Over all, insiders have sold more than $850 million of stock since the start of 2000.

"When insiders are selling, no one wants to buy the stock."

Its insiders sold at $17 in May, but the stock hit $102 Friday.

You feel even worse because the insiders sold before the bombshell.

After all, insiders with heavy investments usually sell when the stock finally takes off.

It also seems to help if the key insiders are not selling.

Once again, the new offering includes a promise the insiders will not sell any more stock for six months.

During that month, insiders sold 100,000 shares, a sure sign something was up.

They point out that company insiders at Sohu.com have been selling the stock.

But that fact was disclosed only months later, long after some insiders had sold shares.