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

Chesapeake Energy Corporation C (symbol: CHK) was one of the worst losers
of the trading day today (2016-01-19), losing -13.48%. The number of shares
that changed hands was 26,358,583, or about 1 times the average daily
volume in the stock.
The closing price was $3.08, amounting to a market cap of $2,040,000,000,
about -85.67% off the highest price in the last 12 months. The stock has
been trading at a range between $2.95 and $21.49.
CHK is in the Oil & Gas Production industry, part of the Energy sector.