S&P 500: Air Escapes AI Stocks - Deep Rotation Confirmed at Quarter-End

As this quarter draws to a close, the S&P 500 declines under the weight of "overinflated" AI mega-caps—while Palantir, a symbol of defense AI, faces a severe valuation test. The value-growth rotation that began on June 23 is now confirmed.

The Fact

The S&P 500 declined in this final session of June 2026 (Seeking Alpha, 06/29), focusing on large-cap AI stocks (Nvidia, Microsoft, Meta, Alphabet), whose P/E ratios remain at historical levels. This movement follows the sell-off on June 23 (Nasdaq-100 -3% in the session) and confirms the sector rotation from value to growth identified in previous publications. Seeking Alpha simultaneously notes that "Bears Are Missing The Forest For The Tech Trees"—the contrarian thesis argues that the tech pullback masks a positive rotation, not a recession. Palantir (PLTR) is the subject of an independent analysis highlighting that its stretched valuation must now be justified by the numbers, for a dual military-civilian company whose growth remains strong but revenue base narrow.

Our Take

The RSP/SPY indicator (equal-weight vs. cap-weight S&P 500) remains in a bullish divergence: small and mid-cap stocks are holding up better than the Mag7, confirming market broadening. The quarter-end close on June 30 is decisive—a Nasdaq below 19,000 points would mark a significant quarterly capitulation. Eleanor Whitfield maintains her base scenario (55%): a selective rebound post-Q2 if Mag7 AI revenues surprise to the upside in mid-July—otherwise, the rotation deepens toward discounted European stocks and utilities.

To Watch

Quarter-end close on June 30, Mag7 Q2 results (mid-July), NFP on July 4, FOMC on July 29-30, RSP/SPY ratio.