OT - post what you are invested in and if possible why. Saying it would be OT to avoid giving some names is a real copout.
When I wrote "You can see what I post on" - that was giving you several names? Well if you are too lazy to check that out, and if two people demand it, then here's a list, but there's no point in me saying "why" when its subject to deletion:
Market Data 
Markets 
AI
