The Nasdaq Composite has entered November carrying its worst monthly performance since March 2025, according to the latest market report. The message for US equity traders is clear: technology momentum is being challenged from two directions at once—uncertainty over the cost of AI infrastructure and renewed concern that interest rates may move higher.

This is not simply a question of whether artificial intelligence remains a powerful technology theme. It is a valuation and capital-allocation test. Investors are now weighing the scale of spending required to build AI infrastructure against the prospect of additional Federal Reserve rate hikes, a combination that can make growth-oriented equities more difficult to price.

AI spending is meeting a tougher market test

Technology stocks sold off as investors became more concerned about the cost of AI infrastructure spending. That concern changes the market conversation. Instead of focusing only on the potential of AI demand, traders are being pushed to examine the resources required to support it.

Infrastructure spending can involve substantial commitments before the economic benefits are fully visible. When investors question the cost of that buildout, enthusiasm can give way to scrutiny. The result may be greater differentiation within technology exposure, with momentum positioning becoming more sensitive to evidence that spending can translate into durable returns.

For traders reviewing mega-cap AI exposure, the key issue is not whether the theme has disappeared. The immediate issue is whether elevated expectations can withstand a more demanding assessment of spending, timing and financial impact. The Nasdaq’s worst month since March 2025 suggests that this reassessment has already affected broad technology sentiment.

Rate-hike risk raises the valuation pressure

Federal Reserve speakers kept the possibility of additional rate hikes in play, adding another source of pressure to growth-oriented equities. Higher rates can weigh on technology valuations because they increase the discount applied to future earnings and cash flows. Businesses whose expected benefits are further into the future can therefore become more vulnerable when the market’s rate outlook shifts.

That mechanism matters for momentum traders. A technology group can remain structurally attractive while still losing short-term support if investors reduce the valuations they are willing to assign to future growth. When the rate narrative turns more restrictive, positioning can unwind quickly, particularly where expectations have become concentrated.

The combination of AI-cost concerns and rate-hike risk also creates a more complicated backdrop than either issue alone. Higher rates can pressure valuations, while questions about infrastructure spending can challenge the assumptions supporting those valuations. Together, they may encourage traders to demand stronger evidence before extending technology momentum positions into November.

What the November setup means for positioning

The immediate implication is a shift from broad enthusiasm toward selectivity. Traders assessing mega-cap AI exposure may focus more closely on the relationship between infrastructure commitments and eventual economic returns. The market may also place greater weight on interest-rate commentary, because another signal supporting hikes could intensify pressure on growth-oriented equities.

Defensive and commodity-linked alternatives may attract attention as traders reassess concentration in technology, although the current setup does not establish that either group will outperform. Their relevance is primarily portfolio-contextual: when technology momentum weakens, market participants often examine exposures that may respond differently to valuation and rate concerns.

For now, the Nasdaq’s monthly performance is the headline signal. Its worst month since March 2025 marks a meaningful deterioration in technology-sector momentum, while the unresolved AI spending debate and Federal Reserve rate-hike risk leave traders with two active reasons to remain cautious. November’s direction may depend on whether those concerns broaden further or begin to stabilize.