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

Unit Corporation Common Stock (symbol: UNT) was one of the worst losers of
the trading day today (2016-09-19), losing -5.61%. The number of shares
that changed hands was 818,719, or about 1 times the average daily volume
in the stock.
The closing price was $15.31, amounting to a market cap of $788,510,000,
about -21.61% off the highest price in the last 12 months. The stock has
been trading at a range between $3.9 and $19.53.
UNT is in the Oil & Gas Production industry, part of the Energy sector.