And when it delivers its payload, it needs to be weighted down with ballast to stop it shooting up into the air.

ECONOMIST: Monitor

But that might alter when biotechnology delivers new enzymes that can make ethanol efficiently from just about any sort of plant material.

ECONOMIST: The future of energy

All eyes will be on Bernanke when he delivers a highly anticipated speech to an annual Fed symposium in Jackson Hole, Wyo.

FORBES: Precious Metals, Other Markets To Take Cue From Bernanke Speech Friday