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

Envision Healthcare Holdings, I (symbol: EVHC) was one of the worst losers
of the trading day today (2015-10-22), losing -30.39%. The number of shares
that changed hands was 20,552,001, or about 14 times the average daily
volume in the stock.
The closing price was $25.4, amounting to a market cap of $4,720,000,000,
about -44.72% off the highest price in the last 12 months. The stock has
been trading at a range between $20.33 and $45.95.
EVHC is in the Hospital/Nursing Management industry, part of the Health
Care sector. It first went public in 2013.
Looking at its valuation, the stock is now trading at 25.68 times earnings.