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

Robert Half International Inc. (symbol: RHI) was one of the worst losers of
the trading day today (2016-07-27), losing -11.07%. The number of shares
that changed hands was 6,249,223, or about 5 times the average daily volume
in the stock.
The closing price was $36.86, amounting to a market cap of $4,770,000,000,
about -36.45% off the highest price in the last 12 months. The stock has
been trading at a range between $34.34 and $58.0.
RHI is in the Professional Services industry, part of the Technology sector.
Looking at its valuation, the stock is now trading at 13.39 times earnings.