AAPL Leads Gains as Energy and Defense Stocks Rally Amid Volatility Dip

Apple Inc. (AAPL) led the charge among major U.S. equities, closing Monday with a 2.8% gain, propelling the Nasdaq Composite higher by 1.1%. The rally came amid strong investor sentiment toward tech giants with resilient earnings and growing AI-related revenue streams. AAPL's performance was mirrored by defense contractor Lockheed Martin (LMT), which advanced 2.5% on renewed optimism around defense spending and international arms contracts. The energy sector posted significant gains, with crude oil futures (CL=F) settling at $86.40 per barrel, up 2.1% on expectations of tighter supply due to OPEC+ production discipline and seasonal demand shifts. The S&P 500 Energy Sector Index rose 2.3%, outperforming the broader market. This movement coincided with a 13% drop in the CBOE Volatility Index (^VIX) to 14.7, indicating a retreat in market anxiety and a shift toward risk-on positioning. Key momentum was also seen in semiconductor and cybersecurity stocks, with Nvidia (NVDA) and Palantir Technologies (PLTR) rising 2.0% and 2.4%, respectively. These gains were supported by strong quarterly guidance across the tech supply chain and continued spending on digital infrastructure. The S&P 500 closed up 0.9%, with 87% of its components finishing in positive territory. Traders are interpreting the day’s action as a signal that macro uncertainty remains contained, allowing investors to favor established leaders in both growth and defensive sectors. The combination of stable energy prices, declining volatility, and earnings momentum has created a favorable environment for long-duration equities and capital deployment into high-quality names.