From Apprehension to Euphoria: Markets Rally on De-Escalation and AI Strength
Markets are often defined not by what happens, but by how sharply expectations change. The second quarter of 2026 offered a vivid illustration of that principle, as investor sentiment swung from apprehension to euphoria within a matter of months.
After a rocky start to the year, the S&P 500 index surged approximately 15% during the second quarter. This marked the strongest three-month advance for the broader market since the pandemic rebound rally in the second quarter of 2020. Thanks to the strength of the second quarter, the broader market managed to post an impressive gain of roughly 10% in the first half of the year. Even more impressive, however, was the performance of smaller-cap stocks. The Russell 2000 index of small cap companies gained more than 21% during the first half, its best performance since 1991.
The quarter’s rally was sparked, in large part, by the de-escalation of conflict abroad.
The quarter’s rally was sparked, in large part, by the de-escalation of conflict abroad. The geopolitical conflict in the Middle East, which had roiled markets and sent oil prices toward $100 a barrel in the first quarter, moved toward resolution as the Strait of Hormuz began to reopen and crude prices retreated into the high $60s. That relief, combined with fading concerns about an AI spending slowdown, allowed investors to refocus on exceptionally strong fundamentals. First-quarter S&P 500 earnings grew nearly 28% year over year on revenue growth of roughly 12%. These are among the strongest results in several years, with technology and communication services companies once again leading the way.
As in recent quarters, the generative AI buildout remained the market’s central storyline. Semiconductor and memory-related stocks were the standout performers during the first half of 2026, with companies tied to AI infrastructure posting extraordinary gains as demand for high-end memory chips outpaced supply.
Factors beyond AI enthusiasm also helped buoy investor confidence. The labor market remained resilient, capital investment stayed strong, and recession expectations faded as the quarter progressed.
The labor market remained resilient, capital investment stayed strong, and recession expectations faded as the quarter progressed.
That said, familiar caution flags remain. Valuations across AI-related sectors continue to stretch further from historical norms. The market’s late-June pullback in semiconductor stocks is a reminder that enthusiasm for the AI theme can reverse quickly, even amid otherwise favorable conditions. As previously noted, today’s data-center buildout carries echoes of the late-1990s fiber-optic expansion. The underlying technology is real and transformational, but the risk of overbuilding ahead of demand has not disappeared.
At Riverbridge, our focus remains on companies that deploy artificial intelligence to strengthen their competitive positions rather than those simply supplying the infrastructure behind it. We continue to see tangible evidence within our portfolios of AI-driven efficiency gains translating into margin expansion and durable earnings growth. In our view, this kind of fundamental progress is far more likely to sustain shareholder value than speculative enthusiasm alone.
Looking to the second half of 2026, the foundation for continued equity gains appears largely intact. Earnings growth remains robust while productivity gains are helping offset lingering inflation pressures. The labor market, while showing some signs of softening, remains healthy overall. Consumer spending has held up despite higher energy costs earlier in the year. Midterm election-year dynamics, the path of the Fed’s policy, and the sustainability of AI-related capital expenditures will likely be the key variables to watch in the months ahead. As always, we believe investors are best served by resisting the temptation to chase short-term momentum and instead remaining committed to a disciplined, long-term approach centered on high-quality, durable businesses.
Information in this newsletter is not intended to be used as investment advice. Mention of companies/stocks herein is for illustrative purposes only and should not be interpreted as investment advice or recommended securities. The securities identified do not represent all of the securities purchased, sold or recommended and the reader should not assume that any listed security was or will be profitable. Past performance is not indicative of future results.
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