Cocoa traded in London decreased falling for a third straight day on Friday amid speculation that rain in the Daloa region in Ivory Coast, the world's largest producer of the commodity, is helping to boost prospects of the crop in the country. July Cocoa futures declined by 0.9% to 1,439 pounds a metric ton earlier London's NYSE Liffe today, while futures in New York slipped 0.8% to $2,125 a ton.