US market news

The quiet finale to an AI-fuelled year on Wall Street

Denila Lobo
December 31, 2025
2 minutes read
The quiet finale to an AI-fuelled year on Wall Street

On the last trading day of 2025, Wall Street feels more like a library than a trading floor. Screens glow, prices flicker, but the shouts are gone; this is a market tying its shoelaces after a marathon, not sprinting for one last medal. The S&P 500 sits near record levels after an AI‑driven surge that has defined the year, yet today it barely moves, held in place by thin holiday volumes and traders already halfway to New Year’s Eve.

All year, artificial intelligence has been the main character. Big Tech poured hundreds of billions into data centres and chips, turning AI from a buzzword into a balance‑sheet line item that moved markets. As one strategist put it, “AI didn’t just lift tech; it rewired the entire market narrative,” with gains spilling into everything from infrastructure to commodities. The S&P 500’s repeated record highs on low‑volume days became a symbol of 2025: a rally built on solid earnings and optimism, but often amplified by algorithms rather than human conviction.

Yet even in this glow, doubts keep surfacing. The New York Times noted that valuations in some AI names now echo the loftiness of the dot‑com era, prompting warnings that “there is always a faction that claims this time is different.” CNN reported that some investors are openly asking whether the huge AI spend will really deliver returns big enough to justify current prices, especially if growth slows or sentiment turns. For now, the bulls are still in charge, but they know exactly where the exit doors are.

Illustrative S&P 500 path in 2025, highlighting the steady AI-driven bull run into year-end

A thin market and a thick fog of uncertainty

Today’s session is the classic holiday‑thinned market: fewer traders, shallower order books, and price action that can look dramatic even when the news flow is not. One market commentator described these days as having “volatile magic”, where a single large order can slice through several price levels because there simply is not much standing in its way. That helps explain why the major indices slipped earlier this week as tech took a breather; a modest wave of profit‑taking looked bigger than it really was.

Behind the quiet tape sits a much louder debate about interest rates and the Federal Reserve. Fed minutes suggest officials are in no hurry to cut, with some policymakers arguing that rates might need to stay on hold “for some time” given sticky inflation. At the same time, 2026 looms as a year of upheaval: Jerome Powell’s term as chair ends in May, and President Donald Trump is preparing to name a successor, a decision that could reshape the path of rates and the Fed’s independence. As MUFG strategists put it when looking at the dollar, next year will be driven “primarily by the US economy and Fed policy,” and equity investors know that applies to them too.

For an investor watching from India, the message is simple: this is a day for patient limit orders and portfolio housekeeping, not heroics. The real action will come when full volumes return in January, AI giants start guiding for 2026, and a new Fed era comes into focus. Today is just the quiet final chapter of a very loud year.

Indicative 2025 volumes showing how liquidity tends to thin out into the final months of the year

Disclaimer: The views and recommendations made above are those of individual analysts or brokerage companies, and not of Winvesta. We advise investors to check with certified experts before making any investment decisions.

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