Here is the calculation of the BEI (using FRED published calculation T5YIE)
Any date the realized CPI is less than the BEI, then Nominals won over the next 5 years.
Here is the calculation of the BEI (using FRED published calculation T5YIE)
Any date the realized CPI is less than the BEI, then Nominals won over the next 5 years.