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Goldman Sachs

May 19, 2026

Cause For Some Momentum Sobriety

Market ReportEquitiesMacro Economic IndicatorsInformation TechnologyCommunication Services

Goldman Sachs analysis indicates that while the S&P 500 rally is exceptionally narrow and driven by TMT momentum, it is currently supported by robust earnings growth unlike past bubbles.

Key Takeaways

  • 1.The S&P 500 rally is heavily dominated by TMT names (Tech, Communication Services, AMZN, TSLA), accounting for 87% of YTD returns.
  • 2.Market breadth has narrowed to its tightest level in decades, increasing drawdown risk, though not necessarily signaling an immediate end to the bull market.
  • 3.Unlike previous momentum peaks, the current rally is justified by significant upward revisions in earnings estimates, specifically in AI-related infrastructure and Energy.

Table of Contents

  • Executive Summary
  • Check-down of Salient Points
  • Visual Illustrations and Tables
  • Narrow Breadth Analysis
  • Momentum Persistence and Historical Context
  • Broader Market and Earnings Implications

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Authors

Tony PasquarielloTyler Durden

Securities

NVDAGOOGLMUAMZNSPX

Themes

AI Dominance in Equity MarketsMarket Concentration and Breadth RiskEarnings-Driven Valuations vs. Speculative Bubbles

Regions

North AmericaUnited States