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Viva lost vegas

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A risk manager is having an argument with his trading group. In a rare moment of honesty, the trading group says that because the company’s value-at-risk (VAR) calculation does not include vega risk1 and its portfolio contains a large number of options, the calculated VAR number is probably too low. The risk manager knew that vega was ignored, but always believed that vega risk was minor compared with that of the total portfolio. However, to try to improve the model, he decides to

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CRO interview: Brett Humphreys

Brett Humphreys is head of risk management at environmental markets specialist Karbone. He talks to Energy Risk about the challenges of modelling outcomes in unpredictable times and how he’s approaching the risks at the top of his risk register

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