Why do pork bellies get tumbled ?
Agricultural Commodity Contracts include : Live Cattle , Lean Hogs , Feeder Cattle , Class IV Milk , Class III Milk , Frozen Pork Bellies , International Skimmed Milk Powder ( ISM ) , Nonfat Dry Milk , Deliverable Nonfat Dry Milk , Dry Whey , Cash - Settled Butter , Butter , Random Length Lumber , Softwood Pulp , Hardwood Pulp .