# Adjacent News

Adjacent is an indexing and benchmarking company for prediction markets and event contracts.

- Canonical URL: https://adjacent.markets/indices/senr
- Public data API (no auth, CORS-open, 15-min delayed): https://api.adjacent.markets/api/v1/public
- MCP server (Streamable HTTP): https://mcp.adjacent.markets/mcp (docs: https://docs.adjacent.markets/explore/mcp ; skill: /.well-known/agent-skills/use-mcp/SKILL.md)
- API docs (machine-readable, Mintlify): https://docs.adjacent.markets/llms.txt
- Agent skills index: https://adjacent.markets/.well-known/agent-skills/index.json
- API catalog: https://adjacent.markets/.well-known/api-catalog
- Sitemap: https://adjacent.markets/sitemap.xml

## Senate (R) (senr)

> **Reading the value.** Probability-based Adjacent political indices publish on a **50–150 index scale**, not a 0–100 probability and not a dollar price. **100 is the neutral baseline** (the index party's aggregate win-probability across its tracked races is 50%). Each point above or below 100 is one percentage point of win-probability, so **value − 50 = implied win-probability %** (109 ≈ 59%, 95 ≈ 45%, 130 ≈ 80%). The scale runs 50 (0%) to 150 (100%), so an outcome is only "near-certain" as the value approaches 150 (or 50). **RED** tracks Republican strength and **BLUE** tracks Democratic strength; a value above 100 means that index's party is favored across its races.

- Latest value: **104.23** on the 50–150 scale (as of 2026-09-05)
- Daily history: /api/v1/public/indices/senater_kalshi/prices?interval=1day (89 points)
- Intraday series: /api/v1/public/indices/senater_kalshi/prices?interval={1min|5min|1hour|1day}
- Constituents: /api/v1/public/indices/senater_kalshi/constituents?expand=markets
- Auth: none, a public CORS-open snapshot tier.

### Expanded leaf-market constituents (67)

Constituent "Last price" is each market's Yes probability (0–100%), not the index's 50–150 value.

| Ticker | Weight | Last price |
|---|---:|---:|
| SENATETX-26-R | 5.39% | 52.00% |
| SENATEME-26-R | 3.53% | 32.00% |
| SENATEMI-26-R | 3.07% | 38.00% |
| SENATEOHS-26-R | 2.88% | 46.00% |
| SENATEIA-26-R | 2.61% | 65.00% |
| SENATEGA-26-R | 2.52% | 8.00% |
| SENATENC-26-R | 2.41% | 10.00% |
| SENATESC-26-R | 2.31% | 86.00% |
| SENATEAK-26-R | 2.29% | 35.00% |
| SENATENE-26-R | 2.20% | 71.00% |
| SENATEMN-26-R | 2.20% | 9.00% |
| SENATEMT-26-R | 2.16% | 91.00% |
| SENATENH-26-R | 2.15% | 19.00% |
| SENATEKS-26-R | 2.15% | 82.00% |
| SENATEFLS-26-R | 2.15% | 92.00% |
| SENATELA-26-R | 2.08% | 95.00% |
| SENATEID-26-R | 2.06% | 97.00% |
| SENATEMS-26-R | 2.06% | 94.00% |
| SENATENJ-26-R | 2.06% | 2.00% |
| SENATESD-26-R | 2.05% | 96.00% |
| SENATECO-26-R | 2.05% | 4.00% |
| SENATEWY-26-R | 2.05% | 99.00% |
| SENATEAR-26-R | 2.05% | 94.00% |
| KXSENATELA-26NOV-R | 2.05% | 94.00% |
| SENATEVA-26-R | 2.04% | 4.00% |
| SENATEWV-26-R | 2.04% | 99.00% |
| SENATEIL-26-R | 2.04% | 1.00% |
| SENATEOK-26-R | 2.04% | 96.00% |
| SENATEDE-26-R | 2.04% | 1.00% |
| SENATENM-26-R | 2.04% | 2.00% |
| SENATETN-26-R | 2.04% | 97.00% |
| SENATEMA-26-R | 2.04% | 1.00% |
| SENATEOR-26-R | 2.04% | 2.00% |
| SENATERI-26-R | 2.04% | 1.00% |
| SENATEAL-26-R | 2.04% | 98.00% |
| SENATENC-28-R | 0.60% | 42.00% |
| SENATEOH-28-R | 0.60% | 53.00% |
| SENATEAZ-28-R | 0.60% | 25.00% |
| SENATEVT-28-R | 0.60% | 4.00% |
| SENATESC-28-R | 0.60% | 84.00% |
| SENATEHI-28-R | 0.59% | 12.00% |
| SENATEFL-28-R | 0.59% | 82.00% |
| SENATEPA-28-R | 0.59% | 26.00% |
| SENATEID-28-R | 0.59% | 90.00% |
| SENATELA-28-R | 0.59% | 86.00% |
| SENATEIN-28-R | 0.59% | 58.00% |
| SENATEWA-28-R | 0.59% | 5.00% |
| SENATEUT-28-R | 0.59% | 93.00% |
| SENATEWI-28-R | 0.59% | 37.00% |
| SENATECA-28-R | 0.59% | 6.00% |
| SENATEAK-28-R | 0.59% | 71.00% |
| SENATEMO-28-R | 0.59% | 88.00% |
| SENATEAR-28-R | 0.59% | 88.00% |
| SENATENY-28-R | 0.59% | 4.00% |
| SENATENV-28-R | 0.59% | 42.00% |
| SENATENH-28-R | 0.59% | 12.00% |
| SENATEOR-28-R | 0.59% | 9.00% |
| SENATECT-28-R | 0.59% | 4.00% |
| SENATEGA-28-R | 0.59% | 34.00% |
| SENATEND-28-R | 0.59% | 82.00% |
| SENATEIA-28-R | 0.59% | 62.00% |
| SENATEMD-28-R | 0.59% | 5.00% |
| SENATESD-28-R | 0.59% | 96.00% |
| SENATEIL-28-R | 0.59% | 7.00% |
| SENATEKS-28-R | 0.59% | 76.00% |
| SENATEOK-28-R | 0.59% | 91.00% |
| SENATECO-28-R | 0.59% | 8.00% |

See skill: /.well-known/agent-skills/read-index/SKILL.md