Not a direct response -- I wanted to reply to the parent which was just deleted. It mentioned 'legal and ethical reasons'. An obvious legal problem would seem

Not a direct response -- I wanted to reply to the parent which was just deleted. It mentioned 'legal and ethical reasons'. An obvious legal problem would seem to be demonstrating the segregation of public data from private data under Google's management. Wouldn't they need to submit to some kind of external auditing to prove that only public data was being used for financial analysis? Not going to happen. I don't think there's a real ethical problem so much as a PR risk of the kind that Google already has to deal with: people are suspicious that their private Google-hosted data is being scrutinised for dubious reasons.