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Value At Risk (VaR)

What is 'Value At Risk - VaR'

Value at risk (VaR) is a statistical technique used to measure and quantify the level of financial risk within a firm or investment portfolio over a specific time frame. This metric is most commonly used by investment and commercial banks to determine the extent and occurrence ratio of potential losses in their institutional portfolios. VaR calculations can be applied to specific positions or portfolios as a whole or to measure firm-wide risk exposure.

Explaining 'Value At Risk - VaR'

VaR modeling determines the potential for loss in the entity being assessed, as well as the probability of occurrence for the defined loss. VaR is measured by assessing the amount of potential loss, the probability of occurrence for the amount of loss and the time frame. For example, a financial firm may determine an asset has a 3% one-month VaR of 2%, representing a 3% chance of the asset declining in value by 2% during the one-month time frame. The conversion of the 3% chance of occurrence to a daily ratio places the odds of a 2% loss at one day per month.

Applying VaR

Investment banks commonly apply VaR modeling to firm-wide risk due to the potential for independent trading desks to expose the firm to highly correlated assets unintentionally. Employing a firm-wide VaR assessment allows for the determination of the cumulative risks from aggregated positions held by different trading desks and departments within the institution. Using the data provided by VaR modeling, financial institutions can determine whether they have sufficient capital reserves in place to cover losses or whether higher-than-acceptable risks require concentrated holdings to be reduced.

Problems With VaR Calculations

There is no standard protocol for the statistics used to determine asset, portfolio or firm-wide risk. For example, statistics pulled arbitrarily from a period of low volatility may understate the potential for risk events to occur, as well as the potential magnitude. Risk may be further understated using normal distribution probabilities, which generally do not account for extreme or black swan events.


Further Reading


'Climate value at risk'of global financial assets
www.nature.com [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

On the validity of value-at-risk: comparative analyses with expected shortfallOn the validity of value-at-risk: comparative analyses with expected shortfall
ideas.repec.org [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Comparative analyses of expected shortfall and value-at-risk: their estimation error, decomposition, and optimizationComparative analyses of expected shortfall and value-at-risk: their estimation error, decomposition, and optimization
ideas.repec.org [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Financial intermediary leverage and value-at-riskFinancial intermediary leverage and value-at-risk
www.econstor.eu [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Value at risk and expected stock returnsValue at risk and expected stock returns
www.tandfonline.com [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Value at risk: a new methodology for measuring portfolio riskValue at risk: a new methodology for measuring portfolio risk
ideas.repec.org [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Procyclical leverage and value-at-riskProcyclical leverage and value-at-risk
academic.oup.com [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Modelling daily value-at-risk using realized volatility and ARCH type modelsModelling daily value-at-risk using realized volatility and ARCH type models
www.sciencedirect.com [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Testing and comparing value-at-risk measuresTesting and comparing value-at-risk measures
www.sciencedirect.com [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …

Extreme value theory and value at risk: application to oil marketExtreme value theory and value at risk: application to oil market
www.sciencedirect.com [PDF]
… 9 . Why is it important to know the impact of climate change on asset values? Institutional … 12,13 . Value at risk (VaR) quantifies the size of loss on a portfolio of assets over a given time horizon, at given probability. Thus, our …


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