US stocks closed out the first half of 2026 with one of their strongest showings in years, as a powerful rally led by chipmakers and the broader artificial-intelligence trade propelled the major indexes to a standout quarter. But the momentum showed signs of fading at the turn of the new quarter, with futures pointing lower amid geopolitical tensions and a heavy slate of upcoming economic data.
The blue-chip Dow Jones Industrial Average rose 8.9% over the first six months of the year, its strongest first-half performance in five years. The gains capped a remarkable stretch for equities, which shook off a bout of early-year volatility to grind higher through the spring and into the summer, rewarding investors who stayed the course despite lingering uncertainty over interest rates and global tensions.
The technology-heavy Nasdaq Composite was the standout, surging around 21% during the second quarter to close near 26,214, its best quarterly performance in about six years. The advance was driven in large part by semiconductor stocks and companies tied to the AI build-out, which have benefited from insatiable demand for computing power and the capital pouring into data centers. That leadership underscored how central the AI theme has become to the market's direction.
The rally reflected a broader shift in where investors see opportunity. Wall Street has increasingly rewarded the companies supplying the AI boom, from chipmakers to infrastructure providers, and the strength in those names did much of the heavy lifting for the indexes over the quarter. The result was a first half that defied earlier expectations of a more difficult year, as enthusiasm for the technology overcame concerns about a hawkish Federal Reserve.
Yet the mood turned more cautious as the new quarter opened. Stock futures reversed lower after the strong first half, with investors weighing renewed tensions surrounding the Middle East and bracing for a run of key economic releases. The pullback suggested that after such a strong run, markets were vulnerable to profit-taking and to any headlines that might challenge the prevailing optimism.
Much of the near-term focus falls on the labor market and monetary policy. Investors are awaiting a closely watched US jobs report, due later in the holiday-shortened week, along with a scheduled appearance by the Fed chair, both of which could sway expectations for the path of interest rates. With the central bank having taken a hawkish turn, any surprises in the data or in the chair's remarks have the potential to move markets meaningfully.
The setup leaves the second half poised between strong momentum and evident risks. The AI-driven advance has been broad and powerful, but stretched valuations in some corners, a hawkish Fed and geopolitical uncertainty all loom as potential headwinds. Whether the market can build on its first-half gains will likely depend on how those forces play out, starting with the incoming data and the tone set by policymakers in the days ahead.