Quote from trump-baja:
Joab,
I know a guy at Bright.
Bright is a member of the Chicago Stock Exchange, if I remember our conversation correctly.
My friend has to pay $500 or $600 a year to the exchange (not to Bright) to be included under Bright's membership "umbrella."
Obviously this $500 or $600 a year does not allow anyone to go on to the Chicago Stock Exchange floor to buy and sell IBM or whatever. But it apparently gives Bright the right to freely allocate the buying power granted to Bright by the exchange amongst its members as it sees fit.
On certain exchange floors, you can buy "full memberships" which allow you to trade any pit - or "partial memberships" which allow you to only trade in a few of the pits that the exchange has.
I guess the yearly fee to the exchange is sort of a "partial membership" which shields you from getting hassled regarding your leverage vs. a true retail customer. Hopefully it shall remain this way.
If any of this is not correct, I would expect Mr. Don Bright to appear with a correction - and I would defer to whatever he says since this is his business and this is just my 2 cents.