Today's Small-Cap Winners and Losers

Shanda Interactive Entertainment (SNDA Quote) fell 3.1% after Piper Jaffray downgraded the stock to underperform from market perform. Shanda, an operator of online games in China, was down 43 cents to $13.52.

Synergetics USA (SURG Quote) saw its shares soar nearly 15% after the medical-device maker reported sales of $9.9 million and earnings of $858,000, or 4 cents a share, for its fiscal second quarter ended Jan. 30. Synergetics was lately up 91 cents to $7.

Matria Healthcare (MATR Quote) gained 7.2% following an upgrade from a Wall Street analyst. Piper Jaffray lifted its rating on Matria to outperform from market perform, lifting its shares $2.59 to $38.72.

Movie Gallery (MOVI Quote) surged following word the company plans to consider subleasing retail space at more than 2,200 of its video-rental stores. Movie Gallery said it expects retail partners to occupy an average of around 2,500 square feet at each of the locations.

The company is working with Excess Space Retail Services to help it find tenants for the space. Movie Gallery was higher by 89 cents, or 41%, at $3.06.

Shares of Natrol (NTOL Quote) were lower after the company announced the latest change in its senior management. On March 8, Gary De Mello resigned as chief operating officer as of the end of the month. De Mello will continue as an employee of the company until Sept. 30. Craig Cameron will assume the position of COO April 1.

Elliott Balbert recently handed over the chief executive and president posts to serve as executive chairman. Wayne Bos became CEO and president. Shares of Natrol lost 14 cents, or 6.7%, to $1.95, but volume was extremely light.