中国管理科学 ›› 2026, Vol. 34 ›› Issue (3): 39-50.doi: 10.16381/j.cnki.issn1003-207x.2022.0618cstr: 32146.14.j.cnki.issn1003-207x.2022.0618
收稿日期:2022-03-29
修回日期:2022-07-02
出版日期:2026-03-25
发布日期:2026-03-06
通讯作者:
戴鹏飞
E-mail:pfdai@whut.edu.cn
基金资助:
Zhiqiang Jiang1, Haiyan Hu1, Pengfei Dai2(
), Li Wang1, Weixing Zhou1
Received:2022-03-29
Revised:2022-07-02
Online:2026-03-25
Published:2026-03-06
Contact:
Pengfei Dai
E-mail:pfdai@whut.edu.cn
摘要:
将粮食价格维持在合理范围,防止极端波动发生是保障国家粮食安全的首要任务。本文以粮食期货价格为研究对象,聚焦粮食期货价格极端波动,运用事件流模型对极端波动的发生规模和发生过程同时建模,并应用于极端风险测度的计算。针对中美粮食期货(CBOT稻谷、CBOT小麦、CBOT玉米、郑商早籼、郑商强麦、大商玉米)价格的研究表明,事件流模型可以较好地刻画粮食期货价格波动的胖尾特征和集聚特征,对极端波动的发生规律和发生规模表现出较好的拟合效果。针对极端风险测度的样本内外检验表明,事件流模型可有效地提升风险测度计算的准确性。本文的研究结果不仅有助于更好地理解粮食期货价格极端波动的发生模式,也为粮食价格风险管理和粮食市场平稳运行提供了科学思路和技术手段。
中图分类号:
蒋志强,胡海燕,戴鹏飞, 等. 基于事件流模型的粮食期货极端风险测度计算研究[J]. 中国管理科学, 2026, 34(3): 39-50.
Zhiqiang Jiang,Haiyan Hu,Pengfei Dai, et al. Estimating Extreme Risk Measures of Grain Future Market Based on Event Flow Models[J]. Chinese Journal of Management Science, 2026, 34(3): 39-50.
表1
期货收益率数据的描述性统计结果"
| 粮食期货 | 起始时间 | 均值 | 标准差 | 偏度 | 峰度 | JB统计量 | ADF统计量 | LB统计量 |
|---|---|---|---|---|---|---|---|---|
| CBOT稻谷 | 2000.01.01 | 0.021 | 1.907 | 0.189 | 47.261 | 424891.125*** | -68.039*** | 51.461*** |
| CBOT小麦 | 2000.01.01 | 0.024 | 1.894 | 0.026 | 8.240 | 6259.317*** | -72.974*** | 10.634 |
| CBOT玉米 | 2000.01.01 | 0.040 | 1.616 | 0.202 | 4.783 | 751.940*** | -69.853*** | 27.100*** |
| 郑商早籼 | 2009.04.20 | 0.008 | 0.905 | 0.696 | 8.016 | 2451.313*** | -49.254*** | 20.073** |
| 郑商强麦 | 2003.03.28 | -0.013 | 0.768 | 0.054 | 7.033 | 2809.193*** | -64.060*** | 15.026 |
| 大商玉米 | 2004.09.22 | 0.024 | 0.756 | 0.240 | 6.665 | 2301.564*** | -66.919*** | 27.097*** |
表2
ACD-POT模型和Hawkes-POT模型的样本内参数估计和拟合优度检验"
| 模型 | ACD模型参数 | Hawkes过程参数 | POT模型参数 | lnL | AIC | 拟合优度检验 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ω | a | b | γ | κ | μ | n | δ | η | ρ | ξ | β0 | β1 | β2 | KS W | KS ζ | |||
| CBOT稻谷 | ||||||||||||||||||
| 线性 | 1.121 | 0.237 | 0.700 | 0.660 | 1.121 | 0.129 | 0.520 | 0.190 | 2.253 | -1535.6 | 3089.2 | 0.292 | 0.367 | |||||
