Kalshi Longest Winning Streak Historical Data
Every Kalshi “Longest Winning Streak” contract of the day — every trade print and the complete Level-2 book, captured co-located with nanosecond venue and receive timestamps. 209 trading days as day bundles, €1 per day, bought as a guest with instant download.
Longest Winning Streak on Kalshi — activity
Per-day trade and turnover statistics exist from July 2026 onward — a limit of the statistics, not of the capture: older days are archived in full (every contract, every message) without a statistics row.
One purchase, the whole series for a day
A series-day bundle contains every Longest Winning Streak contract that was listed on Kalshi on that UTC day — traded or not — 30 contract files on the latest covered day. Each file carries the full raw feed: every trade print with price, size and side, plus Level-2 order-book updates, in the same zstd-compressed schema as our crypto venues. Event contracts quote 0..1; turnover is USD-normalized.
Coverage runs March 2026 – present — 209 trading days, 244 MB compressed in total. A day typically holds 30 contract files (up to 30 on the busiest day, 18.0 MB). Pick individual days in the shop calendar for €1 each; delivery is an instant per-file download or one archive for the whole day.
Longest Winning Streak — development since capture
262 trades and $7.9K of USD turnover over 51 captured days since 2026-08-09 — record day 2026-09-11 with $1.2K, biggest single contract KXMLBWSTREAK-26-BOS (MLBWSTREAK · BOS) (2026-09-11, $1.2K).
| Month | Days | Trades | Turnover (USD) | Avg / day | Contracts traded | L2 updates | vs previous month |
|---|---|---|---|---|---|---|---|
| Sep 2026 | 28 | 163 | $6.8K | $241.61 | 51 | 2.5M | +501.1 % |
| Aug 2026 | 23 | 99 | $1.1K | $48.94 | 45 | 3.0M | — |
Kalshi Longest Winning Streak — trades and USD turnover summed per calendar month (UTC) over every contract, from our own daily statistics of the recorded tick data. Days = captured UTC days; a partial month shows no month-over-month change. Contracts traded and L2 (order-book) updates exist for days captured with the extended statistics.
MLB markets on other prediction venues
Polymarket, predict.fun, OG.com also list MLB event markets — the same 30-day statistics side by side, each a day bundle of its own.
| Venue · series | Trades (30d) | Turnover (30d) | Avg spread | Top-1 depth | L2 updates / trade | Days archived | Price / day |
|---|---|---|---|---|---|---|---|
| Kalshi · Longest Winning Streak (this page) | — | — | — | — | — | 209 | €1 |
| Polymarket · MLB (games & props) | 94,434 | $22.7M | 2.15 ¢ | $60.6K | 745.0 | 414 | €1 |
| predict.fun · MLB (games & props) | 7,740 | $699.9K | 1.44 ¢ | $33.3K | 223.1 | 21 | €1 |
| OG.com · MLB (games & props) | 146,368 | $8.6M | 2.09 ¢ | $57.9K | 282.3 | 24 | €1 |
30-day window of the statistics table, per venue's own series; spread in contract-price cents and best-bid/ask depth are turnover-weighted, L2 updates per trade = recorded order-book level updates ÷ trades. "—" = no statistics row in the window. Each venue settles its own contracts on its own rules — the series are comparable in subject, not interchangeable.
Longest Winning Streak — last 30 days in the archive
Files, size, contracts traded, trades, USD turnover, buy share, quoted spread, top-of-book depth and order-book updates per UTC day, from the recorded tick data.
