Some people believe based on those selling noise from the pits that it is possible to 'front run' the big banks. Here's a little thought experiment... Imagine you're GS... You need to sell a lot of contracts. You're not trading on price and want to get the best price you can get to sell.. You've a ton of contracts to sell Do you.... A. Both buy and sell to keep your selling activity as uncertain as possible over time B. Set limit orders outside the market C. Use programs to monitor the market for high activity (stop runs) to execute markets when liquidity is high D. Run down to the pit and announce to everyone that you have a big order to sell so they can front you.