Koike vs Day Odds · Koike vs Day (Oct 16)
This market has resolved: Kayla Day. Final prices are below.
| Outcome | Chance | Odds | 24h |
|---|---|---|---|
| Kayla Day ✓ | 99% | -9900 | — |
| Ena Koike | 1% | +9900 | — |
Price history
Resolution rules
If Ena Koike wins the Koike vs Day professional tennis match in the 2026 WTA Osaka Qualification Round 1 after a ball has been played, then the market resolves to Yes.
Source: Kalshi. The venue's rules are final.
FAQ
How are prediction market odds calculated?
Each contract pays $1 if the outcome happens and $0 if it doesn't, so its price is the market's implied probability: a 60¢ contract means roughly a 60% chance. We show the last trade, or the midpoint between the best bid and ask when the order book is tight.
When does this market close?
Kalshi lists Oct 17, 2026 as the end date; this market has closed.
Where can I trade on Koike vs Day?
This market trades on Kalshi. Availability depends on where you live: Kalshi is a CFTC-regulated US exchange, while Polymarket's international site isn't available to US users (Polymarket US is a separate app). You must be 18 or older.