JPMorgan: Market Breadth Rebounds, S&P 500 Poised for Excess Returns
nashnova research
The share of S&P 500 stocks hitting 20-day highs has crossed 50% for the first time since Q2 2025; JPMorgan argues this breadth signal, combined with midterm-election seasonality, sets up excess returns in the months ahead.
What does "market breadth" actually measure?
Market breadth — the share of stocks in an index rising in unison — is the key gauge of whether a rally is real or hollow.
In the weeks before this signal, the S&P 500 hovered near record highs, yet more than 80% of its constituents had quietly slipped into correction territory. The index rose; most stocks fell.
This means → the surface-level high masked hidden damage: a handful of mega-caps were propping up the entire index.
Why does JPMorgan read this breadth recovery as bullish?
The share of S&P 500 stocks making 20-day highs has risen above 50% — the first time since Q2 2025, when the market was staging a historic rebound from the tariff-shock selloff.
JPMorgan strategists Kriti Gupta and Nick Roberts wrote Friday: improved breadth plus historical outperformance patterns "lay the groundwork for excess returns after the midterms."
Historical data shows that after breadth recoveries of similar magnitude, the S&P 500 tended to extend its gains over the following three and six months.
In plain terms = the last time this many stocks strengthened together, the market kept climbing.
How bad is the AI-sector selloff?
Investor anxiety over AI capex cuts both ways: fear that Big Tech is spending too much on AI, and fear that any pullback in spending would hammer the data-center supply chain.
Amazon and Intel both signaled in their latest earnings that capex will keep rising next year — despite negative free cash flow. Tech stocks sold off again Friday.
The Nasdaq is down roughly 8% from its October high; the iShares Semiconductor ETF has fallen 28% from its 2026 peak; the Roundhill Neocloud ETF has plunged 43% from its recent high.
Why are midterm elections seen as a "clearing event"?
BlackRock data shows that since 1970, the S&P 500 has gained an average of 14% in the six months following a midterm election.
This means → once election uncertainty lifts, capital tends to rush back in, driving a concentrated rally.
JPMorgan recently raised its year-end S&P 500 target to 6,800, implying roughly 5% upside from current levels. [unverified]
What are the key tests for this bullish thesis?
Test one: whether the current breadth recovery holds. If breadth narrows again, the rally still depends on a few mega-caps — and the signal fails.
Test two: whether AI capex delivers returns in coming earnings seasons. If spending keeps rising with no payoff, confidence in tech will keep deteriorating.
In plain terms = JPMorgan has drawn an optimistic roadmap, but it only works if both conditions are met.
市场有风险，内容仅供研究参考，不构成投资建议。