DGX outperforms the industry and the S&P 500 composite's gain in the past year, driven by strong core performance and contributions from acquisitions.

The most talked about and market moving research calls around Wall Street are now in one place. Here are today's research ...

Shares of Quest Diagnostics Inc. DGX slid 2.87% to $168.15 Tuesday, on what proved to be an all-around poor trading session for the stock market, with the S&P 500 Index SPX falling 0.76% to 5,572. ...

Shares of Quest Diagnostics Inc. DGX shed 1.39% to $173.12 Monday, on what proved to be an all-around rough trading session for the stock market, with the S&P 500 Index SPX falling 2.70% to 5,614. ...

Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the world ...