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

TASER International, Inc. (symbol: TASR) was one of the worst losers of the
trading day today (2015-11-03), losing -12.44%. The number of shares that
changed hands was 9,399,668, or about 6 times the average daily volume in
the stock.
The closing price was $20.91, amounting to a market cap of $1,130,000,000,
about -41.84% off the highest price in the last 12 months. The stock has
been trading at a range between $17.73 and $35.95.
TASR is in the Ordnance And Accessories industry, part of the Capital Goods
sector.
Looking at its valuation, the stock is now trading at 43.47 times earnings.