JPMorgan: 66% Probability of Democratic Sweep, S&P 500 Gain/Loss Forecasts Released
nashnova research
JPMorgan maps four midterm-election outcomes to S&P 500 ranges, putting a Democratic sweep at 66% probability — yet no scenario moves the index more than about one percent either way. The real variables are AI regulation and long-bond yields.
The most likely outcome — so why can't the market price it?
JPMorgan assigns the "blue wave" — Democrats winning both chambers — a 66% probability. The S&P 500 range: −0.25% to +0.50%.
This means → the single most likely result is also the foggiest to trade — direction is genuinely unclear.
The bank expects AI-related stocks to face selling pressure on fears of tighter regulation of data centers and tech firms, but argues no bill restricting AI expansion could survive a Trump veto.
In plain terms = even a full Democratic sweep hits a presidential wall, so AI regulation is more "scare" than "substance"; JPMorgan recommends buying the tech dip.
A split Congress — why is gridlock good news?
The second-likeliest scenario is a split Congress (Democrats hold the House, Republicans keep the Senate) at 26% probability. S&P 500: +0.5% to +1%.
This means → neither party can push major policy through, and markets read that as relief — no new policy risk is itself a positive.
JPMorgan notes long-bond yields could still drift lower, and "investigation risk" tied to Trump-linked donors would persist.
Republicans hold both chambers — lowest odds but biggest market cheer?
A "red wave" — Republicans keeping both chambers — sits at just 7% probability, yet is the most equity-friendly outcome: S&P 500 +1% to +1.25%.
This reflects a clear market preference: no new regulatory risk = maximum upside.
The trade-off: long-bond yields could rise, and Trump would likely maintain his hawkish stance on Iran.
The 1% scenario — nearly impossible but worth knowing?
Republicans controlling the House with Democrats taking the Senate has only a 1% probability. S&P 500: +0.25% to +0.75%.
This setup also means legislative gridlock, but could trigger budget disputes or even a government shutdown, with an active Senate wielding investigation powers.
In plain terms = a "more fighting than governing" script — extremely unlikely, but if it materializes, volatility comes from political deadlock itself, not policy.
All four side by side — what should traders actually watch?
JPMorgan's bottom line: regardless of outcome, Election Day itself delivers much-needed certainty to markets.
Across all four scenarios, the widest S&P 500 upside is just +1% to +1.25%; the maximum downside is only −0.25% — the short-term swing band is remarkably narrow.
This means → the real trade isn't the election result itself but the market's re-pricing of AI-regulation expectations and long-bond yield direction once the dust settles.
市场有风险，内容仅供研究参考，不构成投资建议。