Sen. Blanche Lincoln’s new bill on derivatives legislation raises some eye-watering questions on how far banning trading on certain commodities could go. The Wall Street Transparency and Accountability Act of 2010, released by the Senate last week, would ban trading on onion futures and motion picture receipts. According to the Financial Times, onion futures haven’t been traded since 1958 upon protest by farmers after prices collapsed. The FT story says that some argue that the ban on exchange trading for onions (which is supported by the National Onion Association) actually contributes to price volatility in the onion markets. (more…)