| UTC day | Files | Size | Traded | Trades | Turnover | Buy share | Avg spread | Top-1 depth | L2 updates | Notes | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-28 | 30 | 40.1 KB | 0 | 0 | $0 | — | — | — | 423 | Buy day → | |
| 2026-09-27 | 30 | 310 KB | 0 | 0 | $0 | — | — | — | 8.9K | Buy day → | |
| 2026-09-26 | 30 | 341 KB | 2 | 2 | $1.2K | 0 % | — | — | 9.1K | Buy day → | |
| 2026-09-25 | 30 | 351 KB | 2 | 4 | $9.55 | 100 % | — | — | 9.5K | Buy day → | |
| 2026-09-24 | 30 | 297 KB | 1 | 2 | $9.35 | 100 % | — | — | 8.3K | Buy day → | |
| 2026-09-23 | 30 | 423 KB | 6 | 51 | $329.26 | 0 % | 26.1 ¢ | $15.05 | 13.0K | Buy day → | |
| 2026-09-22 | 30 | 451 KB | 9 | 14 | $122.56 | 22 % | — | — | 14.3K | Buy day → | |
| 2026-09-21 | 30 | 374 KB | 1 | 1 | $1.66 | 100 % | — | — | 10.6K | Buy day → | |
| 2026-09-20 | 30 | 353 KB | 0 | 0 | $0 | — | — | — | 10.8K | Buy day → | |
| 2026-09-19 | 30 | 427 KB | 1 | 2 | $953.06 | 100 % | 6.08 ¢ | $2.2K | 11.8K | Buy day → | |
| 2026-09-18 | 30 | 450 KB | 0 | 0 | $0 | — | — | — | 10.3K | Buy day → | |
| 2026-09-17 | 30 | 554 KB | 1 | 1 | $0.01 | 0 % | 15.6 ¢ | $7.62 | 13.7K | Buy day → | |
| 2026-09-16 | 30 | 3.89 MB | 1 | 1 | $0.02 | 100 % | 18.7 ¢ | $39.64 | 146.8K | Buy day → | |
| 2026-09-15 | 30 | 1.65 MB | 2 | 3 | $6.34 | 100 % | 2.78 ¢ | $67.68 | 61.5K | Buy day → | |
| 2026-09-14 | 30 | 651 KB | 2 | 8 | $674.74 | 100 % | 2.37 ¢ | $74.34 | 21.2K | Buy day → | |
| 2026-09-13 | 30 | 392 KB | 1 | 1 | $0.88 | 0 % | 4.14 ¢ | $42.74 | 10.6K | Buy day → | |
| 2026-09-12 | 30 | 2.89 MB | 2 | 7 | $927.84 | 100 % | 4.45 ¢ | $88.27 | 66.4K | Buy day → | |
| 2026-09-11 | 30 | 3.16 MB | 1 | 26 | $1.2K | 100 % | 5.14 ¢ | $119.78 | 93.7K | Buy day → | |
| 2026-09-10 | 30 | 3.44 MB | 4 | 11 | $555.12 | 99 % | 7.45 ¢ | $91.22 | 130.1K | Buy day → | |
| 2026-09-09 | 30 | 1.62 MB | 1 | 5 | $446.14 | 78 % | 2.86 ¢ | $142.11 | 56.4K | Buy day → | |
| 2026-09-08 | 30 | 2.76 MB | 2 | 3 | $124.92 | 98 % | 2.43 ¢ | $127.69 | 102.4K | Buy day → | |
| 2026-09-07 | 30 | 18.0 MB | 2 | 4 | $4.13 | 94 % | 2.87 ¢ | $9.11 | 668.2K | Buy day → | |
| 2026-09-06 | 30 | 14.7 MB | 1 | 4 | $147.46 | 100 % | 4.74 ¢ | $317.35 | 574.6K | Buy day → | |
| 2026-09-05 | 30 | 1.94 MB | 1 | 1 | $0.97 | 100 % | 4.28 ¢ | $192.44 | 71.3K | Buy day → | |
| 2026-09-04 | 30 | 3.31 MB | 2 | 2 | $1.21 | 100 % | 3.70 ¢ | $138.42 | 122.9K | Buy day → | |
| 2026-09-03 | 30 | 1.74 MB | 4 | 8 | $15.2 | 100 % | 3.91 ¢ | $148.77 | 63.4K | Buy day → | |
| 2026-09-02 | 30 | 2.28 MB | 1 | 1 | $0.94 | 0 % | 3.91 ¢ | $4.52 | 84.4K | Buy day → | |
| 2026-09-01 | 30 | 2.85 MB | 1 | 1 | $0.96 | 100 % | 3.87 ¢ | $154.93 | 107.1K | Buy day → | |
| 2026-08-31 | 30 | 1.09 MB | 2 | 5 | $110.86 | 1 % | 1.77 ¢ | $105.09 | 37.2K | Buy day → | |
| 2026-08-30 | 30 | 3.03 MB | 3 | 5 | $4.97 | 60 % | 1.69 ¢ | $41.92 | 113.2K | Buy day → |
Traded = contracts with at least one trade that day. Buy share = taker-buy side of USD turnover. Avg spread = quoted bid-ask spread in contract price cents (0..1 = 100 ¢), weighted by turnover across the day’s contracts. Top-1 depth = mean of the best bid and best ask notional in USD, weighted by turnover. L2 updates = order-book level updates recorded across all contracts of the day. Days captured before the extended statistics show —.
