$CDW is one of biggest winner #stocks today. read more:

CDW Corporation (symbol: CDW) was one of the biggest winners of the trading
day today (2015-08-03), gaining 7.51%. The number of shares that changed
hands was 3,063,477, or about 3.0 times the average daily volume in the
stock.
The closing price was $38.63, amounting to a market cap of $6,670,000,000,
about -1.75% off the highest price in the last 12 months. The stock has
been trading at a range between $27.59 and $39.32.
CDW is in the Catalog/Specialty Distribution industry, part of the Consumer
Services sector. It first went public in 2013.
Looking at its valuation, the stock is now trading at 26.83 times earnings.