Acusphere (Watertown, Massachusetts) said it received a letter from the Nasdaq stock market advising that, for the previous 30 consecutive business days, the bid price of the company's common stock had closed below the minimum $1.00 per share requirement for continued inclusion on the Nasdaq.

The company can regain compliance if, at any time before July 8, 2008, the bid price of its common stock closes at $1 per share or more for a minimum of 10 consecutive business days.

Acusphere is a specialty pharmaceutical company that makes new drugs and improved formulations of existing drugs using microsphere technology.