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

First Majestic Silver Corp. Ord (symbol: AG) was one of the worst losers of
the trading day today (2016-07-20), losing -9.54%. The number of shares
that changed hands was 6,894,226, or about 1 times the average daily volume
in the stock.
The closing price was $15.08, amounting to a market cap of $2,360,000,000,
about -12.53% off the highest price in the last 12 months. The stock has
been trading at a range between $2.4 and $17.24.
AG is in the Precious Metals industry, part of the Basic Industries sector.