I'm finding the whole MF Global story interesting, especially how money from people's accounts was transferred to MF's trading accounts against rules.
I've simply always been concerned about brokerage accounts and what's really protecting your interests there? Rules that if not followed totally screw you?
I've also expressed huge concern over derivatives, as the Buffet quote that lives on my Making Sense of My World blog says: "Derivatives" are "financial weapons of mass destruction."
MF Global is but one victim of derivatives blowing up, but what is interesting to me is people are suggesting that this is putting so much more at risk, whereas I'd suggest the risk was already there.
Our financial system is at risk of a domino effect of financial disasters from things that have been allowed without fully understanding the consequences.