Wells Fargo and JPMorgan Chase recently launched programs to deliver low-downpayment mortgages to Fannie Mae that differ from the government-sponsored enterprises’ recent expansion into high loan-to-value financing. Both banks introduced new 97 percent LTV programs they believe are easier to use than the GSE initiatives and, for certain borrowers, a better choice than FHA financing. Wells Fargo’s “yourFirstMortgage” requires a minimum of 3 percent downpayment for fixed-rate mortgages. The company will consider FICO scores significantly lower than other similar high-LTV programs, to as low as 620, along with debt-to-income ratios up to 45 percent. Factoring in nontraditional uses of credit such as rent, utility bill payments and tuition is...