Top 5 Team Defenses BTI (Kalshi)
Equal-weight NAV blend of the five best defensive ratings from last season, expressed as those teams' current-season BTI books.
This index uses methodology-defined points, not a win probability. The 50–150 probability reading does not apply. See the methodology overview for how the level is built. The Governance catalog holds the formal methodology and factsheet.
Key facts
- Ticker
- DEF5BTI.K
- Index id
- def5_bti
- Methodology
- bti
- Latest published level
- 997.2199 (as of 2026-10-13T18:30:00Z)
- Scale
- Methodology-defined points
- Calculating agent
- Adjacent
- Data access
- Public JSON API, no authentication, 15-minute delay
- API endpoint
- https://api.adjacent.markets/api/v1/public/indices/def5_bti
Index data last published: 2026-10-13.
Live data: public JSON API (15-minute delayed, no auth).
Frequently asked questions
- What is the Top 5 Team Defenses BTI (Kalshi) (DEF5BTI.K) index? Equal-weight NAV blend of the five best defensive ratings from last season, expressed as those teams' current-season BTI books. DEF5BTI.K is a rules-based index built from prediction-market event contracts and calculated by Adjacent, an independent index provider.
- How is DEF5BTI.K calculated? Each Adjacent index follows a published methodology that defines its eligible universe, constituent selection, and weighting. Values are recomputed on the indexer’s scheduled compute cycle. Adjacent’s public data is served from a snapshot tier delayed by 15 minutes.
- How do I access DEF5BTI.K data? DEF5BTI.K is available from the public JSON API at /api/v1/public/indices/def5_bti with no authentication required. Plans with higher rate limits, the MCP server, and embeddable widgets cover the same data.