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

Fortinet, Inc. (symbol: FTNT) was one of the worst losers of the trading
day today (2016-10-12), losing -10.06%. The number of shares that changed
hands was 21,203,026, or about 14 times the average daily volume in the
stock.
The closing price was $30.66, amounting to a market cap of $5,290,000,000,
about -31.3% off the highest price in the last 12 months. The stock has
been trading at a range between $23.16 and $44.63.
FTNT is in the Computer peripheral equipment industry, part of the
Technology sector. It first went public in 2009.
Looking at its valuation, the stock is now trading at 828.65 times earnings.