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kalshi historical data / sports / KXMLBNLROTY
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Pro Baseball National League Rookie of the Year, tick by tick.
Kalshi series KXMLBNLROTY: order book and trades, 2026-09-27 → 2026-10-23.

The order-book and trade history of Kalshi's Pro Baseball National League Rookie of the Year series (a new event every year): top of book on every change, the 25-level book on every change in YES terms, every trade with the taker's side, and Kalshi's own ticker, with exchange timestamps to the millisecond. Captured by us from Kalshi's websocket on two independent legs and checked against the exchange's own book snapshots.

27 days2026-09-27 → 2026-10-23 · every day since its first · ~2 MB per day · 64 MB on disk · 30 open markets
pull KXMLBNLROTY days →schemapricing

What a KXMLBNLROTY day contains

Four parquet files per day, every market of the series in each. Sizes are this series' own averages over its 27 days on disk.

Top of book (every change)kalshi_l1

Best YES bid and ask with sizes and the spread, one row whenever either changed, derived tick by tick from the rebuilt book: not Kalshi's conflated ticker.

~158 kB per KXMLBNLROTY day
Order book, 25 levels, every changekalshi_l2

The whole ladder after every book event, in YES terms (the NO bids become the asks, at their sizes), 25 levels a side: wide columns bid_px_1 … ask_sz_25, plus the exchange's own hourly snapshots. Each row is self-contained, so you can start reading mid-day.

~2 MB per KXMLBNLROTY day
Tradeskalshi_trades

Every trade: YES and NO price, size in contracts, the taker's side, block-trade flag, trade id.

~39 kB per KXMLBNLROTY day
Kalshi ticker (~1 s)kalshi_ticker

Kalshi's own ticker feed, about one update a second per market: last price, YES bid/ask with sizes, cumulative volume and open interest in contracts and dollars.

~122 kB per KXMLBNLROTY day

KXMLBNLROTY markets

The 12 closing nearest to now, from Kalshi's daily market list. Each is a row key (market_ticker) in every table, captured from the day it opens until it settles.

Will Alex Freeland win NL ROTY?: Alex FreelandKXMLBNLROTY-26-AFREcloses 2026-12-08 15:00 UTC
Will Aidan Miller win NL ROTY?: Aidan MillerKXMLBNLROTY-26-AMILcloses 2026-12-08 15:00 UTC
Will Andrew Painter win NL ROTY?: Andrew PainterKXMLBNLROTY-26-APAIcloses 2026-12-08 15:00 UTC
Will Bubba Chandler win NL ROTY?: Bubba ChandlerKXMLBNLROTY-26-BCHAcloses 2026-12-08 15:00 UTC
Will Bryce Eldridge win NL ROTY?: Bryce EldridgeKXMLBNLROTY-26-BELDcloses 2026-12-08 15:00 UTC
Will Carson Benge win NL ROTY?: Carson BengeKXMLBNLROTY-26-CBENcloses 2026-12-08 15:00 UTC
Will Charlie Condon win NL ROTY?: Charlie CondonKXMLBNLROTY-26-CCONcloses 2026-12-08 15:00 UTC
Will Chase Petty win NL ROTY?: Chase PettyKXMLBNLROTY-26-CPETcloses 2026-12-08 15:00 UTC
Will Hunter Barco win NL ROTY?: Hunter BarcoKXMLBNLROTY-26-HBARcloses 2026-12-08 15:00 UTC
Will Justin Crawford win NL ROTY?: Justin CrawfordKXMLBNLROTY-26-JCRAcloses 2026-12-08 15:00 UTC
Will Jhostnyxon Garcia win NL ROTY?: Jhostnyxon GarciaKXMLBNLROTY-26-JGARcloses 2026-12-08 15:00 UTC
Will Joe Mack win NL ROTY?: Joe MackKXMLBNLROTY-26-JMACcloses 2026-12-08 15:00 UTC

Coverage notes for KXMLBNLROTY

  • First day on disk: 2026-09-27. That is the day our Kalshi capture began, not the series' launch. New days are added daily.
  • Trades before 2026-09-27. Kalshi's historical API has no tick-level order book, so earlier KXMLBNLROTY trades are in the whole-exchange trades history (from 2021-06-30, one file a day): filter market_ticker to this series' markets, which start with KXMLBNLROTY-.
  • The first day starts at 11:00 UTC. Our capture began at 11:00 UTC on 27 September 2026: 13 hours that day, not 24, and no CF Benchmarks index file (that capture starts on the 28th).
  • A book-quality dip on 2026-09-29. During a pipeline cutover 10,255 exchange snapshots disagreed with the rebuilt book (41 to 1,378 on every other day) and 16,678 negative levels were clamped to zero. The book resynchronises at every exchange snapshot; trades and ticker are unaffected.
  • Every bundle ships a README with the schemas and, per day, how often the rebuilt book matched the exchange's own snapshots, for your exact range.

Pricing

A month of KXMLBNLROTY, every table, is about 71 MB. Bought for Kalshi, Starter ($29/mo) carries top of book, trades and the ticker for every series plus one series of your choice, KXMLBNLROTY if you like, at full book depth; L10 ($49/mo) carries every series' book at 10 levels and L25 ($99/mo) the full 25-level book. Each includes 7 days before you join and every day after. Any free account can pull 2026-10-07, any series, up to 1.0 GB.

Starter: KXMLBNLROTY at full depth →L10: every series at 10 levelsL25: every series, 25 levelsfree sample day

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