Investor users ranked by total bounty spending on bounties. This may vary from the value listed in users' profiles because this includes (all?) bounties on deleted posts, which are not included in profiles.
Q&A for developers and researchers interested in open data
SELECT UserId as [User Link], SUM(BountyAmount) as TotalBountyAmount FROM Votes WHERE UserId > 0 AND VoteTypeId = 8 -- BountyStart GROUP BY UserId ORDER BY SUM(BountyAmount) DESC