NEW YORK ( TheStreet) -- Natus Medical (Nasdaq: BABY) is trading at unusually high volume Thursday with 807,156 shares changing hands. It is currently at 4.1 times its average daily volume and trading down $1.22 (-7.8%) at $14.35 as of 10:31 a.m. ET. Natus Medical has a market cap of $444.3 million and is part of the health care sector and health services industry. Shares are up 9.8% year to date as of the close of trading on Wednesday. Natus Medical Incorporated develops, manufactures, and markets neurodiagnostic and newborn care products worldwide. The company has a P/E ratio of 28.9, above the average health services industry P/E ratio of 28.4 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Natus Medical as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures and compelling growth in net income. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself and weak operating cash flow. You can view the full Natus Medical Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.