I actually love this as a name. I was originally going to say "just stick with Financier News", but Banker News is perfect.
I actually like the idea of this site. I spent a few years consulting in financial services and always found the world fascinating. I could see myself browsing it on a regular basis.
Another vote for Banker News. Three syllables vs six. That, and Financier News might attract pastry chefs in addition to your target audience...
As a member of your target audience, I'd suggest focusing on the discussion side since that's where you likely to be able to add value. Finance professionals already have content professionally curated and ranked by the various paid news services - Reuters, Bloomberg TOP, READ (ranked by views) etc., but there is no discussion there.