China Said to Probe Speculation in Commodity Futures Rally

China’s top economic planner is investigating whether speculation has distorted commodity futures prices, due to concerns that the recent rally will drive inflation higher, according to people with knowledge of the matter.

OPEC Says Speculation Played Large Role in Drop in Oil Prices

Oil supply and demand don’t fully justify the 60 percent drop in prices between June and January as speculation also played a role, OPEC said. ...

Iron Ore Kicks Off 2015 With Rally on China Stimulus Speculation

Iron ore plummeted last year as surging global supplies topped demand. It opened 2015 by posting the biggest...