional $172.0 billion in purchase mortgages would be originated in 2017, according to the government-sponsored enterprise. Before the financial crisis, about 10 percent of home sales were...