Alphabet and Amazon Drive Majority of S&P 500 Earnings Growth

Investor Ross Gerber has highlighted data from FactSet indicating that Alphabet and Amazon are the primary engines behind the current S&P 500 earnings momentum. For the second quarter of 2026, the S&P 500 reported a blended earnings growth rate of 50.4%. However, stripping away the contributions of these two tech giants reveals a much leaner figure. Without Alphabet and Amazon, the growth rate for the remaining 498 companies drops significantly to just 32.0%. This disparity highlights a heavy reliance on a few specific entities to maintain overall market health.

The concentration of earnings growth stems largely from the massive investments and returns in the artificial intelligence sector. Alphabet and Amazon have successfully leveraged their cloud infrastructure and AI integration to outperform the broader market. While many sectors struggle with stagnant demand, these mega-cap firms continue to scale their operations and capture significant market share. This trend has created a top-heavy market structure where the performance of the entire index is tethered to the quarterly reports of a handful of companies. Analysts suggest this makes the index vulnerable to sector-specific shocks.

The dominance of US tech giants has direct consequences for Indian institutional investors and retail traders holding global portfolios. Many Indian mutual funds and Exchange Traded Funds (ETFs) are heavily weighted toward these mega-cap stocks to capture international growth. If sentiment shifts or these giants face regulatory hurdles, the impact will ripple through Indian-held overseas assets. Furthermore, the reliance on AI for earnings growth sets a high bar for Indian IT firms like TCS and Infosys. These domestic players must now prove they can deliver similar AI-driven value to remain competitive in global equity allocations.