Part of event: Where will Tropical Storm Saudel make landfall? · where-will-tropical-storm-saudel-make-landfall-1787177922936
Market structure and 24h change as reported by Polymarket's public API.
Top of book
Best bid
0.951
Best ask
0.978
Spread
2.8% of mid
2.70 pts
As reported by Polymarket's public API at 16:07 UTC; top of book, not full depth; per-side depth not shown. The spread is shown against the midpoint of the two quotes above, which is arithmetic on the venue's figures, not a figure the venue reports.
Volume
24h volume
$23,667
Total volume
$26,458
Volume as reported by Polymarket's public API.
Resolution rules
Rules as stated by Polymarket, reproduced verbatim. Convexly has not independently reviewed them and does not endorse them; the rating's resolution-reliability pillar treats rule text as present but not independently reviewed.
Each market in this group asks whether Tropical Storm Saudel (JMA designation T2618) will make landfall in the country named in that market's title, on or before 11:59 PM ET on August 31, 2026. The qualifying crossing must occur on or before that deadline; confirmation may arrive afterward. Each market resolves "No" if no qualifying crossing of its country's territory has occurred by the deadline. A market resolves "Yes" if the center of Saudel's circulation physically crosses the coastline of that country, as plotted by the Japan Meteorological Agency's (JMA) position advisories placing the center over that country's land (https://www.jma.go.jp/bosai/map.html#contents=typhoon&lang=en), or as confirmed by credible international news reporting. JMA is the primary resolution source: if a JMA advisory plots the center over a country's land, that market resolves "Yes" regardless of what other sources say; if no JMA advisory plots the center on land but credible reporting confirms the center crossed the coastline between discrete advisory fixes, the market also resolves "Yes." A disagreement exists only when a JMA advisory and credible reporting make contradictory claims about the storm's position at the same point in time; in that case, JMA is the default resolution source. Territorial definitions: "China" refers to all territory under the administration of the People's Republic of China, including the Special Administrative Regions of Hong Kong and Macau, and excluding Taiwan. "Japan" refers to all territory under the administration of Japan, including the four main islands (Honshu, Hokkaido, Kyushu, and Shikoku), Okinawa, the Ryukyu Islands, the Ogasawara Islands, and all other Japanese islands. "South Korea" refers to all territory under the administration of the Republic of Korea, including Jeju Island and all outlying islands. The most recently issued JMA advisory prior to the crossing must classify Saudel as a tropical cyclone (tropical depression or higher); a crossing while the system is extratropical, dissipated, or absorbed does not count. For every market, the classification and position determination in effect immediately prior to the qualifying crossing are fixed by that single JMA advisory and are not changed by any later real-time advisory, reclassification, or post-season best-track reanalysis.Show the full rules textHide the full rules text
Each market in this group asks whether Tropical Storm Saudel (JMA designation T2618) will make landfall in the country named in that market's title, on or before 11:59 PM ET on August 31, 2026. The qualifying crossing must occur on or before that deadline; confirmation may arrive afterward. Each market resolves "No" if no qualifying crossing of its country's territory has occurred by the deadline. A market resolves "Yes" if the center of Saudel's circulation physically crosses the coastline of that country, as plotted by the Japan Meteorological Agency's (JMA) position advisories placing the center over that country's land (https://www.jma.go.jp/bosai/map.html#contents=typhoon&lang=en), or as confirmed by credible international news reporting. JMA is the primary resolution source: if a JMA advisory plots the center over a country's land, that market resolves "Yes" regardless of what other sources say; if no JMA advisory plots the center on land but credible reporting confirms the center crossed the coastline between discrete advisory fixes, the market also resolves "Yes." A disagreement exists only when a JMA advisory and credible reporting make contradictory claims about the storm's position at the same point in time; in that case, JMA is the default resolution source. Territorial definitions: "China" refers to all territory under the administration of the People's Republic of China, including the Special Administrative Regions of Hong Kong and Macau, and excluding Taiwan. "Japan" refers to all territory under the administration of Japan, including the four main islands (Honshu, Hokkaido, Kyushu, and Shikoku), Okinawa, the Ryukyu Islands, the Ogasawara Islands, and all other Japanese islands. "South Korea" refers to all territory under the administration of the Republic of Korea, including Jeju Island and all outlying islands. The most recently issued JMA advisory prior to the crossing must classify Saudel as a tropical cyclone (tropical depression or higher); a crossing while the system is extratropical, dissipated, or absorbed does not count. For every market, the classification and position determination in effect immediately prior to the qualifying crossing are fixed by that single JMA advisory and are not changed by any later real-time advisory, reclassification, or post-season best-track reanalysis.
