$200/day * 22 business days/month / 110mbf = $40/mbf/month But may is $120 cheaper than march so you buy the may futures, short the march futures, pay 2 months of penalties and dropship it for a profit of $40/mbf lol. I don't see any clause that voids the transaction after you stall for that long. I went ahead and shorted a few contracts of march lumber and I'm hoping this gets arbed away before I cover.