$BABY is one of biggest losers #stocks today. read more:

Natus Medical Incorporated (symbol: BABY) was one of the worst losers of
the trading day today (2016-04-04), losing -19.68%. The number of shares
that changed hands was 2,718,927, or about 8 times the average daily volume
in the stock.
The closing price was $31.84, amounting to a market cap of $1,030,000,000,
about -37.63% off the highest price in the last 12 months. The stock has
been trading at a range between $29.34 and $51.05.
BABY is in the Biotechnology: Electromedical & Electrotherapeutic Apparatus
industry, part of the Health Care sector. It first went public in 2001.
Looking at its valuation, the stock is now trading at 27.93 times earnings.