But investors should also be aware that shares of these companies tend to mimic the movements of commodity markets, which can be capricious, said Boniface A. Zaino, the manager of the Royce Opportunity fund.
However, tensions have emerged there with Isis over allegations that the jihadist group has been attempting to gain a monopoly on the movement of commodities, though there have been no reports of actual infighting yet.
The Economist's "all items" commodity price index has fallen by 4% since the start of the year, but this masks widely different movements of individual commodities.
In the United States, the index measures the price movements of all commodities flowing into primary markets of the United States whether domestically produced or imported.
Migration in H. armigera may not necessarily occur only as single or multiple long-distant flights, but may also involve human-aided movements of agriculture commodities between continents.
And if Africa is to escape its vulnerability to the capricious movements of world commodity prices, it must start to export more manufactures.
In a recent paper, Rezitis and Sassi (2013) analyzed the price movements of a commodity price index and provided future price predictions.
The Industrial Products business facilitates the movement of numerous commodities throughout North America.
In the last century business cycles followed the movement of agricultural commodities: A bumper wheat crop meant more railcars, thus increased demand for steel.
Shields (1997) introduced the flow metaphor for the movement of people, commodities, capital, and information across geographic space, and related them to vector or direction and movability or diffusion of fluids.
