Board of Governors of the Federal Reserve System (US), 79) Over the Past Three Months, How Has the Duration and Persistence of Mark and Collateral Disputes Relating to Lending Against Each of the Following Collateral Types Changed?| F. Cmbs. | Answer Type: Remained Basically Unchanged [SFQ79FRBUNR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/SFQ79FRBUNR, .