Bloomberg via San Francisco Chronicle August 23, 2010 Coffee declined the most in more than two years as a bigger-than-expected plunge in U.S. home sales stoked concern the economy may relapse into a recession, eroding demand for commodities. The Standard & Poor's 500 Index fell for a fourth day as global equity markets sank. The Reuters/Jefferies CRB Index of 19 raw materials plunged the most since June 29, led by the drop in coffee. Before today, the commodity surged 50 percent in New York during the past year and yesterday touched the highest price in almost 13 years. "There is long liquidation after the market rose to a new high," said Boyd Cruel, a senior analyst at Vision Financial Markets in Chicago. "The weakness in the equity markets is also adding selling pressure." Arabica coffee for December delivery slumped 14.8 cents, or 8.1 percent, to settle at $1.6845 a pound on ICE Futures U.S. in New York, the biggest decline for a most-active c...