DislikedOk, I am examining it right now and I found interesting part:
"In the PPI, a new model is priced when the producer stops selling the previous model. Most items in the CPI are priced at the outlet until they are no longer available for sale"
That basically means, that if there is no consumer spending, CPI wont change as old goods just stay at shelves.
T.Ignored
However, what it tells me is that even if there was a direct correlation between CPI and PPI (Which according to the article, there obviously isn't) then they would not necessarily be correlated in the same month due to the production to sales cycle being potentially longer than a month.
Those who say it cannot be done should not interrupt those who are doing it