Investors Still Pondering Fed's Next Rate Hike in Midday Trading

Stocks were little changed on Wall Street in midday trading Wednesday after opening slightly higher. Investors are still worried the Federal Reserve will start raising interest rates sooner than expected. Fears of a Fed rate hike is hitting the U.S. bond market. Treasury yields continue to rise this week on speculations of a raise in interest rates. Energy Stocks like Exxon Mobil (XOM) and Chevron (CVX) are pushing the blue chips lower. Shares of Apple (AAPL) are rising, a day after the tech giant's launch party unveiling new products like a smart watch and the iPhone 6. Palo Alto Networks (PANW) is climbing almost 8 percent after reporting its quarterly earnings before the bell. The maker of security software reported revenue exceeded estimates. In one year, shares skyrocketed nearly 100 percent.