What is the Parametric Approach? The parametric approach assumes that portfolio returns follow a specific type of mathematical distribution (like a bell-shaped curve for normal distribution). Using some simple formulas, we calculate how much you could lose at a certain confidence level (like 95% or 99%). Steps to Estimate VaR 1. Get the Data You need: Portfolio value (how much your portfolio is worth today). Mean return (average return, usually based on past data). Volatility (how much the returns fluctuate, measured as a standard deviation). Confidence level (how certain you want to be about the worst-case loss, like 95% or 99%). 2. Use a Formula VaR is calculated as: VaR = z ⋅ Volatility ⋅ Portfolio Value \text{VaR} = z \cdot \text{Volatility} \cdot \text{Portfolio Value} VaR = z ⋅ Volatility ⋅ Portfolio Value Here: z z z is a number from statistics that depends on the confidence level: For 95%, z = 1.645 z = 1.645 z = 1.645 . For 99%, z = 2.33 z = 2.33 z = 2.33 . Multipl...
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