In the wake of sharp increases in commercial bank borrowing from the Federal Home Loan Bank system in order to keep up with new international bank-liquidity rules, the Federal Housing Finance Agency should be more transparent in reporting FHLBank advances, according to the agency’s official watchdog. The FHFA’s Office of Inspector General noted in an audit released Wednesday that FHLBank system advances have been increasing, reaching $492 billion by year-end 2013. The growth in advances has been driven primarily by the four largest members of the system – JPMorgan Chase, Bank of America, Citigroup and Wells Fargo.