Most traded Longest Winning Streak contracts by day
The ten contracts with the most USD turnover per UTC day — open, high, low, close, VWAP and the outcome implied by the last print; the six previous days fold out below.
The 2 most traded Longest Winning Streak contracts on 2026-09-26 — 1 closed Yes (≥ 0.97), 1 closed No (≤ 0.03): 2 trades, $1.2K USD turnover. The busiest contract was KXMLBWSTREAK-26-BOS with $1.2K turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBWSTREAK-26-BOS MLBWSTREAK · BOS | 2026-09-28 00:41 | 0.990 | 0.990 | 0.990 | 0.990 | 0.990 | Yes | 1 | $1.2K | 0 % | — | — | 5.8K | buy file → |
| KXMLBWSTREAK-26-CLE MLBWSTREAK · CLE | 2026-09-28 00:41 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | No | 1 | $0.12 | 100 % | — | — | 2.1K | buy file → |
Prices quote 0..1 (probability of Yes). Open/high/low/close/VWAP are that UTC day’s trade prints per contract; the implied outcome reads the last print — ≥ 0.97 as Yes, ≤ 0.03 as No, anything between as still open — venues publish the official result. Buy share = taker-buy side of turnover; spread = the contract's turnover-weighted quoted bid-ask spread in cents, top-1 depth = mean best-bid/ask notional per side, L2 updates = order-book level updates recorded for the contract that day. “Settles” is the venue-listed close time of the contract where the venue publishes one (UTC).
2026-09-25 — 2 contracts, 4 trades, $9.55 turnover
The 2 most traded Longest Winning Streak contracts on 2026-09-25 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 2 still open at the last print: 4 trades, $9.55 USD turnover. The busiest contract was KXMLBWSTREAK-26-HOU with $9.3 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBWSTREAK-26-HOU MLBWSTREAK · HOU | 2026-09-28 00:41 | 0.010 | 0.300 | 0.010 | 0.300 | 0.265 | open | 3 | $9.3 | 100 % | — | — | 211 | buy file → |
| KXMLBWSTREAK-26-KC MLBWSTREAK · KC | 2026-09-28 00:41 | 0.250 | 0.250 | 0.250 | 0.250 | 0.250 | open | 1 | $0.25 | 100 % | — | — | 61 | buy file → |
2026-09-24 — 1 contract, 2 trades, $9.35 turnover
The 1 most traded Longest Winning Streak contracts on 2026-09-24 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 1 still open at the last print: 2 trades, $9.35 USD turnover. The busiest contract was KXMLBWSTREAK-26-ATH with $9.35 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBWSTREAK-26-ATH MLBWSTREAK · ATH | 2026-09-28 00:41 | 0.010 | 0.850 | 0.010 | 0.850 | 0.850 | open | 2 | $9.35 | 100 % | — | — | 33 | buy file → |
2026-09-23 — 6 contracts, 51 trades, $329.26 turnover
The 6 most traded Longest Winning Streak contracts on 2026-09-23 — 1 closed Yes (≥ 0.97), 5 closed No (≤ 0.03): 51 trades, $329.26 USD turnover. The busiest contract was KXMLBWSTREAK-26-BOS with $322.74 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBWSTREAK-26-BOS MLBWSTREAK · BOS | 2026-09-28 00:41 | 0.990 | 0.990 | 0.990 | 0.990 | 0.990 | Yes | 15 | $322.74 | 0 % | — | — | 10.5K | buy file → |
| KXMLBWSTREAK-26-NYM MLBWSTREAK · NYM | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 10 | $2.75 | 0 % | 22.9 ¢ | $9.38 | 254 | buy file → |
| KXMLBWSTREAK-26-HOU MLBWSTREAK · HOU | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 7 | $2.6 | 0 % | 23.0 ¢ | $6.67 | 286 | buy file → |
