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

Core-Mark Holding Company, Inc. (symbol: CORE) was one of the worst losers
of the trading day today (2016-08-29), losing -14.17%. The number of shares
that changed hands was 3,086,604, or about 10 times the average daily
volume in the stock.
The closing price was $38.72, amounting to a market cap of $1,790,000,000,
about -22.56% off the highest price in the last 12 months. The stock has
been trading at a range between $29.18 and $50.0.
CORE is in the Food Distributors industry, part of the Consumer
Non-Durables sector.
Looking at its valuation, the stock is now trading at 32.95 times earnings.