Single-commodity producers (whether gold, platinum, iron ore, sugar, etc.) are great stocks to hold when the commodities that they produce are undergoing a significant bull run. It is a strategy of mine to buy the best of bread in the space when the commodity is running, but at the first sign of any weakness I bail. Commodity companies are price takers and when the price is in bull phase that’s great, but as soon as any weakness starts to set into the price the companies find it tough. Revenues drop (unless they can ramp up production) and costs continue to increase, leaving them squeezed. We’re seeing this with Kumba Iron Ore, a stock I held until the first weak trading update and I bailed. We recently saw another weak update − the stock is under pressure and is likely to remain so.