$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 (2016-06-16), losing -10.78%. The number of shares
that changed hands was 4,120,432, or about 1 times the average daily volume
in the stock.
The closing price was $26.32, amounting to a market cap of $1,790,000,000,
about -45.84% off the highest price in the last 12 months. The stock has
been trading at a range between $6.99 and $48.6.
SM is in the Oil & Gas Production industry, part of the Energy sector.