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Back-testing Expected Shortfall

New Model to Handle Risks Beyond VaR

Overview

Released on November 4, 2014, this whitepaper addresses the limitations of Value at Risk (VaR) as a risk management tool, highlighting the need for a more comprehensive measure such as Expected Shortfall. Following the financial crisis, organizations recognized that VaR alone may not be sufficient to handle extreme risk scenarios, especially in commodity trading.

The paper presents a new back-testing model for Expected Shortfall, demonstrating its application in managing extreme loss events. By testing six different commodities, the model provides valuable insights on how to manage risk more effectively, protect against severe drawdowns, and build risk capital gradually. The study concludes that combining two specific models can significantly improve an organization's protection against market volatility.

What's Inside

Key learnings and topics covered include:

  • Bootstrap Back-testing results for VaR and Expected Shortfall.
  • Two new back-testing parameters with models that explore the fat tails of the distribution.
  • Results and insights from the two back-testing parameters.
  • How to implement the back-testing parameters to avoid extreme loss scenarios.
  • An Excess Risk Ratio (ERR) driven model to assess and manage tail-end loss events.

This whitepaper is crucial for commodity trading firms looking to enhance their risk management practices and better handle extreme loss situations.

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