So every week there are certain butterflies that are offered at zero in the SPX. Today it was the SPX Aug 2000/1995/1990. At the time it was about 50 points out of the money and it expires tomorrow morning. The only cost/risk is the commissions, which for me is about 4 cents (1 dollar per contract including exchange fees). So a 100 lot butter would cost $400. The question is it worth putting on for commissions?