Consumer Price Index Year over Year (CPI YOY) vs 2 Year Yield (2YY) vs Fed Funds. To even begin to arrest inflation, the Fed has to get Fed Funds above the 2YY. To break the back of inflation, the Fed must get Fed Funds above CPI YOY. Does the most recent drop in CPI YOY mean that peak inflation is already in? People forget that when inflation runs hot, so...