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Practical Issues In Pricing (and Using) Asian Basket Options: A Case of Livestock Gross Margin Insurance Marin Bozic - University of Minnesota MFM Seminar, Minneapolis, September 28, 2012
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Room 1: A Barn on Fire 3
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Nature of risk in the dairy sector Real price risk? Prolonged Period of Margins Much Below Average
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Livestock Gross Margin Insurance for Dairy Cattle (LGM-Dairy) JanFeb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Purchase at End of Month No Coverage 12345678910 Insurance Contract Period Farmer must decide: Monthly target milk marketings (M t+i ) expected feed usage (C t+i, SBM t+i ) Gross Margin Deductible (D)
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How is LGM-Dairy priced? JanFeb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Purchase at End of Month No Coverage 12345678910 Insurance Contract Period Extract information regarding expected prices and volatilities from futures prices and at-the-money options Calculate correlations based on historical data Use Monte Carlo methods to simulate indemnities Price of the Asian Basket Option set at mark-up over actuarially fair price (e.g. expected indemnity).
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Identify expected milk marketings, feed amounts Choose target IOFC margin to protect Insure equal percentage of each month’s production, e.g. flat coverage for 10 months. A Naïve approach to LGM-Dairy
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Identify expected milk marketings, feed amounts Choose target IOFC margin to protect Find a least-cost profile that protects the target IOFC. A (bit less) Naïve approach to LGM- Dairy
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Home-feed profile: Insuring 1 st -10 th month
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Home-feed profile: Insuring 1 st -3 rd month.
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Class III Milk Futures: Open Interest
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Home-feed profile: Insuring 8-10 th month
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Why using deferred contracts works the best
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Room 2: Mind your Tail
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How is LGM-Dairy priced? JanFeb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Purchase at End of Month No Coverage 12345678910 Insurance Contract Period Extract information regarding expected prices and volatilities from futures prices and at-the-money options Calculate correlations based on historical data Use Monte Carlo methods to simulate indemnities Price of the Asian Basket Option set at mark-up over actuarially fair price (e.g. expected indemnity).
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Is correlation a good way to think about dependence between variables?
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Lower tail dependence
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Upper tail dependence
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Copulas: Tool for dealing with nonlinear dependencies GaussianClaytonGumbel
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Comparing Copula Families
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Empirical Copula Empirical copula replaces unknown distributions with their empirical counterparts: Implementation: Bootstrap based on rank-order matrix Potential shortcomings: Small sample, serial dependency
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Effect of non-linear dependence on LGM premiums Home-FeedMarket-Feed Deductible$0.00$1.10$0.00$1.10 Official RMA Method $14,569$7,380$20,350$13,308 Rank Correlations $14,998$7,719$16,439$9,504 Empirical Copula $15,286$8,219$15,478$8,246 Unlike most situations in financial sector, in livestock margin insurance tail dependence decreases portfolio risk.
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Room 3: Mr. Black, this drink is flat.
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How is LGM-Dairy priced? JanFeb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Purchase at End of Month No Coverage 12345678910 Insurance Contract Period Extract information regarding expected prices and volatilities from futures prices and at-the-money options Calculate correlations based on historical data Use Monte Carlo methods to simulate indemnities Price of the Asian Basket Option set at mark-up over actuarially fair price (e.g. expected indemnity).
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Are Futures Prices Unbiased?
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Testing for bias in futures prices
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Test Design
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Essential assumption: Lognormality Bootstrap procedure
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Testing for Futures Price Bias
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Testing for Implied Volatility Bias
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Effect of biases on LGM premiums Home-FeedMarket-Feed Deductible$0.00$1.10$0.00$1.10 Official RMA Method 9,7435,19113,3168,873 Biased Soymeal Futures 9,74413,438 5,1928,992 Biased Milk Volatility 10,9726,28714,2359,686
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Room 4: A reason to smile. 39
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How is LGM-Dairy priced? JanFeb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Purchase at End of Month No Coverage 12345678910 Insurance Contract Period Extract information regarding expected prices and volatilities from futures prices and at-the-money options Calculate correlations based on historical data Use Monte Carlo methods to simulate indemnities Price of the Asian Basket Option set at mark-up over actuarially fair price (e.g. expected indemnity).
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Does it matter if marginal distributions are in fact not lognormal? In the current RMA ratings method, only at-the-money puts and calls are used to estimate variance of the terminal prices. Date: Jun 26, 2006 Contract: Corn, Dec ’06 Futures Price: $2.49
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42 Volatility smiles induced by high kurtosis
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43 Volatility skews induced by high skewness
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44 Generalized Lambda Distribution (GLD) allows changing one moment at a time
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Scenario 1: Corn as the only source of risk Corn skewness boosted 60%
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Scenario 2: Corn as the only source of risk Corn kurtosis boosted 60%
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Scenario 3: Corn as the only source of risk Both skewness and kurtosis boosted
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Scenario 4: Two sources of risk – milk and corn Effect nearly disappears
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Conclusions Modeling dependence using correlations may not suffice – tail dependence matters! Simplistic heuristics and CME settlement rules may have rendered dairy options too cheap. Volatility smiles may not be important for pricing Asian Basket Options
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Practical Issues in Pricing (and Using) Asian Basket Options: A Case of Livestock Gross Margin Insurance MFM Seminar September 28, 2012 Dr. Marin Bozic mbozic@umn.edu (612) 624-4746 Department of Applied Economics University of Minnesota-Twin Cities 317c Ruttan Hall 1994 Buford Avenue St Paul, MN 55108 50
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