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10 posts tagged “research”.

kalshi volume market-microstructure

Reading Kalshi's Sports Volume: Notional vs. Cash

ZenHodl: $3.12B headline notional vs $1.48B taker cash across 15,808,966 Kalshi sports prints we captured (May 15 - Sep 6, 2026).

kalshi polymarket market-microstructure

Kalshi Bid-Ask Spreads by Trade Size (and How Polymarket Compares)

See how Kalshi's quoted spread changes with the liquidity behind the quote, across 553,843 order-book snapshots — and why depth beats spread.

polymarket parlays leaderboard

Is the Parlay Leaderboard Skill or Luck? We Pre-Registered the Test

Profit leaderboards show ex-post winners. We hold the complete decoded tape of Polymarket's invisible parlay market — every loser included — so we...

polymarket kalshi parlays

We Decoded Polymarket's Invisible Parlay Market

Polymarket combos have no public listings, no order book, and no trade feed. We reconstructed the entire market from on-chain data — ~$9.5M of parlay...

research prediction-markets polymarket

The State of Prediction Markets in 2026: Data, Liquidity, and What Actually Works

A dated research snapshot on prediction-market liquidity, calibration, and execution across Polymarket and Kalshi — with current evidence caveats.

polymarket kalshi market-microstructure

Polymarket Leads Kalshi by ~30 Seconds: A Lead-Lag Study on Time-Aligned MLB Order Books

We time-aligned sampled Kalshi and Polymarket books on the same MLB games for 16 days. Polymarket led on all 16 and divergences half-closed in ~34...

polymarket backtesting historical-data

Backtesting Polymarket Strategies: Tools, Datasets, and the Depth Data Problem

Compare Polymarket price history, recorded book quotes and L2 depth for backtests. Check clocks, costs and capture gaps before choosing a dataset.

research market-efficiency polymarket

What Our Live Results Say About Market Efficiency in Sports Prediction Markets

A year of live trading data on Polymarket — what it reveals about sports prediction market efficiency, where systematic mispricing persists, and where the...

comparison calibration nba

Why We Can't Retroactively Benchmark NBA First Round 2026 — And Why That's The Point

Why the pre-committed NBA Playoffs benchmark starts at the Conference Semis: adding First Round after tip-off would un-freeze a frozen test.

calibration results research

We Audited 21 Sports Prediction Sources. Only 1 Publishes Their Calibration Error.

We surveyed 21 sports prediction providers — KenPom, BetQL, Sportradar, FiveThirtyEight, MoneyPuck, OddsJam, and 15 others — for the one number a...