Downside Deviation as a Risk and Performance Measure

Summary

The document asks whether downside deviation has practical value for measuring risk or guiding portfolio allocation. The only response describes it as a coherent risk measure and notes its connection to Markowitz’s work. It says practitioners use the measure, apparently mainly to evaluate performance.

The exchange offers a brief orientation rather than a technical explanation. It does not define the calculation, specify the threshold or target return used to identify downside outcomes, compare the metric with volatility or other risk measures, or provide evidence about allocation decisions. Readers can take away that downside deviation is associated with downside-focused risk assessment and performance evaluation, but would need additional sources to judge its properties or use it in a portfolio process.

Key ideas

• Downside deviation focuses risk assessment on outcomes below a selected threshold.
• The response characterizes it as a coherent risk measure associated with Markowitz.
• The document says practitioners use it primarily for performance evaluation.
• The exchange provides no formula, empirical comparison, or specific portfolio-allocation method.

Tags

# Downside deviation


# Downside deviation












have any practitioners here worked with the downside deviation metric? I've looked a little into its concepts but wish to know its utility in practice (if any). Does it bring any value to risk measurement or allocation strategies?

## Answer by Alexander Didenko (score 1)

https://quant.stackexchange.com/a/10081

To my knowledge, it's coherent risk measure, featured in Markowitz, 1959. And yes, it is used by practitioners, but as it seems to me - mostly for the purpose of performance evaluation.

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.