Scroll down at this site to find "MF Global 2.0 may be unfolding now", posted by Ann Barnhardt on 2 May, 2012.
In Australia: I understand that "Penson Australia was taken over by Pershing which is owned by Bank of New York. (http://www.pershing.com/index.html)".
|Courtesy OptionVue Systems|
For actions which can reduce the risk associated with broker collapse, see the earlier posting which explains how to protect yourself from brokers going broke.
I acknowledge with thanks Ann Barnhardt, and JSMineset for bringing this to my attention.