Kalshi KXSERIEA — Serie A Historical Data
Every Kalshi “Serie A ” contract of the day — every trade print and the complete Level-2 book, captured co-located with nanosecond venue and receive timestamps. 152 trading days as day bundles, €1 per day, bought as a guest with instant download.
Serie A on Kalshi — activity
Trades and USD turnover summed over every contract of the series across 30 captured days to 2026-10-12, from the recorded tick data — the per-day averages divide by the captured days. Buy share, quoted spread (in contract price cents, 0..1 = 100 ¢), best-bid/ask depth and Level-2 update counts are turnover-weighted over the same window.
One purchase, the whole series for a day
A series-day bundle contains every Serie A contract that was listed on Kalshi on that UTC day — traded or not — 20 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 — 152 trading days, 48.9 MB compressed in total. A day typically holds 20 contract files (up to 20 on the busiest day, 2.04 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.
Serie A — development since capture
1,746 trades and $39.4K of USD turnover over 65 captured days since 2026-08-09 — record day 2026-09-05 with $4.3K, biggest single contract KXSERIEA-27-INT (2026-09-05, $3.6K).
| Month | Days | Trades | Turnover (USD) | Avg / day | Contracts traded | L2 updates | vs previous month |
|---|---|---|---|---|---|---|---|
| Oct 2026 (month to date) | 12 | 160 | $2.6K | $214.58 | 52 | 203.1K | — |
| Sep 2026 | 30 | 1,106 | $19.1K | $637.93 | 153 | 404.5K | +8.2 % |
| Aug 2026 | 23 | 480 | $17.7K | $768.89 | 122 | 208.6K | — |
Kalshi Serie A — 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.
Serie A — activity by weekday
Wednesdays carry the most turnover, about $650.19 per day.
| Weekday (UTC) | Avg turnover / day | USD | Avg trades | Days |
|---|---|---|---|---|
| Monday | $319.79 | 29.2 | 5 | |
| Tuesday | $391.54 | 33.5 | 4 | |
| Wednesday | $650.19 | 25.5 | 4 | |
| Thursday | $195.52 | 25.25 | 4 | |
| Friday | $107.95 | 20.5 | 4 | |
| Saturday | $268.16 | 27 | 4 | |
| Sunday | $442.09 | 34.4 | 5 |
Kalshi Serie A — average USD turnover and trades per weekday over the captured days of the last 30, from our own daily statistics; weekdays without a captured day show —.
Serie A — 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-10-12 | 20 | 560 KB | 4 | 9 | $90.93 | 95 % | 3.33 ¢ | $355.87 | 17.9K | Buy day → | |
| 2026-10-11 | 20 | 425 KB | 4 | 31 | $1.3K | 99 % | 3.16 ¢ | $330.29 | 12.3K | Buy day → | |
| 2026-10-10 | 20 | 1.10 MB | 6 | 22 | $114.69 | 59 % | 2.95 ¢ | $78.83 | 41.2K | Buy day → | |
| 2026-10-09 | 20 | 654 KB | 5 | 14 | $59.97 | 89 % | 1.31 ¢ | $302.67 | 20.1K | Buy day → | |
| 2026-10-08 | 20 | 427 KB | 5 | 7 | $148 | 100 % | 1.48 ¢ | $764.62 | 11.2K | Buy day → | |
| 2026-10-07 | 20 | 754 KB | 4 | 12 | $120.33 | 76 % | 2.27 ¢ | $234.24 | 24.4K | Buy day → | |
| 2026-10-06 | 20 | 621 KB | 3 | 5 | $62.67 | 90 % | 1.67 ¢ | $109.73 | 19.1K | Buy day → | |
