U.S. stock futures were lower today as investors prepared for the release of Nvidia's quarterly results, which analysts view as a key barometer for the AI investment cycle. Meanwhile, the U.S. Personal Consumption Expenditures (PCE) price index increased 0.2% from June to July and rose 3.7% from a year earlier. Core PCE, excluding food and energy, increased 3.3% year over year, unchanged from June. Analysts noted that while some PCE numbers were worse than expected, the stable core PCE might give the Federal Reserve more time to keep rates on hold.