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

Jack In The Box Inc. (symbol: JACK) was one of the worst losers of the
trading day today (2016-02-18), losing -16.16%. The number of shares that
changed hands was 8,231,527, or about 11 times the average daily volume in
the stock.
The closing price was $64.48, amounting to a market cap of $2,310,000,000,
about -35.51% off the highest price in the last 12 months. The stock has
been trading at a range between $62.2 and $99.99.
JACK is in the Restaurants industry, part of the Consumer Services sector.
Looking at its valuation, the stock is now trading at 22.62 times earnings.