Govt inflation numbers represent a portfolio consisting of all commodities in equal quantity. But if you hold a portfolio of iPhones, Toyotas, and etc (assuming they are non depreciating assets) that number would double very easily.
All of these are commodities. And every single product derived is based on commodity. Most commodities can be traded on commodity markets.
https://www.bls.gov/charts/consumer-price-index/consumer-pri...