In poorer countries, where a larger part of family income is spent on food, unpredictable harvests and volatile food prices can lead to social unrest.

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Those who adhere to the random walk theory also point out that the timing of new data and news is unpredictable, and that stock prices react quickly to the introduction of new information.

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But residential prices remain frozen, and the investment climate remains unpredictable.

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That might sound glaringly obvious, but too many people talk about blue chip artists as if the investment potential of their works are guaranteed, when in fact, even prices for the very top selling artists are extremely unpredictable.

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Leading actors are making the investments needed to forge value chains that, not only promote sustainable farmer livelihoods, but are resilient in the face of shocks from increasingly unpredictable weather, higher food costs, and wild swings in currency, energy and commodity prices.

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