| KXMLBWSTREAK-26-PHI MLBWSTREAK · PHI | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 8 | $0.56 | 0 % | 22.0 ¢ | $9.55 | 264 | buy file → |
| KXMLBWSTREAK-26-ATH MLBWSTREAK · ATH | 2026-09-28 00:41 | 0.250 | 0.250 | 0.010 | 0.010 | 0.010 | No | 5 | $0.38 | 0 % | 81.2 ¢ | $125.46 | 144 | buy file → |
| KXMLBWSTREAK-26-CWS MLBWSTREAK · CWS | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 6 | $0.23 | 0 % | 19.3 ¢ | $8.49 | 294 | buy file → |
2026-09-22 — 9 contracts, 14 trades, $122.56 turnover
The 9 most traded Longest Winning Streak contracts on 2026-09-22 — 1 closed Yes (≥ 0.97), 7 closed No (≤ 0.03), 1 still open at the last print: 14 trades, $122.56 USD turnover. The busiest contract was KXMLBWSTREAK-26-BOS with $96.03 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBWSTREAK-26-BOS MLBWSTREAK · BOS | 2026-09-28 00:41 | 0.990 | 0.990 | 0.990 | 0.990 | 0.990 | Yes | 1 | $96.03 | 0 % | — | — | 10.3K | buy file → |
| KXMLBWSTREAK-26-NYY MLBWSTREAK · NYY | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $24.39 | 100 % | — | — | 254 | buy file → |
| KXMLBWSTREAK-26-ATH MLBWSTREAK · ATH | 2026-09-28 00:41 | 0.010 | 0.250 | 0.010 | 0.250 | 0.090 | open | 5 | $0.54 | 100 % | — | — | 355 | buy file → |
| KXMLBWSTREAK-26-PHI MLBWSTREAK · PHI | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $0.48 | 100 % | — | — | 378 | buy file → |
| KXMLBWSTREAK-26-NYM MLBWSTREAK · NYM | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $0.48 | 100 % | — | — | 308 | buy file → |
| KXMLBWSTREAK-26-ATL MLBWSTREAK · ATL | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $0.48 | 100 % | — | — | 406 | buy file → |
| KXMLBWSTREAK-26-AZ MLBWSTREAK · AZ | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 2 | $0.12 | 100 % | — | — | 348 | buy file → |
| KXMLBWSTREAK-26-SF MLBWSTREAK · SF | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $0.02 | 100 % | — | — | 308 | buy file → |
| KXMLBWSTREAK-26-MIA MLBWSTREAK · MIA | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $0.02 | 100 % | — | — | 319 | buy file → |
2026-09-21 — 1 contract, 1 trades, $1.66 turnover
The 1 most traded Longest Winning Streak contracts on 2026-09-21 — 0 closed Yes (≥ 0.97), 1 closed No (≤ 0.03): 1 trades, $1.66 USD turnover. The busiest contract was KXMLBWSTREAK-26-TB with $1.66 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBWSTREAK-26-TB MLBWSTREAK · TB | 2026-09-28 00:41 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $1.66 | 100 % | — | — | 57 | buy file → |
2026-09-19 — 1 contract, 2 trades, $953.06 turnover
The 1 most traded Longest Winning Streak contracts on 2026-09-19 — 1 closed Yes (≥ 0.97), 0 closed No (≤ 0.03): 2 trades, $953.06 USD turnover. The busiest contract was KXMLBWSTREAK-26-BOS with $953.06 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBWSTREAK-26-BOS MLBWSTREAK · BOS | 2026-09-28 00:41 | 0.990 | 0.990 | 0.990 | 0.990 | 0.990 | Yes | 2 | $953.06 | 100 % | 6.08 ¢ | $2.2K | 10.3K | buy file → |
MLB on Kalshi — market types across the series
Across 72 MLB series on Kalshi, 883,314 contracts have been listed as of 2026-11-02: player & team props 601,750 · total / over-under 90,394 · spread / handicap 30,874 · moneyline / winner 20,954 and others. Counted from every contract file of the family, not from the traded top-10.
