Mayra Rodriguez Valladares, an independent New York-based risk-management expert and a supporter of Basel’s new push, says: “It will be very difficult to provide standardization in the banking book but banks need to be more transparent about their interest rate exposures. They publish very little, if at all, about the amount of assets in the banking book that fall under different maturity buckets, the stability of customer deposits by time-horizons, nor do they explain the models they use to manage interest-rate risk. By contrast, exposures in the trading book are now disproportionately more transparent than the banking book.”