First published by Money Metals Exchange here: https://www.moneymetals.com/news/2021/12/21/producer-price-index-gold-silver-002428

The Producer Price Index (PPI) is a measure of inflation expectations by industry producers. Most investors keep an eye on the Consumer Price Index (CPI). However, the CPI gauge is not only incomplete, it is, as U.S. Global's Frank Holmes likes to say, "backward looking" …and, as Graham Summers pointed out, "gimmicked to the point of fiction."