NEW YORK ( TheStreet) -- Kelly Services (Nasdaq: KELYA) is trading at unusually high volume Thursday with 806,811 shares changing hands. It is currently at 4.1 times its average daily volume and trading down $3.05 (-17.8%) at $14.06 as of 2:40 p.m. ET. Kelly Services has a market cap of $578.9 million and is part of the services sector and diversified services industry. Shares are up 18.1% year to date as of the close of trading on Wednesday. Kelly Services, Inc., together with its subsidiaries, provides workforce solutions to various industries worldwide. The company has a P/E ratio of 10.9, below the average diversified services industry P/E ratio of 12 and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Kelly Services as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures and impressive record of earnings per share growth. However, as a counter to these strengths, we also find weaknesses including poor profit margins, weak operating cash flow and a generally disappointing performance in the stock itself. You can view the full Kelly Services Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.