The Federal Housing Finance Agency appears to be all alone – for now – in its effort to prevent nonbanks from gaining access to the Federal Home Loan Bank system by using a captive insurance affiliate. The proposal would also change FHLBank membership rules for depository institutions. But already the proposed ban – issued for a 60-day comment period early last week – is coming under heavy fire from different factions of the mortgage industry, including the Council of Federal Home Loan Banks, real estate investment trusts and private-equity firms that own REIT stock. David Jeffers, executive vice president for the Council, said “widespread calls” for the comment period to be extended are...