BDI - korrelasjon til S&P

BDI er (for 2009, blir sikkert en vouge igjen) lagt død som indikator for aksjemarkedet i USA:

Over the long term (since 1985), the Baltic Dry Index and the S&P 500 have had a positive correlation of 0.5 (1 = perfect correlation, -1 = perfect inverse correlation). Like everything else recently, though, that relationship has been turned completely upside down. As shown in the chart below, the S&P 500 and the Baltic Dry Index have been moving in opposite directions for most of 2009. As one has risen, the other has declined, and when one falls, the other seems to rise. Looking at the correlation between the two shows that year to date, they have had a negative correlation of -0.4, which implies a significant inverse relationship between the two.

http://researchreloaded.com/content/baltic-dry-index-reliable-forward-indicator-nonsense

http://www.businessinsider.com/the-cost-of-global-shipping-is-a-lousy-economic-indicator-2009-5

http://www.businessinsider.com/its-time-to-forget-the-baltic-dry-index-2009-8