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

Masonite International Corporat (symbol: DOOR) was one of the worst losers
of the trading day today (2016-08-11), losing -6.66%. The number of shares
that changed hands was 778,875, or about 3 times the average daily volume
in the stock.
The closing price was $67.18, amounting to a market cap of $2,040,000,000,
about -7.66% off the highest price in the last 12 months. The stock has
been trading at a range between $45.14 and $72.75.
DOOR is in the Forest Products industry, part of the Basic Industries
sector.
Looking at its valuation, the stock is now trading at 1492.89 times
earnings.