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

Fairmount Santrol Holdings Inc. (symbol: FMSA) was one of the worst losers
of the trading day today (2016-12-02), losing -5.99%. The number of shares
that changed hands was 16,985,832, or about 5 times the average daily
volume in the stock.
The closing price was $8.95, amounting to a market cap of $1,990,000,000,
about -11.21% off the highest price in the last 12 months. The stock has
been trading at a range between $1.0 and $10.08.
FMSA is in the Mining & Quarrying of Nonmetallic Minerals (No Fuels)
industry, part of the Basic Industries sector. It first went public in 2014.