Why do you guys worry about this when there is no prior borrowing requirements needed to sell SSFs.OneChicago, the Single Stock Futures Exchange, has available the following stock listings in SSFs, AZ, BAC, BCS, C, CS, DB, FRE, GS, HBC, LEH, FNM, JPM, MER, MFG, MS, RBS, UBS, each contract equivalent to 100 shares, 4 contract months, expiry the third Friday of each expiry and physical delivery T+ 3days. Most expiries coincide with listed equity options.
You have access to the Exchange through IB. So why worry about GS and letting them control what you can or can't do?