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Does drop in key shipping index predict global slowdown?

10 February 2014 Last updated at 10:19 GMT

Before the world fell into recession in 2008 there was one area of the global economy that gave a warning signal - the shipping industry.

The key measure used by industry to track freight rates is the Baltic Dry Index, which historically has been seen as a great forecaster of global economic demand.

However it has lost half its value this year - so should we be worried?

Jeannie Joye reports.