Spatial Aggregation and Weather Risk Management



Table 2a. Hedging Results of Historical Simulation, In-Sample Estimates, Full Sample, 1971-2002

District

Average of

Districts

State

(Aggregated)

D10

D20

D30

D40

D50

D60

D70

D80

D90

Unhedged

Avg. Yield

152.09

147.44

151.81

158.60

144.36

157.66

139.80

123.89

126.29

144.66

144.66

RMSL

43.07

42.06

48.90

50.42

52.97

42.89

43.07

41.07

44.34

45.42

39.80

ES 6%

240.56

237.91

224.41

235.23

201.04

251.92

227.55

192.83

181.88

221.48

235.38

ES 9%________________

258.39

246.09

235.74

252.45

216.20

277.84

241.14

195.22

196.93

235.55

________255.18

Hedged: Swap_________________________________________________________________________________________________________________________________

Weight

(contracts/acre, $1 tick)

0.17

0.19

0.26

0.31

0.33

0.28

0.27

0.15

0.30

0.25

0.27

Swap Fair Strike

644.26

803.91

798.75

851.04

804.03

907.38

1000.38

1092.37

994.53

877.40

877.40

RMSL

36.62

35.78

39.71

35.94

33.94

28.33

34.25

36.36

29.35

34.47

27.11

Change RMSL

-6.45

-6.29

-9.19

-14.48

-19.04

-14.56

-8.82

-4.70

-14.99

-10.95

-12.69

% Change RMSL

-14.97

-14.95

-18.80

-28.72

-35.94

-33.95

-20.48

-11.45

-33.80

-23.67

-31.88

ES 6%

268.96

265.89

253.94

276.25

263.69

318.32

243.14

216.71

230.44

259.71

281.75

ES 9%

281.75

268.19

273.14

292.36

270.04

326.55

258.27

222.80

234.68

269.75

284.68

Change ES 6%

28.41

27.98

29.53

41.03

62.65

66.40

15.58

23.88

48.57

38.23

46.37

Change ES 9%__________

23.36

22.10

37.40

39.91

53.85

48.72

17.13

27.59

37.75

________34.20

_________29.49

Hedged: Call Option

WEIGHT (contracts/Acre,
$1 tick)

2.44

0.69

0.59

0.73

0.56

0.39

0.69

0.18

0.54

0.76

0.68

Optimal Call Strike

864.96

875.89

876.00

920.78

819.00

929.68

1056.00

943.00

1014.00

922.15

953.48

RMSL

28.15

34.54

37.08

32.74

32.00

30.05

32.94

35.40

25.82

32.08

22.56

Change RMSL

-14.91

-7.53

-11.82

-17.68

-20.98

-12.84

-10.13

-5.67

-18.52

-13.34

-17.23

% Change RMSL

-34.63

-17.90

-24.17

-35.06

-39.59

-29.93

-23.51

-13.81

-41.76

-28.93

-43.31

ES 6%

296.46

254.24

265.16

290.69

263.34

314.05

257.82

221.10

249.64

268.06

295.29

ES 9%

304.80

273.51

274.00

306.76

271.39

319.75

264.94

227.23

253.43

277.31

302.31

Change ES 6%

55.90

16.33

40.75

55.46

62.30

62.13

30.26

28.28

67.76

46.57

59.91

Change ES 9%

46.41

27.42

38.26

54.31

55.19

41.91

23.80

32.01

56.51

41.76

47.13

aThe table presents results of the hedging analysis under the assumed objective of minimization of SV with an assumed constant price of
$2.50/bu. In-sample estimates were obtained by optimizing the objective with respect to the WD weight (WD weight and optimal strike)
when hedging with swaps (options). Statistics measuring changes in RMSL and ES are calculated relative to the unhedged revenue
exposures. “Average of Districts” column statistic values were obtained by averaging the individual district statistic values and is provided
to serve as a basis of comparison to the “State (Aggregated)” results. A decrease (increase) in the RMSL corresponds to a reduction
(increase) in risk as a result of the addition of a WD. In contrast, an increase (decrease) in the ES indicates a reduction (increase) in risk
exposure from adding a WD.

31



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