| ACD | (0.196) | (0.026) | (0.020) | (0.030) | (0.196) | (0.034) | (0.058) | (0.043) | (0.505) | |||||||||
| 对数 | 0.436 | 0.205 | 0.671 | 0.666 | 1.500 | 0.124 | 0.512 | 0.192 | 2.330 | -1534.0 | 3085.9 | 0.322 | 0.283 | |||||
| ACD | (0.023) | (0.013) | (0.010) | (0.031) | (0.143) | (0.034) | (0.058) | (0.044) | (0.498) | |||||||||
| 指数 | 0.037 | 0.553 | 0.048 | 0.036 | 0.184 | 0.620 | 2.738 | -1544.1 | 3102.1 | 0.492 | 0.306 | |||||||
| 衰减 | (0.004) | (0.048) | (0.024) | (0.008) | (0.037) | (0.059) | (0.501) | |||||||||||
| 幂律 | 0.039 | 0.268 | 0.201 | 0.843 | 0.161 | 0.166 | 0.518 | 3.754 | -1544.2 | 3104.3 | 0.445 | 0.337 | ||||||
| 衰减 | (0.004) | (0.025) | (0.016) | (0.502) | (0.023) | (0.034) | (0.058) | (0.511) | ||||||||||
| CBOT小麦 | ||||||||||||||||||
| 线性 | 0.723 | 0.158 | 0.789 | 0.888 | 1.126 | -0.068 | 0.420 | -0.014 | 5.697 | -1543.3 | 3104.5 | 0.113 | 0.063 | |||||
| ACD | (0.098) | (0.012) | (0.010) | (0.032) | (0.054) | (0.025) | (0.048) | (0.034) | (0.445) | |||||||||
| 对数 | 0.516 | 0.159 | 0.661 | 0.852 | 1.174 | -0.055 | 0.526 | 0.020 | 4.407 | -1550.2 | 3118.5 | 0.195 | 0.090 | |||||
| ACD | (0.018) | (0.009) | (0.008) | (0.033) | (0.062) | (0.027) | (0.049) | (0.036) | (0.459) | |||||||||
| 指数 | 0.040 | 0.213 | 0.317 | 0.013 | -0.062 | 0.334 | 6.163 | -1538.3 | 3090.6 | 0.160 | 0.135 | |||||||
| 衰减 | (0.004) | (0.017) | (0.022) | (0.004) | (0.026) | (0.046) | 0.450 | |||||||||||
| 幂律 | 0.046 | 0.404 | 0.380 | 0.014 | 1.128 | -0.052 | 0.394 | 5.546 | -1540.4 | 3096.7 | 0.175 | 0.096 | ||||||
| 衰减 | (0.004) | (0.037) | (0.016) | (0.005) | (0.137) | (0.026) | (0.046) | 0.455 | ||||||||||
| CBOT玉米 | ||||||||||||||||||
| 线性 | 3.247 | 0.241 | 0.505 | 0.659 | 1.517 | -0.061 | 0.350 | 0.025 | 5.392 | -1492.2 | 3002.3 | 0.980 | 0.139 | |||||
| ACD | (0.291) | (0.033) | (0.026) | (0.026) | (0.130) | (0.035) | (0.044) | (0.035) | (0.448) | |||||||||
| 对数 | 0.909 | 0.180 | 0.493 | 0.645 | 1.551 | -0.061 | 0.372 | 0.019 | 5.313 | -1494.7 | 3007.4 | 0.967 | 0.183 | |||||
| ACD | (0.030) | (0.016) | (0.012) | (0.025) | (0.137) | (0.036) | (0.045) | (0.036) | (0.450) | |||||||||
