This final rule revises the requirements imposed on national banks pursuant to the OCC's short-term investment fund (STIF) rule (STIF Rule). Regulations governing Federal savings associations (FSAs) require compliance with the national bank STIF Rule. The final rule adds safeguards designed to address the risk of loss to a STIF's principal, including measures governing the nature of a STIF's investments, ongoing monitoring of its mark-to-market value and forecasting of potential changes in its mark-to-market value under adverse market conditions, greater transparency and regulatory reporting about a STIF's holdings, and procedures to protect fiduciary accounts from undue dilution of their participating interests in the event that the STIF loses the ability to maintain a stable net asset value (NAV).