Wall Street Expects the S&P 500's Earnings Growth Rate to at Least Get Cut in Half in 2027. Should Investors Be Worried?

Analysts expect S&P 500 earnings to grow 32%–35% year over year in 2026, then about 15% in 2027—a solid rate but a sharp slowdown. AI capex is still projected to rise from roughly $800 billion to $1.1 trillion, though slower spending growth and rising depreciation could pressure earnings at hyperscalers and suppliers. With the Shiller CAPE above 40.5, the article warns that elevated valuations leave the market vulnerable if investors question future earnings growth.

Analysis

The key exposure is not simply slower index earnings growth; it is a potential rotation in who captures AI economics. If hyperscaler capex continues rising but grows more slowly, suppliers tied to incremental build-outs—most directly NVIDIA—could face estimate risk before hyperscalers face revenue risk. Meanwhile, depreciation converts prior investment into a growing earnings headwind for Amazon and Microsoft; the offset is whether AI services and productivity lift revenue and utilization quickly enough. That creates a widening gap between spending and monetization as the critical signal, not capex alone.

Near term, the market’s high sensitivity to estimate revisions makes even a deceleration in orders or weaker conversion into AI revenue capable of pressuring multiples. Over 1–3 months, track hyperscaler capex guidance, NVIDIA data-center growth and order visibility, and cloud growth relative to depreciation. Over 6–18 months, the bullish countercase is that installed capacity generates monetizable workloads, keeping returns on invested capital intact despite higher depreciation.

Contrarian point: decelerating capex growth is not declining capex, and a 2027 earnings-growth slowdown from an unusually strong base does not itself imply earnings contraction. The risk is that elevated index valuation leaves little tolerance for a miss; the opportunity is that a broad index hedge may overstate damage to firms converting AI spend into recurring revenue. The thesis weakens if cloud/AI revenue growth accelerates while capex remains robust, or if supplier order trends and earnings estimates stabilize.

Key Decisions for Investors

• Do not short the S&P 500 solely on slower projected earnings growth. Use a staged hedge only if forward estimate revisions broaden lower or hyperscaler guidance signals actual capex reductions; confirm the move against rates and oil, which can independently drive index weakness.
• Consider a conditional relative-value position: underweight NVIDIA versus a diversified long in Microsoft or Amazon if chip-order expectations soften while cloud monetization remains firm. Avoid initiating before checking relative valuation, positioning, and order/backlog data; the trade is falsified by renewed upward revisions to NVIDIA demand alongside accelerating cloud AI revenue.
• Monitor Amazon and Microsoft depreciation growth against cloud revenue and operating-income trends. Treat rising depreciation as a warning only if it outpaces monetization or utilization; otherwise it may reflect productive capacity rather than impaired returns.
• Watch hyperscaler capex guidance, cloud growth, NVIDIA data-center orders, and consensus earnings revisions over the next 1–3 months. A cut to capex plans or repeated downward estimate revisions would strengthen the bearish case; stable spend and improving revenue conversion would argue against it.