| 指数 | 0.051 | 0.199 | 0.314 | 0.051 | -0.076 | 0.446 | 4.809 | -1491.4 | 2996.8 | 0.982 | 0.174 | |||||||
| 衰减 | (0.004) | (0.021) | (0.033) | (0.012) | (0.034) | (0.045) | (0.439) | |||||||||||
| 幂律 | 0.045 | 0.311 | 0.364 | 0.120 | 0.562 | -0.066 | 0.476 | 4.444 | -1491.3 | 2998.6 | 0.940 | 0.226 | ||||||
| 衰减 | (0.004) | (0.031) | (0.024) | (0.045) | (0.058) | (0.032) | (0.044) | (0.443) | ||||||||||
| 郑商早籼 | ||||||||||||||||||
| 线性 | 3.028 | 0.230 | 0.536 | 0.671 | 1.491 | 0.158 | 0.160 | -0.045 | 2.252 | -434.2 | 886.4 | 0.731 | 0.098 | |||||
| ACD | (0.470) | (0.058) | (0.044) | (0.045) | (0.202) | (0.093) | (0.038) | (0.072) | (0.363) | |||||||||
| 对数 | 1.083 | 0.155 | 0.438 | 0.636 | 1.572 | 0.158 | 0.198 | -0.045 | 1.915 | -435.0 | 888.1 | 0.969 | 0.131 | |||||
| ACD | (0.062) | (0.032) | (0.026) | (0.045) | (0.242) | (0.095) | (0.038) | (0.072) | (0.364) | |||||||||
| 指数 | 0.065 | 0.232 | 0.412 | 0.096 | 0.175 | 0.211 | 1.573 | -436.5 | 887.0 | 0.959 | 0.137 | |||||||
| 衰减 | (0.008) | (0.068) | (0.193) | (0.046) | (0.096) | (0.038) | (0.362) | |||||||||||
| 幂律 | 0.051 | 0.183 | 0.352 | 9.999 | 2E-6 | 0.168 | 0.200 | 1.667 | -435.3 | 886.5 | 0.978 | 0.141 | ||||||
| 衰减 | (0.008) | (0.038) | (0.073) | (61.02) | (0.031) | (0.095) | (0.038) | (0.356) | ||||||||||
| 郑商强麦 | ||||||||||||||||||
| 线性 | 1.995 | 0.323 | 0.542 | 0.710 | 1.408 | -0.100 | 0.505 | 0.173 | 0.774 | -1001.9 | 2021.7 | 0.985 | 0.123 | |||||
| ACD | (0.316) | (0.043) | (0.034) | (0.041) | (0.149) | (0.038) | (0.036) | (0.060) | (0.309) | |||||||||
| 对数 | 0.554 | 0.259 | 0.577 | 0.680 | 1.470 | -0.099 | 0.494 | 0.167 | 0.891 | -1004.0 | 2026.1 | 0.986 | 0.172 | |||||
| ACD | (0.034) | (0.017) | (0.014) | (0.040) | (0.169) | (0.037) | (0.036) | (0.060) | (0.315) | |||||||||
| 指数 | 0.024 | 0.340 | 0.504 | 0.031 | -0.093 | 0.481 | 1.743 | -1003.3 | 2020.7 | 0.938 | 0.214 | |||||||
| 衰减 | (0.005) | (0.027) | (0.041) | (0.008) | (0.036) | (0.035) | (0.322) | |||||||||||
| 幂律 | 0.021 | 0.427 | 0.736 | 0.082 | 0.658 | -0.100 | 0.493 | 1.651 | -1003.1 | 2022.3 | 0.991 | 0.256 | ||||||
