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

Mistras Group Inc Common Stock (symbol: MG) was one of the worst losers of
the trading day today (2016-10-07), losing -12.99%. The number of shares
that changed hands was 610,649, or about 6 times the average daily volume
in the stock.
The closing price was $20.3, amounting to a market cap of $587,790,000,
about -23.31% off the highest price in the last 12 months. The stock has
been trading at a range between $17.84 and $26.47.
MG is in the Military/Government/Technical industry, part of the Consumer
Services sector. It first went public in 2009.
Looking at its valuation, the stock is now trading at 24.76 times earnings.