A term for an individual who is always aware and knowledgeable of news (international, political, trades, etc.)
A term that comes from French but which is used in English is au courant.
knowing about the newest information, trends, etc.
stylish or current
Origin and Etymology of au courant: French, literally, in the current
If you're trying to get your point across as clearly and directly as possible, I would probably just say "informed."
A current term is "news junkie". I couldn't find it in a dictionary (at least, not one that wasn't urban...), but this Ngram shows how popular it has become lately.