波罗的海交易所的BDI的计算方法：

从2009年7月1日开始，BDI使用新算法，如下：

The proposed BDI has an equal weighting of the timecharter averages of the BCI, BPI,　BSI and BHSI and is a continuation of the present timeseries.　　　For the creation of BDI we now use the following formula:　　　((CapesizeTCavg + PanamaxTCavg + SupramaxTCavg + HandysizeTCavg)/ 4) *　0.113473601　Where TCavg = Time charter average.