请问volatility spillovers是什么意思?

请问volatility spillovers是什么意思? high volatility是什么意思 financial market volatility是什么意思? price volatility是什么意思 stock price volatility是什么意思 volatility和variance的区别是什么 波动聚类（volatility clustering） ei收录查询,请问如何查询文章是否被EI收录,收录号是多少?文章题目是Evaluation of Various Stock Options with the Stock Price’s Volatility being Stochastic 英语翻译previous one-year rolling daily return volatility 请问with在这句话里的意思.It has put NewsCorp back in the black with chief executive Rupert Murdoch saying it shows the company is continuing to thrive on a truly global scale despite the volatility of world economies. 英语翻译The volatility parameter can be estimated either from historical data (historical volatility) or implied from the price of European options (implied volatility).In the first case,the length of the time series,the frequency and the estimat 请教在这个上下文中volatility的意思In simple terms,China favours tight controls of the economy whereas the US prefers free market solutions,hence the volatility here,he says.这里的volatility是什么意思? 英语翻译the freight rate volatility in logarithm (ht) is defined as the one-step ahead conditional volatility of freight rate from an AR-GARCH model, The upheaval is blamed for recent stock market volatility across the globe. volatility of ecnomic是什么意思?是不是经济的挥发度?经济的挥发度又是什么意思? Python中 d1 = lambda:random.uniform(-volatility,volatility) 这句有什么意义?最不能理解的就是中间那个” :,在IDLE下面什么都试不出来.（我用的是Python2.7.1） 英语翻译It will be a shortened trading week with US traders off for the Independence Day Holiday,but that does not mean that there will not be volatility. 请教一句外汇英语（技术分析类）Stop:With an initial stop at 99.00,we have a buffer on support but not for high volatility.后半句“have a buffer on support but not for high volatility.翻译机：停止：在最初停留在99.00 ,我