S&P 500 predictions December 2025: Wall Street’s year-end stock rally is facing challenges. Investors are worried about high AI valuations and slowing economic growth. Mixed signals from the Federal Reserve are also causing unease. Despite historical December gains, the S&P 500 is on track for a monthly loss. Tech stocks are particularly vulnerable due to AI rivalry concerns.
S&P 500 predictions December 2025: Wall Street’s long-standing belief in a year-end stock market rally is being tested as investors weigh the risks of lofty AI valuations, slowing economic growth, and mixed signals from the Federal Reserve. While December historically favors gains, the S&P 500 is still on track for a monthly loss despite a modest rally on Monday, as per a report.
Historically, December has been one of the strongest months for equities. Since 1945, the S&P 500 has gained an average of 1.5% for the month, trailing only November, according to CFRA Research. This year, however, the benchmark index is on pace for a monthly decline, challenging long-held beliefs about seasonal strength, especially as traders grow increasingly uneasy about AI spending and valuations, as per a Bloomberg report.
The shift in sentiment was evident Tuesday as US stocks retreated, led by losses in major technology names amid mounting anxiety over the AI chip rivalry between Nvidia and Alphabet. Demand for hedges against Big Tech losses is near its highest level since August 2024, while the VIX Index remains above 20, a level widely viewed as a sign of elevated market stress.
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The S&P 500 slipped 0.2% in late-morning trading Tuesday, unable to build on a two-day rebound that followed hints from Federal Reserve officials of support for an interest rate cut next month. Even with that bounce, the index is still down roughly 2% for December and is on track for its first monthly drop since April, well below its long-term December average.
Market veterans say hitting 7,000 before year-end now looks unlikely. Ed Yardeni of eponymous firm Yardeni Research pointed out that the S&P 500 is unlikely to hit 7,000 by year-end, which would represent about 4% gain from current levels, largely due to some profit-taking in AI-related stocks, as per the Bloomberg report.
Uncertainty over AI remains a major driver of the stock market’s turbulence. High valuations, intense spending, circular financing structures, and lofty expectations have fueled concerns about the durability of the AI boom.
Dennis Debusschere, chief market strategist at 22V Research, warned that “Uncertainty on AI payoffs and upside rate risk will likely limit how much the market can rally into year-end,” as quoted by Bloomberg.
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Meanwhile, broader market positioning is sending mixed signals. Deutsche Bank data shows overall equity exposure turned underweight last week for the first time since July. At the same time, mega-cap tech and growth stocks continue to outperform the average stock, leaving them potentially vulnerable, according to strategist Parag Thatte, reported Bloomberg.
For those optimistic about December, historical data provides some reassurance. JPMorgan Chase reports that in years when the S&P 500 rose at least 10% from January through September but declined in November, December has historically delivered gains every time since 1950.
JPMorgan’s head of global market intelligence, Andrew Tyler said that, “We remain tactically bullish,” citing resilient macroeconomic data, positive earnings growth, and a thawing trade war, and added that, “Additionally, historical seasonality stats also suggested a rebound,” as quoted by Bloomberg.
Why will the S&P 500 be down this December?
AI spending concerns, tech weakness, and broader market stress have weighed on the index.
Why is the usual year-end stock rally in doubt this year?
Because investors are nervous about high AI valuations, slowing growth, and unclear signals from the Federal Reserve.
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