If Gas Prices Go Up, Are Speculators To Blame?

Some U.S. lawmakers and a number of international leaders say oil prices are being driven far higher than necessary by financial investors who gain from driving up commodity prices. They want to limit futures contracts to crack down on speculation.

Daniel Yergin, author of the Pulitzer Prize-winning book, The Prize, talks with host Scott Simon about the role of speculators in the energy markets.