Some banks have started to sell tail-risk products. Deutsche Bank has created the ELVIS index, which generates returns when stockmarket volatility increases.
一些银行开始销售尾风险产品，德意志银行创造了Elvis指标，能够根据股市增长的波动性产生回报。
The hydrocracking tail oil possesses the characteristics of higher viscosity index, pour point, viscosity and lower sulfur, nitrogen, impurity content.
加氢裂化尾油粘度指数高，低硫、低氮、杂质含量少，倾点和粘度偏高。
Some statistical test methods on "fat tail" distribution of time series are obtained by using properties of extreme value theory and extreme index estimator under large sample.
使用极值理论和极值指数估计量的性质，在大样本的情况下得到序列分布“肥尾”现象的检验方法。
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