| 衰减 | (0.004) | (0.034) | (0.036) | (0.027) | (0.061) | (0.037) | (0.036) | (0.319) | ||||||||||
| 大商玉米 | ||||||||||||||||||
| 线性 | 0.158 | 0.028 | 0.669 | 0.599 | 4.199 | -0.024 | 0.226 | -0.016 | 1.997 | -788.4 | 1594.8 | 0.605 | 0.144 | |||||
| ACD | (0.026) | (0.004) | (0.024) | (0.015) | (0.052) | (0.046) | (0.029) | (0.048) | (0.238) | |||||||||
| 对数 | 0.061 | 0.280 | 0.519 | 0.548 | 3.317 | -0.036 | 0.237 | -0.018 | 1.938 | -787.2 | 1592.4 | 0.760 | 0.123 | |||||
| ACD | (0.036) | (0.019) | (0.033) | (0.019) | (0.067) | (0.047) | (0.029) | (0.049) | (0.233) | |||||||||
| 指数 | 0.025 | 0.701 | 0.069 | 0.033 | -0.014 | 0.238 | 1.823 | -793.7 | 1601.4 | 0.636 | 0.374 | |||||||
| 衰减 | (0.005) | (0.056) | (0.066) | (0.007) | (0.048) | (0.029) | (0.241) | |||||||||||
| 幂律 | 0.020 | 0.428 | 0.779 | 0.116 | 0.460 | -0.014 | 0.275 | 1.507 | -795.6 | 1607.2 | 0.655 | 0.380 | ||||||
| 衰减 | (0.005) | (0.036) | (0.044) | (0.046) | (0.041) | (0.047) | (0.029) | (0.235) | ||||||||||
表3
ACD-POT模型样本内外VaR估计值准确性检验结果"
| 模型 | α(%) | 线性ACD-POT | 对数ACD-POT | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 失败 | LRuc | LRind | LRcc | DQhit | DQVaR | 失败 | LRuc | LRind | LRcc | DQhit | DQVaR | ||
| 样本内检验 | |||||||||||||
CBOT 稻谷 | 5 | 190 | 0.30 | 0.00 | 0.00 | 0.00 | 0.00 | 190 | 0.30 | 0.00 | 0.00 | 0.00 | 0.00 |
| 2.5 | 87 | 0.89 | 0.03 | 0.08 | 0.01 | 0.00 | 91 | 0.77 | 0.04 | 0.11 | 0.03 | 0.01 | |
| 1 | 39 | 0.54 | 0.08 | 0.17 | 0.00 | 0.00 | 40 | 0.44 | 0.09 | 0.17 | 0.00 | 0.00 | |
CBOT 小麦 | 5 | 199 | 0.21 | 0.03 | 0.05 | 0.28 | 0.28 | 202 | 0.14 | 0.09 | 0.08 | 0.27 | 0.25 |
| 2.5 | 90 | 0.90 | 0.27 | 0.54 | 0.80 | 0.75 | 92 | 0.93 | 0.12 | 0.29 | 0.36 | 0.33 | |
| 1 | 35 | 0.81 | 0.35 | 0.63 | 0.92 | 0.92 | 36 | 0.94 | 0.37 | 0.67 | 0.85 | 0.84 | |
CBOT 玉米 | 5 | 191 | 0.36 | 0.00 | 0.00 | 0.00 | 0.00 | 197 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 |
| 2.5 | 93 | 0.71 | 0.00 | 0.00 | 0.00 | 0.00 | 91 | 0.87 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 1 | 37 | 0.84 | 0.40 | 0.69 | 0.78 | 0.78 | 36 | 0.97 | 0.38 | 0.68 | 0.84 | 0.79 | |
