The highly volatile stock more than quadrupled in less than four weeks before retreating slightly.

The stock almost quadrupled in three days on the news.

The stock quadrupled last year, but has fallen 52 percent so far this year.

VaxGen's stock more than quadrupled from last summer to November, reaching a high of $23.25.

The stock has quadrupled in value, to about $26 million from $6 million.

The stocks of some smaller technology companies have tripled or quadrupled in value since bottoming out in late September.

And that is why the stock of Casino Magic, for instance, more than quadrupled this year, closing Friday at $18.25.

Since going public in June, the stock has more than quadrupled.

The stock more than quadrupled by the end of the day, instantly creating the most valuable Internet company in China.

Cablevision's stock is up 28 percent in the past month and has quadrupled in value compared with the same time last year.