Quote from NPTrader:
Most of the references to being able to rehypothecate funds indicate that you need to carry a margin loan through futures or shorting equities.
What's the implication for option writers who always maintain a positive cash balance, but carry contract obligations?
Quote from Options12:
This is a good question.
If you write options and have in your account $100 in cash and some short positions that require $50 in collateral to hold, then can the $100 (or any amount of it) be re-hypothecated?
Quote from comintel:
I do not know, but one futures broker told me that many futures firms do not want accounts of customers who are option sellers, because, he said, they "tie up the broker's capital."
I was puzzled as to why that would be the case, but maybe whatever the real reason is offers a clue also as to the answer to your question.
Quote from Options12:
Thanks for sharing that.
Maybe without a margin loan there's no way to leverage the customer account. The cash and short positions are just a liability.
Quote from FrankSlaughtery:
just a guess but it's prob b/c the brokers are very aware of traders who sold options then blew up not only themselves but wiped out the firms equity b/c they sold spx puts for $0.10 that were later worth $10.00 with no way to pay for them.
Quote from Options12:
FrankSlaughtery, to put it even more plainly:
"So it's not gambling. It's just the opposite."
--Cattle Rancher who lost a hedge in the MF Global crash.
From:
http://www.npr.org/2011/12/14/143727507/rancher-discusses-losing-money-with-mf-global