The stock market was mostly flat today ahead of a key House vote on the passage of the Republicans’ healthcare bill, which was delayed until Friday after GOP lawmakers failed to gather the necessary support. The Dow Jones Industrial Average lost just 5 points, or 0.02%, while other broader market indexes saw similar small declines. But several individual stocks saw much more severe drops, including Zillow Group (NASDAQ: Z) (NASDAQ: ZG), Proofpoint (NASDAQ: PFPT), and Accenture (NYSE: ACN).