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

Caseys General Stores, Inc. (symbol: CASY) was one of the worst losers of
the trading day today (2016-09-07), losing -9.08%. The number of shares
that changed hands was 3,257,253, or about 7 times the average daily volume
in the stock.
The closing price was $121.21, amounting to a market cap of $4,740,000,000,
about -11.02% off the highest price in the last 12 months. The stock has
been trading at a range between $98.8 and $136.22.
CASY is in the Automotive Aftermarket industry, part of the Consumer
Durables sector. It first went public in 1983.
Looking at its valuation, the stock is now trading at 21.15 times earnings.