Cocoa futures have performed poorly in recent months but a rally in the London market this week will have provided sweet-toothed commodities traders with a financial treat.

Cocoa futures scheduled for September delivery listed on the London derivatives market Liffe enjoyed a rally this week to close today at £1,563 a tonne, up 6% since Friday 22. The price jump was driven by the end of annual cocoa harvest, prompting traders to take up long positions in both the London and US markets.