For system monitoring, we introduce time index: k,k-1,k-2

Then we define the quotients of present IV_(k) over previous IV_(k-1) as the System Successional Trends of the market, and each/every fund:

Trend_(i,k)= IV_(i,k)/IV_(i,k-1) ,i=1,2,…17

The expectation of the trend values are 1:

Trend_(i,k)=IV_(i,k)/IV_(i,k-1)  =1, where i=1,2,...17,means that IV  is no change. If

Trend_(i,k)=IV_(i,k)/IV_(i,k-1)  >1, where i=1,2,...17,means that the IV of given fund is increasing, but

Trend_(i,k)=IV_(i,k)/IV_(i,k-1)  <1, where i=1,2,...17,means that the IV of given fund is decreasing.