This is fine in a busy market, but when there's little or no trading, the deeply discounted "sale" price becomes the value for any similar assets, even if the security is performing well.

FORBES: Accounting

There's no such thing as a foolproof trading indicator, but here's one that comes remarkably close.

FORBES: The T. Rowe Small-Cap Gauge

On July 11, 2003, the firm's chief financial officer sent an e-mail to all employees, including Hertz, saying there should be no trading in Track Data shares until earnings were announced on Aug. 12.

FORBES