郑商 早籼 | 5 | 69 | 0.35 | 0.12 | 0.20 | 0.08 | 0.03 | 69 | 0.36 | 0.12 | 0.20 | 0.16 | 0.10 |
| 2.5 | 34 | 0.58 | 0.08 | 0.18 | 0.01 | 0.00 | 33 | 0.71 | 0.01 | 0.04 | 0.00 | 0.00 | |
| 1 | 16 | 0.32 | 0.02 | 0.03 | 0.00 | 0.00 | 16 | 0.32 | 0.02 | 0.03 | 0.00 | 0.00 | |
郑商 强麦 | 5 | 211 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 183 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 2.5 | 71 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 68 | 0.88 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 1 | 27 | 0.96 | 0.00 | 0.01 | 0.00 | 0.00 | 26 | 0.89 | 0.00 | 0.01 | 0.00 | 0.00 | |
大商 玉米 | 5 | 127 | 0.28 | 1.00 | 0.56 | 0.89 | 0.78 | 125 | 0.37 | 0.38 | 0.46 | 0.90 | 0.88 |
| 2.5 | 55 | 0.71 | 0.57 | 0.79 | 1.00 | 0.99 | 57 | 0.92 | 0.63 | 0.89 | 1.00 | 1.00 | |
| 1 | 23 | 0.98 | 0.23 | 0.48 | 0.54 | 0.53 | 23 | 0.98 | 0.50 | 0.79 | 0.83 | 0.81 | |
| 样本外检验 | |||||||||||||
CBOT 稻谷 | 5 | 84 | 0.75 | 0.00 | 0.00 | 0.00 | 0.00 | 77 | 0.63 | 0.00 | 0.00 | 0.00 | 0.00 |
| 2.5 | 39 | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 40 | 0.92 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 1 | 20 | 0.37 | 0.00 | 0.00 | 0.00 | 0.00 | 17 | 0.85 | 0.01 | 0.04 | 0.00 | 0.00 | |
CBOT 小麦 | 5 | 96 | 0.43 | 0.41 | 0.52 | 0.74 | 0.46 | 90 | 0.88 | 0.79 | 0.96 | 0.73 | 0.63 |
| 2.5 | 48 | 0.58 | 0.78 | 0.83 | 0.95 | 0.78 | 45 | 0.92 | 0.89 | 0.99 | 0.99 | 0.98 | |
| 1 | 20 | 0.60 | 0.50 | 0.69 | 0.71 | 0.14 | 15 | 0.50 | 0.61 | 0.70 | 0.49 | 0.28 | |
CBOT 玉米 | 5 | 83 | 0.56 | 0.01 | 0.02 | 0.14 | 0.10 | 80 | 0.36 | 0.00 | 0.01 | 0.06 | 0.06 |
| 2.5 | 48 | 0.57 | 0.00 | 0.01 | 0.00 | 0.00 | 47 | 0.67 | 0.00 | 0.01 | 0.00 | 0.00 | |
| 1 | 34 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 31 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | |
郑商 早籼 | 5 | 82 | 0.00 | 0.59 | 0.00 | 0.00 | 0.00 | 83 | 0.00 | 0.40 | 0.00 | 0.00 | 0.00 |
| 2.5 | 56 | 0.00 | 0.44 | 0.00 | 0.00 | 0.00 | 55 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | |
| 1 | 24 | 0.00 | 0.68 | 0.00 | 0.00 | 0.00 | 26 | 0.00 | 0.79 | 0.00 | 0.00 | 0.00 | |
