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

Ferroglobe PLC - Ordinary Share (symbol: GSM) was one of the worst losers
of the trading day today (2017-01-03), losing -14.59%. The number of shares
that changed hands was 4,683,997, or about 8 times the average daily volume
in the stock.
The closing price was $9.25, amounting to a market cap of $1,590,000,000,
about -23.93% off the highest price in the last 12 months. The stock has
been trading at a range between $6.9 and $12.16.
GSM is in the Metal Fabrications industry, part of the Capital Goods
sector. It first went public in 2009.