This product is hugely dependant on exact weather conditions to be able to be produced. As a result it is a temperamental product and production is quarantined to 20 degrees north and south of the equator. This product needs a hot and rainy environment to flourish. The largest producers of Cocoa are Cote d'Ivoire and Ghana.
There are 2 diseases that can massively affect production and therefore pricing of this product they are black pod disease and "witch's broom" fungus. Another huge factor affecting the price of this product is the relative instability of the major producing countries. Political, social and labour issues all can have a large impact on its' pricing.