郑商 强麦 | 5 | 69 | 0.81 | 0.00 | 0.01 | 0.01 | 0.00 | 68 | 0.71 | 0.01 | 0.02 | 0.03 | 0.00 |
| 2.5 | 31 | 0.43 | 0.00 | 0.01 | 0.00 | 0.00 | 32 | 0.55 | 0.01 | 0.02 | 0.01 | 0.00 | |
| 1 | 14 | 0.96 | 0.00 | 0.00 | 0.00 | 0.00 | 16 | 0.64 | 0.00 | 0.00 | 0.00 | 0.00 | |
大商 玉米 | 5 | 106 | 0.02 | 0.20 | 0.03 | 0.23 | 0.10 | 107 | 0.01 | 0.11 | 0.01 | 0.11 | 0.05 |
| 2.5 | 62 | 0.00 | 0.10 | 0.00 | 0.03 | 0.02 | 61 | 0.01 | 0.09 | 0.01 | 0.04 | 0.04 | |
| 1 | 31 | 0.00 | 0.13 | 0.00 | 0.00 | 0.00 | 29 | 0.01 | 0.10 | 0.01 | 0.00 | 0.00 | |
表4
Hawkes-POT模型样本内外VaR估计值准确性检验结果"
| 模型 | α(%) | 指数Hawkes-POT | 幂律Hawkes-POT | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 失败 | LRuc | LRind | LRcc | DQhit | DQVaR | 失败 | LRuc | LRind | LRcc | DQhit | DQVaR | ||
| 样本内检验 | |||||||||||||
CBOT 稻谷 | 5 | 173 | 0.83 | 0.01 | 0.02 | 0.00 | 0.00 | 183 | 0.58 | 0.26 | 0.45 | 0.35 | 0.35 |
| 2.5 | 85 | 0.76 | 0.22 | 0.44 | 0.00 | 0.00 | 85 | 0.76 | 0.22 | 0.44 | 0.32 | 0.24 | |
| 1 | 30 | 0.37 | 0.26 | 0.35 | 0.00 | 0.00 | 31 | 0.47 | 0.28 | 0.43 | 0.04 | 0.03 | |
CBOT 小麦 | 5 | 183 | 0.92 | 0.22 | 0.46 | 0.87 | 0.86 | 184 | 0.86 | 0.23 | 0.48 | 0.79 | 0.79 |
| 2.5 | 81 | 0.29 | 0.41 | 0.40 | 0.66 | 0.64 | 82 | 0.34 | 0.91 | 0.63 | 0.66 | 0.65 | |
| 1 | 28 | 0.15 | 0.21 | 0.16 | 0.68 | 0.57 | 29 | 0.21 | 0.23 | 0.22 | 0.75 | 0.61 | |
CBOT 玉米 | 5 | 177 | 0.93 | 0.02 | 0.06 | 0.38 | 0.38 | 184 | 0.66 | 0.04 | 0.11 | 0.47 | 0.44 |
| 2.5 | 79 | 0.27 | 0.85 | 0.53 | 0.03 | 0.02 | 80 | 0.32 | 0.88 | 0.60 | 0.28 | 0.26 | |
| 1 | 37 | 0.82 | 0.40 | 0.69 | 0.91 | 0.91 | 32 | 0.53 | 0.45 | 0.62 | 0.97 | 0.97 | |
郑商 早籼 | 5 | 67 | 0.44 | 0.47 | 0.57 | 0.67 | 0.64 | 66 | 0.52 | 0.79 | 0.79 | 0.55 | 0.48 |
| 2.5 | 30 | 0.92 | 0.04 | 0.11 | 0.06 | 0.06 | 31 | 0.93 | 0.79 | 0.96 | 0.70 | 0.69 | |
| 1 | 11 | 0.72 | 0.66 | 0.85 | 1.00 | 1.00 | 13 | 0.82 | 0.60 | 0.85 | 1.00 | 1.00 | |
郑商 强麦 | 5 | 133 | 0.99 | 0.01 | 0.03 | 0.04 | 0.03 | 131 | 0.87 | 0.09 | 0.22 | 0.55 | 0.46 |
| 2.5 | 76 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 67 | 0.94 | 0.12 | 0.30 | 0.68 | 0.58 | |
