Quote from traderNik:
I finally switched to IB because I wanted to go to sleep knowing my funds up to $100K were protected by the Canadian government (CIPF). Businessman mentioned 'FSA' up to $70K in the U.K. Certainly no such protection exists in the U.S., as we saw during the Refco debacle.
You are incorrect about the US protections. Securities accounts are insured up to $500K by SIPC. IB sweeps any funds not needed for your overnight futures margins into your insured securities account every night.
Refco was a pure futures broker which means they didn't have such an arrangement.
But beyond that I don't believe retail Refco clients lost any money. I could be wrong on this last point though.