Shares in weight-management company NutriSystem Inc. (NASDAQ: NTRI), which have starved investors over the last year, falling from over $70 to as low as $12.55 a share, are surging more than 30% today on news of a new CEO and the release of preliminary numbers much stronger than analysts had expected.

Earnings estimates for the first quarter show revenues of $216 million, $13 million more than analysts had figured. The company also named Joseph Redling as the new CEO.

According to a report in Forbes, current Chairman and CEO Michael Hagan said: "The business is in good shape as we enter the second quarter. The business performance in the first quarter was better than expected as the marketing efficiency in the latter stages of the quarter showed improvement, and it's certainly stabilized versus January trends. We also continue to witness improvement in our customer retention efforts and in the business of reactivating ex-customers."

They also noted that during the 1st quarter they had bought back almost 10% of all outstanding shares. And the company is debt free.

With summer approaching and people wanting to look good in their swim suits, look for sales to start picking up.

For investors looking for a battered stock that maybe a turnaround story, you may want to take a look at NutriSystem's.

Aaron Katsman is the lead Portfolio Manager and Managing Director of America Israel Investment Associates, LLC. and Senior Editor of IsraelNewsletter.com. DISCLOSURE: Writer's fund has no position in any stock mentioned, as of 4/8/08.