Kalshi adds Brier scores, low-volume tags and real-time activity feeds to its 2026 midterm markets

Kalshi is adding forecast-accuracy scores, low-volume labels and live activity feeds to its 2026 midterm election markets, according to predictionauthority.com. The features provide different ways to assess forecasts and the trading behind election contracts.

Three layers of transparency

Brier scores are the accuracy component of the update. According to predictionauthority.com, they score forecast performance, adding an evaluation measure alongside the markets themselves.

Low-volume tags flag thinly traded contracts. That distinguishes the question of forecast accuracy from the amount of trading activity in a particular market.

Real-time activity feeds provide a live view of market activity. Together, the additions address accuracy, trading volume and activity visibility rather than a single measure of market quality.

Details remain limited

The report concerns midterm markets where 2026 trading is already underway. The available summary does not provide a trading-volume figure, implementation details or thresholds for the low-volume labels; the full source text was unavailable.

What it means for prediction markets

• Accuracy: Brier scores add a forecast-performance measure, although the available material does not explain how Kalshi applies or displays it.
• Thin contracts: Low-volume labels give readers an explicit signal to distinguish lightly traded markets when interpreting election prices.
• Activity visibility: Live feeds offer another way to follow trading, separate from the forecast-accuracy scores and volume flags.