Settles YES when
Resolves YES if the 60-second simple average of CF Benchmarks' BRTI ending just before the settlement time is greater than or equal to the 60-second simple average of CF Benchmarks' BRTI ending just before 15 minutes earlier, on the contract's settlement date.
4 resolution traps in the KXBTC15M rules
The wording that changes how or when the contract settles β which data source and which print, the exact metric, rounding, date boundaries, void conditions.
15-Minute BTCResolves YES if the 60-second simple average of CF Benchmarks' BRTI ending just before the settlement time is greater than or equal to the 60-second simple average of CF Benchmarks' BRTI ending just before 15 minutes earlier, on the contract's settlement date.4 traps
- BRTI 60-second average, not spot price β Resolution uses the simple average of exactly sixty individual BRTI seconds, not any instantaneous or candlestick price, so a momentary spike or dip at the window boundary is irrelevant.
- Inclusive comparison: equal resolves YES β The rule says 'at least,' so if both 60-second averages are identical the contract resolves YES, not NO β a tie favours the long side.
- 15-minute cadence: two specific 60-second windows matter β Each contract in this series compares the window just before one timestamp to the window just before a timestamp 15 minutes earlier; traders must confirm exactly which pair of timestamps applies to their contract, as every 15-minute interval spawns a separate contract.
- CF Benchmarks BRTI is the sole source β Any discrepancy between BRTI and other BTC indices (e.g. CME CF BRR, exchange spot prices) is irrelevant β only CF Benchmarks' real-time index governs resolution.
KXBTC15M contracts open now
A contract price in cents is already a probability β 42c is a 42% implied chance. Prices from Kalshi, refreshed periodically; check the exchange before taking a position.
Tickers and fields
- series_ticker
- KXBTC15M
- event_ticker
- KXBTC15M-26NOV100230
- ticker
- KXBTC15M-26NOV100230-30
- settles on
- the simple average of the 60 one-second CF Benchmarks index values immediately before the cut-off β the way Kalshi states it in the contract, not a single spot print
- rules_primary
- If the simple average of the sixty seconds of CF Benchmarks' BRTI before 2:30 AM EST on Nov 10, 2026 is at least the simple average of the sixty seconds of CF Benchmarks' BRTI before 2:15 AM EST on November 10, 2026, then the market resolves to Yes.
Open windows: GET /trade-api/v2/markets?series_ticker=KXBTC15M&status=open. Event tickers end in the Eastern close time. Our live board for this series is a free JSON feed: the feed and a read-only snippet β
How close our price feed is to Kalshi's settlement print
Kalshi settles KXBTC15M on the simple average of the 60 one-second CF Benchmarks index values immediately before the cut-off β the way Kalshi states it in the contract, not a single spot print, and publishes the exact figure it used. We record our own independent read at that instant and score it against theirs. Rounded to 2 decimals, the precision this series settles at.
Every miss, listed
- large 2026-11-10 07:15Z Β· off by 0.11
- large 2026-11-10 07:00Z Β· off by 0.32
- large 2026-11-10 06:45Z Β· off by 0.05
- large 2026-11-10 06:30Z Β· off by 0.09
- large 2026-11-10 06:15Z Β· off by 0.08
- large 2026-11-10 06:00Z Β· off by 0.12
- large 2026-11-10 05:45Z Β· off by 0.1
- large 2026-11-10 05:30Z Β· off by 0.05
- large 2026-11-10 05:15Z Β· off by 0.12
- large 2026-11-10 05:00Z Β· off by 0.05
This is a measured approximation, not the settlement feed itself. If a contract is decided by the last tick at the final decimal place, do not size it off this. Trade responsibly.
Our record on KXBTC15M
Go deeper
How Kalshi settles 15-Minute BTC β frequently asked
How does Kalshi settle 15-Minute BTC markets?
Resolves YES if the 60-second simple average of CF Benchmarks' BRTI ending just before the settlement time is greater than or equal to the 60-second simple average of CF Benchmarks' BRTI ending just before 15 minutes earlier, on the contract's settlement date. That criterion is the whole contract β the headline question is a summary of it, not the rule itself.
What can go wrong when a 15-Minute BTC contract resolves?
We flag 4 traps in these rules. The first: BRTI 60-second average, not spot price β Resolution uses the simple average of exactly sixty individual BRTI seconds, not any instantaneous or candlestick price, so a momentary spike or dip at the window boundary is irrelevant.
What does the KXBTC15M ticker mean?
KXBTC15M is Kalshi's series ticker for 15-Minute BTC. Individual contracts append the event and the strike β so one series carries many contracts, all settling under the same rule. This page covers the rule; the board above lists the contracts open right now.
Do you have a record trading 15-Minute BTC?
Not yet. We track KXBTC15M settlement rules, but no position on this series has been graded, so there is no record to show. We would rather say that than show a zeroed scorecard.
How accurate is your price feed against Kalshi's KXBTC15M settlement?
Across 5738 settled instants measured so far, our independent read reproduced Kalshi's published settlement print to within one tick 559 times β mean absolute error 0.2016, worst 5.69. Kalshi settles on the simple average of the 60 one-second CF Benchmarks index values immediately before the cut-off β the way Kalshi states it in the contract, not a single spot print, and publishes the exact number it used, so this is measured against their own print, not an estimate. We started recording on 2026-09-09 and nothing before that can be reconstructed, so the sample is small and stated rather than rounded up.
This is our reading of Kalshiβs published resolution rules, not a substitute for them β read the contract before taking a position. Prediction markets carry risk; contracts can settle at $0. Informational only, not financial advice.