Midday stock movers: Nvidia, Intel, Constellation Energy, Berkshire Hathaway, and more

The stock market is trading almost flat midday. The S&P 500 lost 0.05%, while the tech-heavy Nasdaq Composite added 0.06%. The Dow Jones Industrial Average lost 0.49%. The Russell 2000 Index rose 0.78%.

Five S&P 500 stocks making big midday…