Income documentation and other standards that have been in place since Fannie Mae entered conservatorship in 2008 will apply to the company’s new 3 percent downpayment product, and loan assessment by a private mortgage insurer will be crucial, according to a company spokesman. The spokesman said details will be announced shortly. Fannie Mae is working with the Federal Housing Finance Agency to design the government-sponsored enterprise’s revamped 97 percent loan-to-value product. Sources said previous requirements for a standard 97 LTV product, which Fannie offered until November 2013, are being considered. The FHFA announced...