Here is a recent chart of the Baltic Dry Index

The Baltic Dry Index is the
cost of shipping bulk dry goods over 26 different routes using different sizes of ships. A low cost of shipping (90% off the high) does not necessarily mean a 90% decline in volume. Imagine shippers cutting there charges to the bone in fierce competition for loads. I'll bet ~90% of the volume could be handled for around ~1,000.
Walmart stuff is not shipped in bulk ships, but container ships.
To get a handle on container shipping, Port Tracker seems to be the authority.
http://www.trafficworld.com/newssection/ocean.asp?id=49730Port Container Traffic Fell 8 Percent
2/6/2009
Thomas L. Gallagher
Web Editor
Retail container ports handled 15.2 million twenty-foot-equivalent units last year, according to the monthly Port Tracker report released Feb. 6 by the National Retail Federation and IHS Global Insight.
Volume was down 7.9 percent with the lowest total since 2004, when 14 million TEU moved through the ports. And even harder times are coming in the first half of 2009, said Port Tracker.
In the first six months of 2008, ports handled 7.5 million TEU. The survey forecasts traffic will decline 11.8 percent to 6.6 million TEU.
"2008 was one of the most challenging years retailers have seen, and all indications are that 2009 won't be any better," said Jonathan Gold, NRF vice president for supply chain and customs policy. "Unfortunately, cargo volume at the ports reflects retailers' anticipated sales, and NRF expects that sales will get worse before they get better. Retailers are only going to import what they can sell."
U.S. ports surveyed handled 1.06 million TEU in December, the last month for which actual numbers are available. That was down 13.9 percent from November and 17.2 percent from December 2007, and made December the 18th month in a row to see a year-over-year decline. The last month to see a year-over-year increase was July 2007, when the 1.44 million TEU moved through the ports was up 3.4 percent from July 2006.
January was estimated at 1.04 million TEU, down 15.8 percent from January 2008, and February, traditionally the slowest month of the year, is forecast at 1 million TEU, down 18.7 percent from 2008. March is forecast at 1.08 million TEU, down 7 percent from a year earlier, April at 1.14 million TEU, down 10.1 percent; May at 1.16 million TEU, down 11 percent, and June at 1.19 million TEU, down 8.5 percent.
"The combined influence of the recession and the usual winter slowdown will result in extremely weak February port traffic," IHS Global Insight Economist Paul Bingham said. "Import container traffic is projected to be weak through June because of the underlying reduced demand during the global recession.
Comment:
The BDI increase from 1,000 to 2,000 piqued my interest.
Could this be the Peter Schiff Scenario where the consumption of the worlds resources shifts from the US to the rest of the world? Could the BDI increase might suggest this?