$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 (2016-06-10), losing -10.35%. The number of shares
that changed hands was 2,160,094, or about 1 times the average daily volume
in the stock.
The closing price was $29.8, amounting to a market cap of $2,030,000,000,
about -39.5% off the highest price in the last 12 months. The stock has
been trading at a range between $6.99 and $49.26.
SM is in the Oil & Gas Production industry, part of the Energy sector.