$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 (2016-02-18), losing -12.22%. The number of shares
that changed hands was 2,953,485, or about 1 times the average daily volume
in the stock.
The closing price was $8.91, amounting to a market cap of $605,650,000,
about -85.22% off the highest price in the last 12 months. The stock has
been trading at a range between $8.38 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 2.69 times earnings.