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

Noble Energy Inc. Common Stock (symbol: NBL) was one of the worst losers of
the trading day today (2016-03-28), losing -8.19%. The number of shares
that changed hands was 10,586,923, or about 2 times the average daily
volume in the stock.
The closing price was $29.69, amounting to a market cap of $12,790,000,000,
about -44.69% off the highest price in the last 12 months. The stock has
been trading at a range between $23.77 and $53.68.
NBL is in the Oil & Gas Production industry, part of the Energy sector.