Consumer Price Index (CPI-U)

Saver Token tracks the US Consumer Price Index for all urban consumers.The data is seasonally adjusted.

https://www.quandl.com/data/FRED/CPIAUCSL-Consumer-Price-Index-for-All-Urban-Consumers-All-Items

Data for the previous month is published on around the 10th of the following month.  For example, data ending 1st March 2019 is published by the Department of Labor Statistics on 10th April.

Some people say the CPI-U understates inflation.  Others say it overstates inflation.  The graph shows that by the way inflation took off as soon as the United States left the gold standard in 1971 that it is certainly measuring something useful.

Four thousand years of using gold as a stable basis of exchange has shown that the stability of value does not have to be perfect for it to work.  The same is true of the CPI-U.  It is a good enough measure of the depreciation of the US dollar to form an effective benchmark for stable money.