KEY POINTS

Satellite surveillance has found a new home in business. Click here for Part 2 in the series: "" 

As part of a growing trend among hedge funds and Wall Street firms, Cold War-style satellite surveillance is being used to gather market-moving information.

The surveillance pictures are often provided by private- sector companies like DigitalGlobein Colorado and GeoEyein Virginia, which build and launch satellites and take pictures for US government intelligence agency clients and private-sector satellite analysis firms.