Marine Shipping stocks and the Bulk Dry Index

In this my backtest studying the relation between the Bulk Dry Index and some of popular stocks in marine shipping sector, using CAGR as parameter of performance. CAGR is calculated from swing-high/swing-low to swing-low/swing-high of Baltic Dry index (ticker:BDI) over last years.

Marine shipping stocks are strongly correlated with the Bulk Dry Index.
Stocks dropping during Index falling and stocks raising during Index raising.
When Index raising and finding a potential swing-low, I will looking for that stock with the highest correlation whit BDI. From my backtest, those stocks are Star Bulk Carriers Corp, Knot Offshore Partners LP, Safe Bulkers Inc