This sleeper AI risk for stocks in 2026 has got Wall Street talking over the past few weeks

Wall Street strategists are warning that a potential pullback in corporate buybacks in 2026 — driven in part by hyperscalers borrowing heavily to finance AI/data‑center buildouts and thus consuming free cash flow — could remove an important source of demand supporting the three‑year equity rally. So far 2025 authorization activity remains near record levels (EPFR shows nearly $1.3 trillion announced), but only Alphabet among the hyperscalers has authorized major new repurchases (up to $70 billion) while Apple has authorized $100 billion; buybacks can account for roughly 3–10% of daily market volume, so a slowdown would be a marginal but meaningful headwind, according to Mizuho’s O’Regan. Nomura’s Charlie McElligott also flagged the prospect of fewer Fed cuts as an additional risk, even as companies such as Nvidia continue aggressive repurchases (it reported $12.46 billion bought back in the most recent quarter).

Analysis

Wall Street strategists are flagging a sleeper risk for equities in 2026: hyperscalers borrowing heavily to fund AI/data-center buildouts could compress free cash flow and reduce share buybacks, according to Nomura’s Charlie McElligott. EPFR data show 2025 remains near record buyback activity with nearly $1.3 trillion announced year-to-date and notable authorizations including Apple’s $100 billion and Alphabet’s $70 billion, but AI-related firms have authorized fewer buybacks in 2025 versus 2024.

Corporate buybacks are an important demand source for the market—Mizuho’s Daniel O’Regan notes buybacks can account for roughly 3%–10% of daily market volume—and some market participants view a slowdown as a margin headwind rather than an existential threat. Nvidia’s aggressive execution ($12.46 billion repurchased in the most recent quarter) illustrates heterogeneity in execution versus authorization across the tech complex, and major indexes recently snapped a four-day losing streak.

The principal near-term risks are a material pullback in buybacks as large-cap AI spend crowds out repurchases and a potential disappointment on Fed rate-cut expectations, both highlighted by McElligott. Investors should therefore track buyback authorizations, capex and free-cash-flow guidance, and be prepared for higher volatility and reduced structural demand if hyperscaler buybacks decelerate into 2026.

Key Decisions for Investors

• Monitor quarterly buyback authorizations, capital expenditure and free-cash-flow guidance from hyperscalers (MSFT, AMZN, META, ORCL) and consider hedging or trimming exposure if authorizations and FCF trend materially lower
• Prefer or accumulate names with confirmed large repurchase programs and active execution—notably AAPL (authorized $100bn), Alphabet (up to $70bn) and NVDA (reported $12.46bn repurchased last quarter)—as structural demand support
• Adjust position sizing and use options or volatility hedges to guard against reduced liquidity since buybacks can represent 3%–10% of daily market volume, which could amplify moves if repurchases slow
• Monitor Federal Reserve communications for fewer-than-expected rate cuts, because combined with a buyback slowdown this could exert additional downside pressure and warrant a tilt to quality, cash-flow-positive assets