Citing predictions that the 2018 iPhone line may soon enter a destocking phase, Citi Research cut production estimates for the iPhone XR, iPhone Xs, and iPhone Xs Max by a collective 10% (50 million to 45 million). Most of this cut was driven by lowered expectations of the iPhone Xs Max; Citi Research estimates Apple will produce only half as many iPhone Xs Max units as previously predicted.
https://www.notebookcheck.net/Citi-Research-cuts-estimate-for-Q1-production-of-iPhone-XS-Max-by-half.388126.0.html