In an up market, stock that can be freely traded should not be a material factor.

FORBES: Hang Up On Your China Fund Manager

Fraud was a material part of the mortgage collapse, a big factor in commercial property and loan losses and a component in investment banking and private-equity losses that did more damage than acknowledged.

ECONOMIST: Letters

Estimates of injury and damage, it is admitted, could be out either way by a factor of ten: much depends on the nature of the material used and on prevailing weather conditions.

ECONOMIST: How dirty bombs are made, and what they can do