This excerpt taken from the VNUS 10-K filed Mar 30, 2007.
Item 7A: Quantitative and Qualitative Disclosures about Market Risk
To date, substantially all of our sales have been denominated in U.S. dollars. Approximately 2% of total sales have been denominated in currencies other than U.S. dollars. Accordingly, we believe that there is currently no material exposure to risk from changes in foreign currency exchange rates.
Our exposure to interest rate risk at December 31, 2006 is related to our investment of our excess cash and cash equivalents in debt instruments of the U.S. government and its agencies, and in high-quality corporate issuers via several large money market funds. The funds maintain an average investment maturity of 90 days or less. Due to the short-term nature of these investments, we believe that there is currently no material exposure to interest rate risk arising from our investments.