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

Dean Foods Company Common Stock (symbol: DF) was one of the worst losers of
the trading day today (2016-03-22), losing -12.06%. The number of shares
that changed hands was 13,678,319, or about 5 times the average daily
volume in the stock.
The closing price was $16.92, amounting to a market cap of $1,550,000,000,
about -20.08% off the highest price in the last 12 months. The stock has
been trading at a range between $14.56 and $21.17.
DF is in the Specialty Foods industry, part of the Consumer Non-Durables
sector.