| Market type | Contracts listed (all time) | Listed last 30 days | Share |
|---|---|---|---|
| player & team props | 601,750 | 7,269 | 68 % |
| total / over-under | 90,394 | 1,529 | 10 % |
| spread / handicap | 30,874 | 355 | 3 % |
| moneyline / winner | 20,954 | 1,087 | 2 % |
| period markets | 14,547 | 279 | 2 % |
| strike ladder | 212 | 0 | 0 % |
| other | 124,583 | 3,110 | 14 % |
| Total | 883,314 | 13,629 | 100 % |
Kalshi MLB series— market type read from each contract's venue identifier (ticker suffix on Kalshi, slug suffix on Polymarket, market description on predict.fun and OG.com), counted over every contract listed in the family as of 2026-11-02; “listed last 30 days” counts contracts whose venue settlement time falls in that window. Every one of them is in the day bundle of its day.
How a Longest Winning Streak contract trades
On Kalshi, a Longest Winning Streak contract trades for about 208 days from open to close, is listed roughly 41 h before it opens, and quotes in 1 ¢ price steps (0..1). Measured on the 2 contracts captured on 2026-09-26.
Build a Longest Winning Streak model on this data
Every settled Longest Winning Streak contract is a labelled example: the winner, the line or the total that cleared is the label, and the day bundle holds each contract's full order-book path and trade tape, nanosecond-stamped, from the first quote days before the event to the last print — the features for that label. The statistics on this page cover the most traded contracts per day; the bundle holds every contract listed on Kalshi that day.
Split by season and match day, never at random — the contracts of one slate share injuries, weather and the same public money, and a random split leaks the slate's results into training; walk forward over game days and purge the days whose contracts were still open. The sports-model guide works the closing-line benchmark, the pre-game line path and that split through.
Purchased data is for your own use — backtesting, research, analytics and training your own models, in-house or in your own products; the trained models and derived data you build from it are yours. The raw files and tick streams themselves may not be redistributed, resold or published. The full terms are on the data license page.
Why buy Kalshi Longest Winning Streak data here
Four things every page on this site is built on — and the reason the numbers above exist at all.
We record everything
The complete public feed of each venue as it was published: every Level-2 snapshot and update at the venue's full book depth, every trade with its aggressor side, every quote, funding, mark-price and liquidation event — for every instrument the venue lists, every UTC day since we added the venue. Nothing sampled, no top-N cut, no on-demand capture.
Institutional grade
Captured co-located at the venue with the exchange timestamp and our receive timestamp in integer nanoseconds, an event-id chain that makes any gap visible, and one normalized schema across 35+ venues — the same capture our own high-frequency trading engine and enterprise feeds run on.
