From Guardian: From copper to grains to oil, a range of commodities were lifted on Tuesday in a wave of buying by investors as major commodity indexes prepared to reshuffle their portfolios for the year.

Oil rose to a one-month high above $50 per barrel before retreating amid fresh concerns over the U.S. economy, copper rallied 7 percent and U.S. soybeans surged to three-month highs….. Full Article: Source