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

Core Laboratories N.V. Common S (symbol: CLB) was one of the worst losers
of the trading day today (2016-10-20), losing -8.07%. The number of shares
that changed hands was 1,839,532, or about 4 times the average daily volume
in the stock.
The closing price was $105.81, amounting to a market cap of $4,670,000,000,
about -21.91% off the highest price in the last 12 months. The stock has
been trading at a range between $84.5 and $135.49.
CLB is in the Oilfield Services/Equipment industry, part of the Energy
sector. It first went public in 1995.
Looking at its valuation, the stock is now trading at 56.13 times earnings.