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- weighted realized covariance 赋权已实现协变差
- Realized covariance matrix is a new measurement of the volatility and correlation of portfolio. 摘要“已实现”协方差矩阵是对投资组合波动性及相关性的一种全新的度量方法。
- The FIVAR model based on realized covariance matrix is good basis of studying co-persistence. 针对“已实现”协方差阵建立的FIVAR模型为进一步研究波动的协同持续性提供了基础。
- The research shows that the realized volatility and the realized covariance after taking logarithm have good normal distribution characteristics and the same long memory characteristics. 研究发现，“已实现”波动和“已实现”协方差取对数后具有良好的正态分布特性，相同的长记忆性。
- The paper extends realized volatility based on high-frequency data to realized covariance matrix based on multivariate high-frequency data, to describe volatility and correlation of multivariate. 把基于一维高频数据的“已实现”波动率扩展到多维高频数据情形，给出“已实现”协方差阵，并给出了协方差阵的极限性质，用以刻画多维金融变量的波动率和相关性。
- weighted realized bipower variation 赋权“已实现”双幂次变差
- We can get realized variance by summing squared high frequency return.Similarly, we get the realized covariation by multiplying two assets’ high frequency return. 实际方差以及实际协方差估计量可以通过加总日内高频收益的平方或者协积来获得，理论上的研究表明这两个估计量具有良好的统计特性，诸如一致性和渐进正态性。
- The chair sagged down under the fat man's weight. 椅子经这胖人一坐便压弯了。
- The selection was weighted against me. 那次选拔对我不利55。
- A reliable car is worth its weight in gold. 靠得住的汽车就是无价之宝。
- She was weighted down with cares. 她心事重重。
- The stick had been weighted with lead. 这条棍子灌了铅增加了分量。
- She was weighted down with parcels. 她携带著沉重的包裹。
- The pillars have to support the weight of the roof. 这些柱子须承受屋顶的重量。
- The President swings his weight to get laws passed. 总统运用权力使法律获得通过。
- His opinion doesn't carry much weight. 他的意见没多少影响。
- Bananas are usually sold by weight. 香蕉通常按重量卖。
- The net weight of this jar of coffee is 180 grams. 这瓶咖啡净重180克。
- These fish vary in weight from 3 lb to 5 lb. 这些鱼的重量从3磅到5磅不等。
- Realized Covariance Matrix "已实现"协方差
