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

AeroVironment, Inc. (symbol: AVAV) was one of the worst losers of the
trading day today (2016-08-31), losing -16.95%. The number of shares that
changed hands was 1,691,543, or about 11 times the average daily volume in
the stock.
The closing price was $24.74, amounting to a market cap of $567,340,000,
about -23.74% off the highest price in the last 12 months. The stock has
been trading at a range between $19.1 and $32.44.
AVAV is in the Aerospace industry, part of the Capital Goods sector. It
first went public in 2007.
Looking at its valuation, the stock is now trading at 63.44 times earnings.