| 2026-10-05 | 20 | 368 KB | 4 | 9 | $257.29 | 2 % | 1.05 ¢ | $546.13 | 9.0K | Buy day → | |
| 2026-10-04 | 20 | 443 KB | 3 | 12 | $75.85 | 20 % | 1.22 ¢ | $229.24 | 11.7K | Buy day → | |
| 2026-10-03 | 20 | 648 KB | 3 | 6 | $12.15 | 54 % | 1.64 ¢ | $151.28 | 17.5K | Buy day → | |
| 2026-10-02 | 20 | 503 KB | 6 | 14 | $69.71 | 97 % | 1.91 ¢ | $108.53 | 12.6K | Buy day → | |
| 2026-10-01 | 20 | 260 KB | 5 | 19 | $288.91 | 7 % | 1.21 ¢ | $171.02 | 6.2K | Buy day → | |
| 2026-09-30 | 20 | 368 KB | 4 | 12 | $692.83 | 99 % | 1.28 ¢ | $107.61 | 10.8K | Buy day → | |
| 2026-09-29 | 20 | 179 KB | 3 | 26 | $917.88 | 74 % | 2.30 ¢ | $198 | 3.8K | Buy day → | |
| 2026-09-28 | 20 | 714 KB | 3 | 5 | $17.01 | 100 % | 1.75 ¢ | $61.23 | 20.8K | Buy day → | |
| 2026-09-27 | 20 | 876 KB | 3 | 8 | $19.36 | 62 % | 2.18 ¢ | $47.3 | 26.0K | Buy day → | |
| 2026-09-26 | 20 | 879 KB | 5 | 8 | $4.86 | 19 % | 1.97 ¢ | $80.99 | 26.1K | Buy day → | |
| 2026-09-25 | 20 | 757 KB | 7 | 33 | $272.71 | 99 % | 1.76 ¢ | $94.27 | 22.7K | Buy day → | |
| 2026-09-24 | 20 | 1.12 MB | 5 | 22 | $97.52 | 31 % | 1.35 ¢ | $40.29 | 34.5K | Buy day → | |
| 2026-09-23 | 20 | 2.04 MB | 5 | 46 | $1.7K | 91 % | 1.52 ¢ | $74.93 | 72.8K | Buy day → | |
| 2026-09-22 | 20 | 944 KB | 6 | 32 | $114.47 | 63 % | 1.48 ¢ | $51.1 | 28.9K | Buy day → | |
| 2026-09-21 | 20 | 791 KB | 6 | 39 | $257.74 | 38 % | 2.04 ¢ | $40.68 | 24.4K | Buy day → | |
| 2026-09-20 | 20 | 333 KB | 6 | 86 | $721.82 | 85 % | 4.69 ¢ | $2.2K | 8.1K | Buy day → | |
| 2026-09-19 | 20 | 780 KB | 6 | 72 | $940.95 | 70 % | 2.41 ¢ | $130.68 | 25.1K | Buy day → | |
| 2026-09-18 | 20 | 273 KB | 6 | 21 | $29.42 | 100 % | 1.36 ¢ | $30.39 | 4.9K | Buy day → | |
| 2026-09-17 | 20 | 347 KB | 5 | 53 | $247.66 | 68 % | 2.71 ¢ | $127.74 | 7.5K | Buy day → | |
| 2026-09-16 | 20 | 216 KB | 4 | 32 | $63.78 | 73 % | 2.10 ¢ | $48.65 | 4.7K | Buy day → | |
| 2026-09-15 | 20 | 440 KB | 6 | 71 | $471.16 | 85 % | 3.47 ¢ | $163.21 | 13.1K | Buy day → | |
| 2026-09-14 | 20 | 207 KB | 5 | 84 | $975.98 | 83 % | 2.26 ¢ | $73.37 | 4.8K | Buy day → | |
| 2026-09-13 | 20 | 174 KB | 6 | 35 | $118.9 | 65 % | 1.76 ¢ | $92.62 | 3.9K | 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 Serie A 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 4 most traded Serie A contracts on 2026-10-12 — 0 closed Yes (≥ 0.97), 2 closed No (≤ 0.03), 2 still open at the last print: 9 trades, $90.93 USD turnover. The busiest contract was KXSERIEA-27-INT with $81.5 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXSERIEA-27-INT | 0.620 | 0.630 | 0.620 | 0.630 | 0.622 | open | 3 | $81.5 | 100 % | buy file → |
| KXSERIEA-27-ACM | 0.040 | 0.080 | 0.040 | 0.070 | 0.062 | open | 3 | $6.3 | 75 % | buy file → |
| KXSERIEA-27-NAP | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | No | 1 | $2.63 | 0 % | buy file → |
| KXSERIEA-27-JUV | 0.010 | 0.020 | 0.010 | 0.010 | 0.014 | No | 2 | $0.5 | 0 % | 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.
