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

SM Energy Company Common Stock (symbol: SM) was one of the worst losers of
the trading day today (2016-01-06), losing -16.29%. The number of shares
that changed hands was 4,982,591, or about 2 times the average daily volume
in the stock.
The closing price was $16.39, amounting to a market cap of $1,110,000,000,
about -72.81% off the highest price in the last 12 months. The stock has
been trading at a range between $16.02 and $60.28.
SM is in the Oil & Gas Production industry, part of the Energy sector.
Looking at its valuation, the stock is now trading at 4.94 times earnings.