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- 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。
- Based on the unbiased estimate of realized variance under serially correlated noise proposed by Hansen &Lunde (2004b), we went a further step by deducing a measure of variance of noise. 本文基于Hansen &Lunde(2004b) 给出的在噪声序列存在相关性假设下的一种关于RV 的无偏估计, 进一步地推导出一种在此情形下估计噪声方差的方法。
- My ideas are at variance with his. 我的思想和他的不同。
- Nothing can set the twin brothers at variance. 没有什么事能使这对双胞胎兄弟吵起来。
- Her conduct is at variance with her words. 她言行不一。
- I never realized I loved you until now. 我至今才意识到我爱你。
- This theory is at variance with the known facts. 这种理论与已知事实不符。
- I realized I had had it in my pocket all along. 我发觉原来这一直就在我口袋里。
- We are at variance about our lodger. 我们在对待房客的问题上意见不一。
- Few people realized the discovery was significant. 很少有人认识到这一发现的重要性。
- The question of woman suffrage sets them at variance. 妇女参政的问题使他们发生争执。
- He hasn't realized his full potential yet. 他还没有意识到他的全部潜能。
- I realized it was useless to reason with him. 我知道和他说理是毫无意义的。
- He realized what a swine he had been. 他认识到他做的事是多么的不像话。
- No one realized the dimensions of his problems. 没有人意识到他的问题有多么严重。
- He realized the dream of his life time. 他实现了他毕生的愿望。
- He has realized that Bill is a fair-weather friend. 他已意识到比尔是个不能共患难的朋友。
- The furniture realized 900 at the sale. 拍卖这家具获900英镑。
- His actions are often at variance with his principles. 他的行为经常与他的原则不相符合
- It put me in a quandary when I realized that I had missed my train. 当我意识到我已赶不上火车时,我不知如何是好。