2026-10-11 — 4 contracts, 31 trades, $1.3K turnover
The 4 most traded Serie A contracts on 2026-10-11 — 0 closed Yes (≥ 0.97), 1 closed No (≤ 0.03), 3 still open at the last print: 31 trades, $1.3K USD turnover. The busiest contract was KXSERIEA-27-INT with $1.1K turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXSERIEA-27-INT | 0.600 | 0.620 | 0.580 | 0.620 | 0.593 | open | 8 | $1.1K | 100 % | buy file → |
| KXSERIEA-27-ACM | 0.060 | 0.080 | 0.040 | 0.040 | 0.079 | open | 6 | $87.98 | 99 % | buy file → |
| KXSERIEA-27-JUV | 0.080 | 0.080 | 0.010 | 0.010 | 0.030 | No | 14 | $32.66 | 72 % | buy file → |
| KXSERIEA-27-ROM | 0.220 | 0.220 | 0.170 | 0.170 | 0.220 | open | 3 | $23.05 | 99 % | buy file → |
2026-10-10 — 6 contracts, 22 trades, $114.69 turnover
The 6 most traded Serie A contracts on 2026-10-10 — 0 closed Yes (≥ 0.97), 1 closed No (≤ 0.03), 5 still open at the last print: 22 trades, $114.69 USD turnover. The busiest contract was KXSERIEA-27-INT with $98.86 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXSERIEA-27-INT | 0.550 | 0.600 | 0.530 | 0.600 | 0.563 | open | 11 | $98.86 | 56 % | buy file → |
| KXSERIEA-27-ROM | 0.200 | 0.220 | 0.200 | 0.220 | 0.219 | open | 3 | $9.48 | 100 % | buy file → |
| KXSERIEA-27-COM | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | open | 1 | $4.02 | 0 % | buy file → |
| KXSERIEA-27-ACM | 0.050 | 0.080 | 0.050 | 0.060 | 0.075 | open | 4 | $2.13 | 89 % | buy file → |
| KXSERIEA-27-JUV | 0.070 | 0.080 | 0.070 | 0.080 | 0.080 | open | 1 | $0.17 | 100 % | buy file → |
| KXSERIEA-27-NAP | 0.040 | 0.040 | 0.030 | 0.030 | 0.030 | No | 2 | $0.03 | 0 % | buy file → |
2026-10-09 — 5 contracts, 14 trades, $59.97 turnover
The 5 most traded Serie A contracts on 2026-10-09 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 5 still open at the last print: 14 trades, $59.97 USD turnover. The busiest contract was KXSERIEA-27-INT with $54.24 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXSERIEA-27-INT | 0.560 | 0.560 | 0.550 | 0.550 | 0.560 | open | 4 | $54.24 | 99 % | buy file → |
| KXSERIEA-27-ACM | 0.080 | 0.080 | 0.050 | 0.050 | 0.051 | open | 3 | $2.84 | 0 % | buy file → |
| KXSERIEA-27-COM | 0.080 | 0.080 | 0.040 | 0.040 | 0.040 | open | 1 | $1.88 | 0 % | buy file → |
| KXSERIEA-27-NAP | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | open | 5 | $0.94 | 0 % | buy file → |
| KXSERIEA-27-JUV | 0.070 | 0.070 | 0.070 | 0.070 | 0.070 | open | 1 | $0.07 | 0 % | buy file → |
2026-10-08 — 5 contracts, 7 trades, $148 turnover
The 5 most traded Serie A contracts on 2026-10-08 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 5 still open at the last print: 7 trades, $148 USD turnover. The busiest contract was KXSERIEA-27-INT with $144.48 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXSERIEA-27-INT | 0.550 | 0.560 | 0.550 | 0.560 | 0.560 | open | 1 | $144.48 | 100 % | buy file → |
| KXSERIEA-27-COM | 0.070 | 0.080 | 0.070 | 0.080 | 0.080 | open | 1 | $2.36 | 100 % | buy file → |
| KXSERIEA-27-ACM | 0.050 | 0.080 | 0.050 | 0.080 | 0.080 | open | 1 | $0.94 | 100 % | buy file → |
| KXSERIEA-27-JUV | 0.070 | 0.070 | 0.070 | 0.070 | 0.070 | open | 2 | $0.14 | 0 % | buy file → |
| KXSERIEA-27-NAP | 0.050 | 0.050 | 0.040 | 0.040 | 0.040 | open | 2 | $0.08 | 0 % | buy file → |
2026-10-07 — 4 contracts, 12 trades, $120.33 turnover
The 4 most traded Serie A contracts on 2026-10-07 — 0 closed Yes (≥ 0.97), 1 closed No (≤ 0.03), 3 still open at the last print: 12 trades, $120.33 USD turnover. The busiest contract was KXSERIEA-27-COM with $82.58 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXSERIEA-27-COM | 0.060 | 0.070 | 0.060 | 0.070 | 0.062 | open | 5 | $82.58 | 100 % | buy file → |
| KXSERIEA-27-INT | 0.530 | 0.550 | 0.530 | 0.550 | 0.550 | open | 1 | $27.19 | 0 % | buy file → |
| KXSERIEA-27-LAZ | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 2 | $9.36 | 100 % | buy file → |
| KXSERIEA-27-ACM | 0.060 | 0.060 | 0.050 | 0.050 | 0.051 | open | 4 | $1.2 | 0 % | buy file → |
2026-10-06 — 3 contracts, 5 trades, $62.67 turnover