€1 per instrument-day
Any instrument-day is €1, series-day bundles start at €1 — no subscription, no minimum order, no tiers to unlock. Credit packs lower the effective price and never expire, and every venue has free full-day samples to test against first.
Self-service for everyone
Pick the days in the Data Shop, pay by card as a guest and download immediately — no sales call, no enterprise contract, no KYC. Coding agents buy the same files through the MCP server, and the free Agent Skill teaches them the format.
Agents: /llms.txt · MCP server /mcp · every page as markdown via Accept: text/markdown
Kalshi Longest Winning Streak data — FAQ
What Kalshi Longest Winning Streak data can I download?
Tick-by-tick trades and Level-2 order-book depth for every contract of the Longest Winning Streak series on Kalshi (30 contract files on the latest day). One bundle = one UTC day of the whole series.
What is the Kalshi series ticker for Longest Winning Streak?
KXMLBWSTREAK — every contract of the series carries this prefix in its ticker (followed by the event date and strike). Files in a day bundle are named by the full contract ticker, so a bundle holds every KXMLBWSTREAK-* contract listed that UTC day.
How far back does the Longest Winning Streak data go?
Coverage runs March 2026 – present — 209 trading days in total.
What format are the Kalshi files in?
One zstd-compressed text file per contract per UTC day, in the same normalized schema as our crypto venues — see the market-data specification; free samples on the downloads page.
Can I get Kalshi Longest Winning Streak data as CSV or Parquet?
Yes — trades export as gzipped CSV or Parquet at no extra cost, with integer microsecond UTC timestamps that load straight into pandas, polars or DuckDB. Kalshi records full order-book depth without a separate BBO stream, so book data ships in the native tick file — the free reader script converts it locally. See the formats overview.
How much does Kalshi Longest Winning Streak historical data cost?
€1 per series-day bundle — every contract of the series for that day — no subscription, no minimum order; buy as a guest in the Data Shop and download immediately. Credit packs lower the effective price and never expire.
Do I need an account or a sales call?
No. Pick the Longest Winning Streak series-days in the Data Shop, pay by card as a guest and download immediately — no subscription, no minimum order, no KYC, no enterprise contract, no sales call. Coding agents buy the same bundles through the MCP server.
How is the Kalshi Longest Winning Streak data captured?
Co-located at the venue, message by message: every Level-2 update and every trade print carries the exchange timestamp and our receive timestamp in integer nanoseconds, an event-id chain makes any gap visible, and one normalized schema across 35+ venues means a parser written for Binance reads these files unchanged. It is the same capture our own high-frequency trading engine runs on — nothing sampled, no top-N cut.
What was the most traded Longest Winning Streak contract on 2026-09-26?
KXMLBWSTREAK-26-BOS (MLBWSTREAK · BOS) — $1.2K USD turnover over 1 trade on Kalshi. The 2 most traded contracts of the series did 2 trades and $1.2K that UTC day. Open, high, low, close and VWAP per contract are listed on this page; the tick-level data is in the day bundle.
What was the busiest Longest Winning Streak trading day on Kalshi?
2026-09-11, with $1.2K of USD turnover over 26 trades across every Longest Winning Streak contract of the day; the busiest full month was Sep 2026 at $6.8K. Since our statistics began on 2026-08-09 the series has recorded 262 trades and $7.9K over 51 captured days; the single biggest contract was KXMLBWSTREAK-26-BOS (MLBWSTREAK · BOS) on 2026-09-11 with $1.2K. Any of these days is a downloadable bundle.
Which market types does Kalshi list for MLB?
Kalshi lists each market type as its own series — 72 MLB series with 883,314 contracts listed as of 2026-11-02: player & team props 601,750 · total / over-under 90,394 · spread / handicap 30,874 · moneyline / winner 20,954 · period markets 14,547. Longest Winning Streak is one of them; a series-day bundle covers one series, so buy the same day across the sibling series you need in the shop.