QuoteOriginally posted by: FermionIn my limited experience, a big hurdle for small outfits is the minimum capital required for portfolio margining. (Typically $500K - $5M, depending on broker.) Separate margining on individual trades, however much they are mutually hedging, can seriously limit your leverage.When I looked into this, it seemed to be the critical factor.with a high likelihood it is going to be less than $5m. but i am not planning a very levered outfit, although the availability of shorts via the prime broker is a big concern to me.gardener3, marine, thanks for the links. I wasn't even aware IB provided PB services, I had always clicked on the individuals section before. saratoga prime is another outfit i have given a thought to.daveangel: newedge is a large PB, often considered on par with some of the bigger PB firms.