In this paper, we study the variation of the scale in calculated portfolio’s VaR caused by the market factors’s perturbation using principal component analysis, and we focus on the variation of the principal component number caused by the disturbance of the market factor, the boundary of the disturbance of the market factors are given.

This paper reviews the concept and the calculating method of Value at Risk(VaR) and points out the importance of predicting the volatility of market factor for calculating VaR.

This paper reviews the meaning and calculating method of Value at Risk and point out the importance of predicting the volatility of market factor for calculating VaR.

Thus,it defines two factors,time-value factor and market-value factor.

Generally, the performance of mutual funds is thought to be influenced by market risk factors, therefore we use market factor analysis to evaluate the mutual funds.

Influence of market factor on calculation of mineral reserves value;

Finally the effect of market factors on the option contract was analyzed,and the main impacts of supply chain perfo.

There are three reason for this phenomenon; first, the most direct and internal reason is the scholar’s general phychology of “seeking compensation” in this certain time; second, the most important external reason is the effect of market factor and the participation of the booksellers; and last, the close connection with the special social ethos of this per.

the difference of tolerance among individual policy-holders, the influencecaused by the change of price space upon customer demand, the difference of demand among different groups of potential policy-holders, without considering the influence on price owing to market factors.