OptionsHouse charges an additional $0.35 per contract on certain index products where the exchange charges fees, regardless of commission plan. OptionsHouse reserves the right to pass-through any additional regulatory or exchange transaction fees. See Rates and Fees for details on trade commissions for mutual funds, spreads, which applies to orders with the same underlying symbol, up to four legs per order, and other securities. For stocks priced $2.00 or less that are not options eligible, add $0.005 per share for the entire order. Customers may trade up to 50,000 shares or 4,000 option contracts per trade; trades in excess of these parameters require multiple order tickets and will be billed as separate orders. Flat commissions may not apply outside certain risk parameters.