Earnings strength was the primary driver of the S&P 500’s returns in the first half of 2026, with AI‑linked technology earnings doing most of the heavy lifting.
Framing the first half of 2026
The S&P 500 finished the first half of 2026 up roughly 10%, marking one of its stronger first‑half performances since the immediate post‑pandemic rebound years. That advance came alongside a series of new all‑time highs and about two dozen record closes, underscoring how rapidly index‑level prices adjusted to improving profit expectations.
Strategists have characterized this as an “earnings‑driven rally,” not a speculative melt‑up based solely on rising valuation multiples. While the forward price‑to‑earnings ratio has remained elevated around 21x, most of the index’s price appreciation has simply tracked surprisingly strong realized and expected earnings growth.
Why earnings strength has mattered so much in H1 2026
The market narrative in the first half of 2026 shifted from macro‑centric concerns (geopolitics, oil prices, and the future path of policy rates) to micro‑level confidence in corporate profit resilience. At one point in the first half of the year, the S&P 500 was down more than 7%, as investors worried that the Iran conflict and elevated energy prices would compress margins and derail capex cycles. Instead, first‑quarter earnings season delivered a decisive upside surprise, with beat rates north of 80% and aggregate earnings growth near three‑decade highs.
Strategists have argued that “earnings matter more than just about anything, except maybe interest rates” in explaining the first‑half rally, and 2026 so far has been a textbook case. As geopolitical fears faded and rate expectations stabilized, returns followed the earnings expansion: sectors with the strongest upward revisions and realized EPS beats led performance, and laggards tended to be areas with weaker margins or slower earnings growth.
What about valuations?
The S&P 500’s forward P/E began the year near 20x and has drifted to about 21x, and thus, only a small portion of the S&P 500’s gains is attributable to investors “paying more” for each dollar of earnings. The bulk of the higher move in the S&P 500 index for the first half of 2026 reflects higher “E” in the P/E equation, both realized trailing earnings and upward revisions to forward estimates.
The earnings engine: what happened under the hood
Earnings momentum was both powerful and broad in Q1 2026, but with clear leadership from technology, especially semiconductors and AI‑infrastructure beneficiaries. First‑quarter S&P 500 earnings increased 27% year‑over‑year, the fastest growth rate since the 2021 reopening period. Revenue growth was solid but more modest, in the high‑single‑digit range, meaning a substantial portion of the earnings upside came from margin expansion and operating leverage rather than simple top‑line acceleration.
Across sectors, all major S&P 500 industries are expected to deliver positive earnings growth in 2026, the first time this has occurred since 2018, though the pace varies widely. A number of sectors and industries are projected to post double‑digit earnings growth for the full year, with technology, aerospace, autos, basic materials, transportation, and industrials near the top of the list. That backdrop has helped investors view the first‑half rally as fundamentally grounded: price gains reflect a repricing of the index to a higher level of sustainable profitability. More specifically, consensus estimates are for full‑year S&P 500 earnings growth north of 20%, with several analysts expecting earnings growth for the year in the 22–24% range. Tech sector earnings are expected to grow 20% for the year—with some estimates even higher depending on AI exposure.
Several dynamics continue to make earnings the focal driver in 2026:
- AI capex and semiconductors: AI‑related infrastructure spending is estimated to account for half of the S&P 500’s expected earnings growth in 2026. Semiconductor companies alone are projected to contribute 39% of the index’s year‑over‑year earnings growth, with Micron and Nvidia among the largest single‑name contributors.
- Margin resilience: Revenue growth in the high‑single‑digits combined with cost efficiencies, often enabled by technology and automation, is allowing many firms to expand operating margins despite wage pressure and input cost volatility.
- Estimate revisions: Positive estimate revisions across multiple sectors, especially tech and industrials, reinforce investor conviction that the earnings recovery is durable, not transitory.
The role of AI‑driven earnings: concentration and opportunity
An important nuance for the first half of 2026 was the degree of concentration in earnings leadership. AI hyper-scalers and key semiconductor names have contributed a disproportionate share of index‑level earnings growth, raising questions about diversification, risk management, and the sustainability of returns.
Goldman Sachs and other research providers estimate that AI infrastructure investment will account for half of the S&P 500’s earnings growth this year, with AI‑heavy platforms like Alphabet, Amazon, and Meta expected to drive about 70% of total earnings growth. On top of that, Micron and Nvidia together are projected to contribute a third of index‑level EPS growth, underscoring how dependent aggregate profit expansion has become on a handful of names.
Comments from an allocation perspective
From an allocation perspective, the first half of 2026 has underscored several key points:
- Earnings concentration can coexist with broad participation. While the headline narrative has centered on semis and AI, industrials, financials, and even parts of health care began to participate more convincingly by late Q2 as earnings results and guidance improved.
- Expect a trickle-down effect from the large amount of AI infrastructure investment helping drive earnings in other sectors and industries of the economy.
- Quality of earnings matters. Investors have rewarded companies delivering not only high EPS growth but also clean, cash‑flow‑supported numbers, disciplined capital allocation, and credible forward guidance.
- Valuation discipline remains important. Even with an earnings‑driven tape, segments of the AI complex have moved to demanding valuation levels, making the relationship between future earnings delivery and current pricing critical to second‑half outcomes.
For clients, the takeaway is that 2026’s first‑half rally was driven by real profit growth, but the sources of that growth are more concentrated than the index label “S&P 500” might suggest. That reality supports the approach we take, staying invested in the earnings leaders driving this cycle through broad market exposure, while relying on diversification to manage the natural unevenness beneath the surface.
Disclosure:
This material is provided by Gryphon Financial Partners, LLC (“Gryphon”) for informational purposes only. It is not intended as a substitute for personalized investment advice or as a recommendation or solicitation of any particular security, strategy, or investment product. Facts presented have been obtained from sources believed to be reliable, though Gryphon cannot guarantee their accuracy or completeness. Gryphon does not provide tax, accounting, or legal advice. Individuals should seek such guidance from qualified professionals based on their specific circumstances.