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

Stamps.com Inc. (symbol: STMP) was one of the worst losers of the trading
day today (2016-07-13), losing -7.85%. The number of shares that changed
hands was 1,876,933, or about 2 times the average daily volume in the stock.
The closing price was $73.85, amounting to a market cap of $1,290,000,000,
about -40.32% off the highest price in the last 12 months. The stock has
been trading at a range between $65.36 and $123.75.
STMP is in the Business Services industry, part of the Miscellaneous
sector. It first went public in 1999.
Looking at its valuation, the stock is now trading at 126.67 times earnings.