The 3 most traded Serie A contracts on 2026-10-06 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 3 still open at the last print: 5 trades, $62.67 USD turnover. The busiest contract was KXSERIEA-27-NAP with $56.27 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXSERIEA-27-NAP | 0.050 | 0.050 | 0.050 | 0.050 | 0.050 | open | 3 | $56.27 | 100 % | buy file → |
| KXSERIEA-27-ROM | 0.210 | 0.210 | 0.200 | 0.200 | 0.200 | open | 1 | $5.87 | 0 % | buy file → |
| KXSERIEA-27-INT | 0.530 | 0.530 | 0.530 | 0.530 | 0.530 | open | 1 | $0.53 | 0 % | buy file → |
How a Serie A contract trades
On Kalshi, a Serie A contract trades until its event settles, is listed roughly 4 min before it opens, and quotes in 1 ¢ price steps (0..1). Measured on the 4 contracts captured on 2026-10-12.
Try a Serie A contract file for free
The busiest contract of a settled day, byte-identical to the files in the paid bundle — download the native tick file, a CSV/Parquet export, or replay its order book in the browser.
KXSERIEA-27-INT minute by minute — 2026-10-05
One-minute open/high/low/close, trades, USD turnover, quoted spread and top-of-book depth of the sample contract — the same 1-minute statistics every instrument’s analytics page offers.
KXSERIEA-27-INT traded in 1 of the day’s minutes (00:34–00:34 UTC): 2 trades, $248.52 turnover, opening at 0.560, ranging 0.560–0.560 and closing at 0.560.
| Minute (UTC) | Open | High | Low | Close | Trades | Turnover | Spread | Top-1 bid / ask |
|---|---|---|---|---|---|---|---|---|
| 00:34 | 0.560 | 0.560 | 0.560 | 0.560 | 2 | $248.52 | 1.00 ¢ | $175.66 / $865.17 |
1-minute statistics computed from the recorded ticks; minutes without a trade are omitted. Spread in contract price cents; top-1 depth = resting notional at the best bid / best ask. Every minute of every day is in the free analytics; the raw ticks are in the sample file above.
Why buy Kalshi Serie A 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 Serie A data — FAQ
What Kalshi Serie A data can I download?
Tick-by-tick trades and Level-2 order-book depth for every contract of the Serie A series on Kalshi (20 contract files on the latest day). One bundle = one UTC day of the whole series.
What is the Kalshi series ticker for Serie A ?
KXSERIEA — 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 KXSERIEA-* contract listed that UTC day.
How far back does the Serie A data go?
Coverage runs March 2026 – present — 152 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 Serie A 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 Serie A 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 Serie A 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 Serie A 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.
How many Serie A contracts trade per day on Kalshi?
On average 5 Serie A contracts had at least one trade per UTC day over the last 30 captured days on Kalshi, with about 18.2K order-book level updates recorded per day. A day bundle contains every contract file of the series for that day.
How liquid are Kalshi Serie A contracts?
Over the last 30 captured days, the turnover-weighted quoted bid-ask spread was 2.31 ¢ (contracts quote 0..1 = 100 ¢), the mean best-bid/best-ask notional was about $312.95 per side, 79 % of USD turnover was taker-buy. These figures are computed from the recorded Level-2 order books and trade prints — the same data in the day bundles.
What was the most traded Serie A contract on 2026-10-12?
KXSERIEA-27-INT — $81.5 USD turnover over 3 trades on Kalshi. The 4 most traded contracts of the series did 9 trades and $90.93 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 Serie A trading day on Kalshi?
2026-09-05, with $4.3K of USD turnover over 48 trades across every Serie A contract of the day; the busiest full month was Sep 2026 at $19.1K. Since our statistics began on 2026-08-09 the series has recorded 1,746 trades and $39.4K over 65 captured days; the single biggest contract was KXSERIEA-27-INT on 2026-09-05 with $3.6K. Any of these days is a downloadable bundle.