| 1 | 19 | 0.12 | 0.01 | 0.01 | 0.00 | 0.00 | 23 | 0.48 | 0.20 | 0.33 | 0.25 | 0.25 | |
大商 玉米 | 5 | 117 | 0.83 | 0.37 | 0.65 | 0.40 | 0.40 | 118 | 0.76 | 0.15 | 0.34 | 0.58 | 0.38 |
| 2.5 | 56 | 0.85 | 0.74 | 0.93 | 0.96 | 0.95 | 60 | 0.73 | 0.62 | 0.83 | 0.99 | 0.96 | |
| 1 | 20 | 0.53 | 0.55 | 0.69 | 0.73 | 0.73 | 22 | 0.84 | 0.51 | 0.79 | 0.99 | 0.91 | |
| 样本外检验 | |||||||||||||
CBOT 稻谷 | 5 | 74 | 0.41 | 0.00 | 0.00 | 0.00 | 0.00 | 63 | 0.03 | 0.00 | 0.00 | 0.01 | 0.00 |
| 2.5 | 40 | 0.92 | 0.00 | 0.00 | 0.00 | 0.00 | 30 | 0.08 | 0.02 | 0.01 | 0.08 | 0.05 | |
| 1 | 20 | 0.37 | 0.00 | 0.00 | 0.00 | 0.00 | 14 | 0.57 | 0.62 | 0.75 | 0.50 | 0.29 | |
CBOT 小麦 | 5 | 92 | 0.72 | 0.92 | 0.93 | 0.77 | 0.76 | 89 | 0.97 | 0.80 | 0.97 | 0.79 | 0.73 |
| 2.5 | 48 | 0.58 | 0.78 | 0.83 | 0.95 | 0.95 | 47 | 0.69 | 0.81 | 0.90 | 0.97 | 0.97 | |
| 1 | 19 | 0.76 | 0.52 | 0.78 | 0.71 | 0.71 | 19 | 0.76 | 0.52 | 0.78 | 0.71 | 0.71 | |
CBOT 玉米 | 5 | 70 | 0.04 | 0.03 | 0.01 | 0.19 | 0.19 | 66 | 0.01 | 0.01 | 0.00 | 0.07 | 0.06 |
| 2.5 | 47 | 0.67 | 0.01 | 0.03 | 0.05 | 0.04 | 47 | 0.67 | 0.04 | 0.12 | 0.21 | 0.18 | |
| 1 | 24 | 0.15 | 0.00 | 0.01 | 0.00 | 0.00 | 22 | 0.32 | 0.28 | 0.34 | 0.68 | 0.68 | |
郑商 早籼 | 5 | 68 | 0.00 | 0.72 | 0.00 | 0.03 | 0.03 | 64 | 0.00 | 0.86 | 0.02 | 0.10 | 0.10 |
| 2.5 | 40 | 0.00 | 0.49 | 0.00 | 0.01 | 0.01 | 33 | 0.03 | 0.11 | 0.03 | 0.05 | 0.03 | |
| 1 | 15 | 0.06 | 0.47 | 0.13 | 0.20 | 0.09 | 11 | 0.48 | 0.60 | 0.68 | 0.98 | 0.83 | |
郑商 强麦 | 5 | 77 | 0.47 | 0.08 | 0.16 | 0.20 | 0.03 | 81 | 0.23 | 0.05 | 0.08 | 0.10 | 0.02 |
| 2.5 | 35 | 0.93 | 0.06 | 0.18 | 0.60 | 0.10 | 37 | 0.80 | 0.09 | 0.22 | 0.69 | 0.40 | |
| 1 | 16 | 0.64 | 0.01 | 0.04 | 0.00 | 0.00 | 19 | 0.22 | 0.02 | 0.04 | 0.00 | 0.00 | |
大商 玉米 | 5 | 101 | 0.07 | 0.23 | 0.09 | 0.37 | 0.32 | 99 | 0.10 | 0.62 | 0.23 | 0.64 | 0.52 |
| 2.5 | 58 | 0.02 | 0.06 | 0.01 | 0.06 | 0.06 | 48 | 0.36 | 0.21 | 0.30 | 0.62 | 0.56 | |
| 1 | 27 | 0.02 | 0.45 | 0.05 | 0.14 | 0.12 | 20 | 0.45 | 0.49 | 0.59 | 0.95 | 0.90 | |
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