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

McEwen Mining Inc. Common Stock (symbol: MUX) was one of the worst losers
of the trading day today (2016-07-20), losing -14.81%. The number of shares
that changed hands was 6,961,588, or about 2 times the average daily volume
in the stock.
The closing price was $3.74, amounting to a market cap of $1,110,000,000,
about -23.98% off the highest price in the last 12 months. The stock has
been trading at a range between $0.65 and $4.92.
MUX is in the Precious Metals industry, part of the Basic Industries sector.