In this paper, a null means stationary series is reached which matched ARMA model after removing the longterm tendency, cyclical fluctuating and seasonal fluctuating one by one from Baltic Freight Index.

Simple technique forecasting BDI;

This thesis analyzes the logarithm change rate of BCI BPI and JEHSI, then set up a ARCH model of the freight index s daily profit rate to find the internal rule of freight index fluctuation and then to supply helpful reference for operators and investors so that they can grasp changes in the market and avoid the price risk.