UnitedHealth rose again, boosted by Berkshire Hathaway’s purchasing of shares last week. Dayforce soared following a report that it could be bought by private-equity firm Thoma Bravo.

Key Takeaways U.S. equities were mixed at midday following the release of the July retail sales report, which came in as expected.UnitedHealth Group lifted the entire insurance sector after Warren Buffett's Berkshire Hathaway reported it held 5 million shares in its portfolio.

Bloomberg journalists discuss today's biggest winners and losers in the stock market. Listen for analysis on the companies making news on Wall Street.