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Value-at-Risk on a portfolio of Options, Futures and Equities Radhesh Agarwal (Ral13001) Shashank Agarwal (Sal13003) Sumit Jalan (Sjn13024)
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CALCULATING VALUE AT RISK FOR OPTIONS, FUTURES AND EQUITIES
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Monte Carlo Simulator The simulated prices are generated based on the Black-Scholes Terminal Price formula: St=S0*exp[(r – q - 0.5* σ ^2)t + σ tz t ] Where: S0 is the spot price at time zero r is the risk free rate q is the dividend yield σ is the annualized volatility t is the duration since time zero Z t is a random sample from a normal distribution with μ = 0 & σ = 1.
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Terminal Price Scenario Assumptions 1. Time step - 1 day Option Contract Expiry - 10 days Hence, 10 intermediate time steps taken 2. 100 scenarios Parameters S0 2000 r 0.15% q 0.01% σ 16.00% t 0.002739726
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Payoffs Assumptions 1.Futures Contract, European Call and Put Option 2. Strike Price = 2020 Payoff for a long futures = Terminal Price – Strike Payoff for a long call option = Maximum of (Terminal Price –Strike, 0) Payoff for the long put option = Maximum of (0, Strike-Terminal Price) Call Payoffs
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Future Return Series Steps 1.Discount each data point 2.Simple average of prices for future dates
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Output Worksheet Table Observations There is only a.27% chance that the worst case loss of over -23.34% There is a 3.02% chance that loss will be over 11%
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Call Option
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Call Options Observations There is only a.27% chance that the worst case loss of over -14.34% There is a 1.1% chance that loss will be over 5.24% At 95% confidence level the VaR is around 3%.
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Put Option
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Observations There is only a.27% chance that the worst case loss of over 3.83% There is a 9.34% chance that loss will be over 1.29% This shows that at 95% confidence level the VaR is around 1.9%.
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Sensitivity Analysis of VaR - Futures Observations 1.Positive Correlation between volatility and High negative returns 2.For medium volatility, the value at risk is at decent levels.
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Sensitivity Analysis of VaR –Call Option Observations 1.Positive Correlation between Value-at-Risk and Volatility 2.For high volatility, though the confidence interval for positive return is on a lower side, the losses possible are generally low
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Sensitivity Analysis of VaR – Put Option Observations 1.At all 3 levels of volatility, VaR is similar 2.Also, though the confidence interval for positive returns is on a lower side, the possible losses are not very high.
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Thank you!
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