Compare 2023 NCAA Men's Basketball Tournament - First Round prediction market odds side by side across Kalshi, Polymarket. Platforms show similar odds, with an average spread of just 0.0pp. Close agreement often signals strong market consensus. With $3.77M in combined trading volume across 12 outcomes, this is one of the most actively traded cross-platform prediction markets.
| Outcome |  Kalshi |  Polymarket | Spread |
|---|---|---|---|
I Illinois wins by over 1.5 Points | - | - | |
I Illinois wins by over 19.5 Points | 99%+74.0 |
| - |
| - |
I Illinois wins by over 10.5 Points | - | - |
I Illinois wins by over 16.5 Points | - | - |
I Illinois wins by over 7.5 Points | - | - |
I Illinois wins by over 4.5 Points | - | - |
I Illinois wins by over 13.5 Points | - | - |
I Illinois wins by over 25.5 Points | - | - |
I Illinois wins by over 22.5 Points | - | - |
V VCU wins by over 2.5 Points | - | - |
V VCU wins by over 5.5 Points | - | - |
 Yes | - | - |
