But in the last few weeks, the company's shares have tumbled again.

Shares in the company tumbled 15.2 percent, to close at $21.92.

But its shares tumbled last year on bad earnings news.

For the same reasons, the American share has tumbled hugely over the last half century.

The shares have tumbled more than 50% since hitting a record of $75.81 in August 2000.

And France's share of the wine export market has tumbled as well.

The shares then tumbled in the course of Tuesday's trading.

Investors took him at his word and sent Sony's shares tumbling.

The remaining public shares have tumbled to $37.75, after falling $2.375 yesterday.

In response, the shares of oil companies have tumbled in the last two months.