Will the Supreme Court overturn gay marriage?

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

- Legal baseline: Same‑sex marriage remains the constitutional rule under Obergefell v. Hodges (2015). To reverse that outcome the Court must (a) be presented with a case that squarely poses the Obergefell question, (b) grant certiorari, and (c) assemble five votes to overturn or substantially narrow the precedent. Overturning a major precedent is legally straightforward in the sense that it is within the Court's power, but practically difficult because of vehicle and political constraints.

- Institutional behavior: The Court’s willingness to overturn precedent increased after Dobbs (2022), which demonstrates that a conservative supermajority is prepared to reverse major substantive‑due‑process holdings. That raises the baseline risk that other precedents like Obergefell could be revisited when a suitable case arrives.

- Statutory and political constraints: The Respect for Marriage Act (RMA) provides federal recognition and requires interstate recognition of marriages performed in other states, reducing immediate practical impact even if Obergefell were reversed. RMA is a statute that Congress could change later and does not bind the Supreme Court. Additionally, public support for same‑sex marriage is high and bipartisan backlash to an overt reversal would be substantial and electorally salient.

- Timing and mechanics: The path most likely to produce an overturn is not a random appeal but a targeted lower‑court decision or a carefully framed cert petition (for example, a case where marriage licenses are denied under state law and the issue is squarely presented). Absent such a clean vehicle the Court is unlikely to take up and decide to overturn Obergefell on its own initiative.

Synthesis (Stage 1 conclusion): Balancing the higher institutional willingness to overturn substantive‑due‑process precedents with the institutional hurdles (vehicle, RMA, political backlash), I estimate an independent probability of **~18%** that the Supreme Court will overturn nationwide marriage equality before 2029. This reflects non‑trivial tail risk driven by Court composition and precedent reversal behavior, but it is still a low‑to‑moderate probability because of the substantial countervailing constraints.

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

- Market snapshot: Current market price places "Yes" at 7% and "No" at ~93%, with event volume ~90.6k contracts. The market is signaling that overturn is unlikely in the available timeframe.

- Why the market might be underpricing risk (my view): Traders often anchor to statutory protections and present absence of a clean vehicle; they may give outsized weight to the RMA and public opinion as near‑insurmountable barriers. Those are real constraints, but they do not eliminate the possibility a litigant produces a narrow but decisive vehicle (for example, a case raising the question under different constitutional text or emphasizing religious objections that cast the issue in a new procedural posture). The post‑Dobbs era shows the Court will take and decide consequential precedent cases when a majority is motivated.

- Why the market might be reasonably priced or even conservative (alternative view): The market price could correctly incorporate low likelihood because overturn would generate extreme political backlash, complicate federal enforcement, and is redundant in many respects given RMA protections. Traders may also be anticipating that the Court prefers narrower rulings that avoid a full‑scale national reversal.

- Conclusion on pricing: I judge the market price (7%) to be somewhat low relative to my independent assessment (18%) — not wildly off, but likely underpricing the non‑negligible chance that a suitable case appears and that five justices are willing to fully reverse Obergefell. The gap (11 percentage points) reflects market emphasis on statutory protections and vehicle scarcity; a disciplined trader who expects a clean vehicle to emerge would view the market as offering value to buy "Yes" exposure. However, uncertainty about case development and political constraints justify why many traders anchor below 10%.

- Trading implication (optional): If you are positioned to capture small edges and can tolerate the long tail and legal timing uncertainty, buying yes at 7% has positive expected value under my model. If you prefer to avoid litigation timing risk, the market price is consistent with a conservative view that overturn is unlikely.