Which Supreme Court justices will resign during Trump's term?

**Stage 1 — Blind analysis (ignore market prices):**

Samuel Alito (born 1950) will be 75 at the start of Trump's term and 78–79 by its end. Historically, Supreme Court justices commonly leave in their mid-to-late 70s, often timing retirements to a same-party president to secure an ideologically compatible successor. That dynamic strongly favors a resignation during a Republican presidency if a justice is already in the age/health window where retirement is plausible.

Concrete signs point in both directions. *For* resignation: Alito is squarely within the age band where many justices step down, and conservative political actors have strong incentives to encourage retirements while a Republican president holds the nomination power. The retracted NPR retirement report, even if inaccurate, signals active chatter and possible behind-the-scenes discussions that markets and pundits pick up on regularly. *Against* resignation: Alito remains active on the Court (recent one-sentence orders and continued participation), there is no confirmed announcement or major health report, and some justices prefer to maximize influence by staying on the bench into their late 70s/80s. Additionally, when the presidency and Senate are aligned with a justice's preferences (as with a Trump presidency), the urgency to time a retirement to secure ideological replacement is reduced relative to retirements designed to avoid a later Democratic president.

Weighing the evidence: the structural incentive to retire during a friendly presidency raises probability materially above coin-flip levels, but absent clear health issues, explicit plans, or reliable leaks, the chance is not overwhelming. I break my blind estimate into rough temporal buckets: about 20–30% chance of resignation in the near term (next 6–12 months), ~35–45% chance of resignation in the mid-term window (calendar 2027), and smaller incremental chance in late 2027–early 2029. Aggregating these leads to an independent point estimate of **60%** that Alito resigns at some point before Jan 20, 2029.

**Stage 2 — Market calibration (look at prices):**

Current market prints show Yes = 0.68 (68%). My independent 60% is lower than market by ~8 percentage points. Possible reasons the market is higher:

- **Private information / chatter:** The retracted NPR item and other informal reporting may have seeded sustained belief among traders that retirement discussions are active; markets often overweight anecdotal leaks even when they are unconfirmed. - **Aggregation of correlated expectations:** Traders may be pricing not just Alito’s individual calculus but an expectation of multiple conservative retirements (e.g., pairing Alito with Thomas or planning cascades), which boosts the marginal probability assigned to any single justice stepping down during the term. - **Liquidity and sentiment effects:** With significant volume ($92k+ contracts) and strong partisan interest, traders could be biased toward a conservative-advantage narrative (i.e., retirements during a Republican presidency), pushing prices above my neutral structural estimate. - **Risk premium / hedging flows:** Some participants may buy Yes as a hedge to broader political exposure, elevating the market price above pure fundamentals.

None of these explanations prove the market is correct. If you believe market participants have access to credible off-the-record signals from clerks, court insiders, or the justice’s circle, you should defer to the market. If you instead weight observable activity and absence of confirmed plans more heavily, my 60% is the more cautious baseline. There may be an exploitable edge if you have conviction that current prices overstate the immediacy/likelihood of retirement; conversely, if you think private information is real, the market price may be justified or even conservative.

Recommendation based on calibration: the spread (68% market vs. 60% independent) is modest. It does not present a large, risk-free arbitrage unless you possess additional on-the-ground intelligence. Traders seeking an edge should watch for verifiable leaks, changes in Alito's public activity, or coordinated conservative messaging campaigns — any of these would justify a quick re-rating.