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關注：1
2013-05-23 12:21
求翻譯：歷史價格和交易數據的缺乏造成了使用歷史的時間序列數據計算收益率、方差以及收益之間的協 方差和相關系數變得極為困難。資產組合層次的信用風險計量模型正是通過克服這些問題而發展起來的。這類模型大體上可以分為兩大類：一類是尋求計算證券組合 的全部風險－收益的交替關系，如KMV的資產組合管理模型；另一類是集中風險維度和組合的VaR計算，如CreditMetrics資產組合模型。是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
歷史價格和交易數據的缺乏造成了使用歷史的時間序列數據計算收益率、方差以及收益之間的協 方差和相關系數變得極為困難。資產組合層次的信用風險計量模型正是通過克服這些問題而發展起來的。這類模型大體上可以分為兩大類：一類是尋求計算證券組合 的全部風險－收益的交替關系，如KMV的資產組合管理模型；另一類是集中風險維度和組合的VaR計算，如CreditMetrics資產組合模型。
問題補充： |
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2013-05-23 12:21:38
The lack of historical price and trading data resulted in the use of historical time series data to calculate the rate of return, variance and the benefits of covariance and correlation coefficient becomes extremely difficult. Portfolio level credit risk measurement model is developed to overcome th
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2013-05-23 12:23:18
Historical price and transaction data was due to lack of use of historical time-series of data to calculate the variance, as well as profitability, and proceeds from the between covariance and correlation coefficient is extremely difficult. The portfolio level of credit risk measurement models it is
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2013-05-23 12:24:58
The historical price and the transaction data have deficiently created between the use history time series data computation returns ratio, the variance as well as the income covariance and the correlation coefficient become extremely difficult.The property combination level credit risk measurement m
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2013-05-23 12:26:38
正在翻譯，請等待...
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2013-05-23 12:28:18
正在翻譯，請等待...
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