In early trading on Monday, shares of CoStar Group topped the list of the day's best performing components of the Nasdaq 100 index, trading up 1.1%. Year to date, CoStar Group registers a 2.6% gain.

In early trading on Thursday, shares of DexCom (DXCM) topped the list of the day's best performing components of the Nasdaq 100 index, trading up 6.9%. Year to date, DexCom has lost about 8.1% of ...

The Dow Jones Industrial Average narrowed its losses while the Nasdaq Composite flipped higher Monday afternoon in wildly volatile trading, as investors closely monitor any developments on ...