Resolution mechanics
Resolution parameters as stated by Polymarket.
- Resolved by (UMA adapter)
- 0x65070BE91477460D8A7AeEb94ef92fe056C2f2A7
- Proposer bond
- $500 proposer bond
- Proposer reward
- $5 proposer reward
- Stated resolution source
- https://www.jma.go.jp/bosai/map.html#contents=typhoon&lang=en
Market Trust diagnostic · v0.2 candidate
Will Tropical Storm Saudel make landfall in Japan?
This market is not in the v0.1 daily card set yet. The v0.2 diagnostic scorecard below shows the per-pillar contribution from the latest materializer run, with visible caveats and evidence-status separation.
Why this rating
Why this rating
Composite 53 · Do not cite
Measurement certainty
Low
1 measured · 3 modeled · 2 not assessed
Certainty reflects how much of this market we measured, not how good the market is.
- CoherenceModeled estimatefixed rules, not a per-market measurementweight 25.0
No full-provenance CME signal is linked to this condition in the current ledger window; absence of a signal is not proof of coherence.
- · no linked cme signal in window
- · absence of signal not proof of coherence
- · cme signal window days: 7
- · recent full provenance signals: 21
50+17.9 - ExecutabilityModeled estimatefixed rules, not a per-market measurementweight 20.0
Executability scored as worse-of(spread, depth) from a single orderbook snapshot; the two were merged from the former liquidity + depth pillars to stop double-counting one correlated source.
- · executability worse of spread depth
- · spread: top-of-book spread 11.0c
- · spread: pp-band-to-cents-band approximation in effect (depth_5pct_usd/2 per side); per-side decomposition pending substrate work
- · spread: scorer_version:M2
15+4.3 - Resolution reliabilityModeled estimatefixed rules, not a per-market measurementweight 20.0
Resolution source and rule text are present but not independently reviewed.
- · resolution metadata present manual review pending
70+20.0 - Participant flowNot assessednot yet measured for this marketweight 20.0
Participant flow inputs exist but do not meet identity-coverage floors; descriptive only.
- · below publishable sample floor
- · high participant concentration
- · high unknown flow share
- · insufficient scored accounts
not assessednot assessed - Integrity-risk screenNot assessednot yet measured for this marketweight 10.0
One or more screen indicators flagged at a low level. A reason to look, not a finding about anyone.
- · top-3 wallets control 100% of notional flow
- · flow events: 2
- · distinct wallets: 2
- · wash round trips: 0
75not assessed - Audit completenessMeasuredweight 5.0
3 linked artifacts; 0 missing hashes; 0 stale/failing sources.
- · artifact hashes present
- · source watermarks healthy
100+7.1
How it adds up: composite = Σ(score × weight) / Σ(weight) across measured + heuristic pillars only. Pending and data-rights-blocked pillars are excluded from both numerator and denominator. Total contributing weight = 70.0.
Caveat: 2 pillars not assessed yet; the score will recompute as the substrate fills in.
Structural coherence read
The Coherent Markets Engine checks this market's pricing for structural inconsistencies against related markets. Whether a current signal exists, and its construction, is included with Researcher.
See ResearcherMarket opened 2026-08-20 · minimum order size 5 shares · price tick size 0.001 · as stated by Polymarket.