CPI above 0.5% in September sits at a coin-flip

Name: CPI above 0.5% in September sits at a coin-flip
Creator: ClearMarket
Published: 2026-10-07T15:02:49+00:00
License: https://creativecommons.org/licenses/by/4.0/

49% · $71K 24h

record: CMSIG20261007VS00 | category: volume-spike | target: CM-EVT-F9NPW9F1V9 | published: 2026-10-07

4-bullet brief | narrative

Kalshi prices the September CPI overshoot at 49%, effectively dead even, implying no consensus on a hot print.
24h volume of $71K is 44% of all-time handle, marking this as the sharpest single-day interest the contract has seen.
September CPI data is imminent, drawing traders to stake out positions before the release resolves the contract.
Resolves on official BLS September 2026 CPI print; a >0.5% month-over-month rise needed for YES.

atomic briefs | structured for retrieval

[01] volume_anomaly

liquidity kalshi_vol_24h: $71.2K

evaluation

The model, prompt version, and confidence behind this wire are published below — so you can see how it was judged, and re-check it yourself.

judge_engine: llm_judge_cm_signal_v1
judge_verdict: wire_eligible
judge_confidence: 0.81 / 1.00
prompt_template: volume_spike_v1 github · auditable

citation graph

Every wire traces back to the ClearMarket event it is built on, and out to each venue’s own market page — so any figure here can be verified at its source.

internal

cm_event: /events/kxcpi-26sep/

external

venue_a: https://kalshi.com/markets/KXCPI-26SEP-T0.5

programmatic access · four surfaces, same payload

AI grounded search reads embedded JSON-LD in HTML. Developers query REST. Agentic AI clients (Claude Desktop, Cursor) call MCP tools. AI crawlers index via /llms.txt. Same canonical record at every surface.

HTML	browsers, AI grounded search, crawlers (contains embedded JSON-LD `@type: Dataset`)	`https://clearmarket.fyi/signals/will-cpi-rise-more-than-0-5-in-septembe-vol-71198/`
JSON	REST API for developers	`https://clearmarket.fyi/signals/will-cpi-rise-more-than-0-5-in-septembe-vol-71198.json`
MCP	agentic AI tool call (Claude Desktop, Cursor, Continue)	`clearmarket.get_signal("will-cpi-rise-more-than-0-5-in-septembe-vol-71198")`
AGENT	AI crawler discovery index	`/llms.txt`

 PM data: platform APIs (hourly refresh). News context: retrieved with source citations. Editorial judgment: LLM judge with prompt template versioned per wire type. Per-claim provenance inline above; full per-field provenance map at the JSON endpoint under field_provenance.
  raw JSON record · same payload returned by REST endpoint
 {
  "$schema": "https://clearmarket.fyi/schema/signal/v1.json",
  "provenance_version": "0.2.0",
  "record_id": "CMSIG20261007VS00",
  "published_at": "2026-10-07T15:02:49+00:00",
  "detection": "volume_spike",
  "category_tag": "VOLUME_SPIKE",
  "secondary_tags": [],
  "pre_news_classification": "pre_news",
  "target_event_id": "CM-EVT-F9NPW9F1V9",
  "target_event_slug": "kxcpi-26sep",
  "event_question": "Will CPI in September be above expectations?",
  "bullets": [
    "Kalshi prices the September CPI overshoot at 49%, effectively dead even, implying no consensus on a hot print.",
    "24h volume of $71K is 44% of all-time handle, marking this as the sharpest single-day interest the contract has seen.",
    "September CPI data is imminent, drawing traders to stake out positions before the release resolves the contract.",
    "Resolves on official BLS September 2026 CPI print; a >0.5% month-over-month rise needed for YES."
  ],
  "atomic_claims": [
    {
      "type": "volume_anomaly",
      "provenance": "24h + cumulative volume direct from kalshi API; intensity = 24h/cumulative (derived)",
      "field_provenance": {
        "volume_24h_usd": {
          "tier": "direct",
          "method": "kalshi_api"
        },
        "intensity": {
          "tier": "derived",
          "method": "arithmetic",
          "inputs": [
            "volume_24h_usd",
            "volume_cumulative_usd"
          ]
        }
      },
      "liquidity_context": {
        "kalshi_vol_24h_usd": 71198.97
      }
    }
  ],
  "evaluation": {
    "judge_engine": "llm_judge_cm_signal_v1",
    "judge_verdict": "wire_eligible",
    "judge_confidence": 0.81,
    "prompt_template": "volume_spike_v1"
  },
  "citations": {
    "internal": {
      "cm_event": "/events/kxcpi-26sep/",
      "related": []
    },
    "external": {
      "venue_a": "https://kalshi.com/markets/KXCPI-26SEP-T0.5",
      "venue_b": null,
      "benchmark": null
    }
  },
  "sources": [
    {
      "label": "ClearMarket market record: Will CPI in September be above expectations?",
      "url": "https://clearmarket.fyi/events/kxcpi-26sep",
      "retrieved_at": "2026-10-07T15:02:49+00:00"
    }
  ],
  "field_provenance": {
    "pm_data": "kalshi_api",
    "news_context": "retrieval_grounded",
    "editorial_judgment": "cm_signal_llm_judge"
  }
}
 
   PROVENANCE PROTOCOL v0.2 · [direct] venue api · [mediated] grounded web fetch + source url · [derived] computed from listed inputs · [editorial] versioned llm judgment · full spec /schema/provenance/v1

record CMSIG20261007VS00 published 2026-10-07T15:02:49+00:00 signature sha256-d93d94a8b4b… ← underlying event all signals →