一家银行使用λ=0.9的指数加权移动平均（EWMA）方法对证券的每日波动率进行建模。当前的每日波动率为1.5%。证券昨天的价格为20美元，今天的价格为18美元。使用连续复利收益率，更新以后的波动率估计是多少？

关于模型中Meta配置错误的说法是：A、如果我们想要在数据库映射的时候使用自己指定的表名，而不是使用模型的名称...

单项选择题关于模型中Meta配置错误的说法是：

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4.1 For each of the following, state in which day book ...

未知题型4.1 For each of the following, state in which day book the transaction would be recorded. (a) Sales made on credit. (b) Goods previously purchased by the business sent back to the original supplier. (c) Stock taken out of business for private use. (d) Cheque paid out to settle account relating to the purchase of goods for resale. (e) Fixed asset sold with payment received by cheque. (f) Furniture bought on credit specifically for resale.