To repeat, how accurate the outcome CPI is, all depends upon how accurate the adjustment is.
Feel free to contact Williams at his web site with all your concerns, questions, and comments.
If he really wanted to show the rate under the old calculation (like he claims) he could actually do the work.
The article's not talking about the BLS's CPI, it's talking about the Commerce Dept's PCE, and let's skip any complaints about the BEA's adjustments and go for a list of exactly what adjustments we do want.
And why.
I contacted Williams and asked that he share with us his calculations that prove what he claims is true. I'd bet money he doesn't reply, but we'll see.
I also asked him how he comes to conclusions the entire global bond market is missing. It's hard to believe that all those thousands and thousands of people, who have access to more information than Williams will ever have, are missing the fact that we're living in a modern day Weimar Republic. I wonder why he thinks these very smart people are pissing their money (and their client's money) away on investments that lose 10% annually. I eagerly await for him to answer my questions and concerns.
I'll bet he'd respond to me if I wanted to purchase a newsletter that confirmed my fixed point of view on the subject, however...