Kalshi KXB200WS — B200 Weekly Historical Data
Every Kalshi “B200 Weekly” contract of the day — every trade print and the complete Level-2 book, captured co-located with nanosecond venue and receive timestamps. 120 trading days as day bundles, €1 per day, bought as a guest with instant download.
B200 Weekly on Kalshi — activity
Trades and USD turnover summed over every contract of the series across 24 captured days to 2026-10-09, 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 B200 Weekly contract that was listed on Kalshi on that UTC day — traded or not — 13 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 June 2026 – present — 120 trading days, 203 MB compressed in total. A day typically holds 62 contract files (up to 115 on the busiest day, 6.13 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.
B200 Weekly — development since capture
9,613 trades and $210.6K of USD turnover over 84 captured days since 2026-07-18 — record day 2026-08-01 with $17.8K, biggest single contract KXB200WS-26AUG28-5.500 (2026-08-28, $4.7K).
| Month | Days | Trades | Turnover (USD) | Avg / day | Contracts traded | L2 updates | vs previous month |
|---|---|---|---|---|---|---|---|
| Oct 2026 (month to date) | 9 | 94 | $3.0K | $329.11 | 19 | 33.6K | — |
| Sep 2026 | 30 | 849 | $45.6K | $1.5K | 171 | 726.1K | −59.7 % |
| Aug 2026 | 31 | 4,899 | $113.1K | $3.6K | 396 | 1.5M | +130.6 % |
| Jul 2026 | 14 | 3,771 | $49.0K | $3.5K | — | — | — |
Kalshi B200 Weekly — 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.
B200 Weekly — activity by weekday
Wednesdays carry the most turnover, about $556.82 per day.
| Weekday (UTC) | Avg turnover / day | USD | Avg trades | Days |
|---|---|---|---|---|
| Monday | $34.54 | 5 | 3 | |
| Tuesday | $116.8 | 4.67 | 3 | |
| Wednesday | $556.82 | 10.25 | 4 | |
| Thursday | $551.33 | 14.25 | 4 | |
| Friday | $412.26 | 23.75 | 4 | |
| Saturday | $64.07 | 1.67 | 3 | |
| Sunday | $48.36 | 1.67 | 3 |
Kalshi B200 Weekly — 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 —.
B200 Weekly — 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-10-09 | 13 | 336 KB | 4 | 41 | $229.77 | 95 % | 32.8 ¢ | $44.89 | 9.9K | Buy day → | |
| 2026-10-08 | 13 | 226 KB | 2 | 14 | $884.27 | 77 % | 8.36 ¢ | $136.3 | 6.0K | Buy day → | |
| 2026-10-07 | 13 | 140 KB | 2 | 5 | $1.2K | 0 % | 5.32 ¢ | $57.76 | 3.1K | Buy day → | |
| 2026-10-06 | 13 | 163 KB | 3 | 6 | $300.01 | 94 % | 7.63 ¢ | $160.79 | 3.9K | Buy day → | |
| 2026-10-05 | 13 | 111 KB | 3 | 5 | $2.87 | 2 % | 32.3 ¢ | $45.53 | 2.0K | Buy day → | |
| 2026-10-04 | 13 | 101 KB | 0 | 0 | $0 | — | — | — | 1.5K | Buy day → | |
| 2026-10-03 | 13 | 130 KB | 0 | 0 | $0 | — | — | — | 2.1K | Buy day → | |
| 2026-10-02 | 26 | 169 KB | 1 | 17 | $49.91 | 38 % | 47.2 ¢ | $16.34 | 3.4K | Buy day → | |
| 2026-10-01 | 13 | 89.4 KB | 4 | 6 | $321.7 | 58 % | 28.2 ¢ | $156.26 | 1.8K | Buy day → | |
| 2026-09-30 | 13 | 61.1 KB | 0 | 0 | $0 | — | — | — | 1.0K | Buy day → | |
| 2026-09-29 | 13 | 86.4 KB | 1 | 3 | $14.99 | 100 % | 56.8 ¢ | $38.86 | 2.0K | Buy day → | |
| 2026-09-28 | 13 | 46.5 KB | 1 | 4 | $2.06 | 45 % | 43.8 ¢ | $25.17 | 563 | Buy day → | |
| 2026-09-27 | 13 | 30.0 KB | 0 | 0 | $0 | — | — | — | 248 | Buy day → | |
| 2026-09-26 | 13 | 60.7 KB | 0 | 0 | $0 | — | — | — | 820 | Buy day → | |
| 2026-09-25 | 26 | 167 KB | 7 | 19 | $599.5 | 54 % | 7.84 ¢ | $98.46 | 3.2K | Buy day → | |
| 2026-09-24 | 26 | 172 KB | 3 | 5 | $505.65 | 84 % | 20.4 ¢ | $124.63 | 3.1K | Buy day → | |
| 2026-09-23 | 26 | 221 KB | 0 | 0 | $0 | — | — | — | 4.3K | Buy day → | |
| 2026-09-22 | 26 | 286 KB | 4 | 5 | $35.41 | 72 % | 10.4 ¢ | $98.46 | 6.7K | Buy day → | |
| 2026-09-21 | 26 | 323 KB | 3 | 6 | $98.7 | 100 % | 12.1 ¢ | $87.46 | 8.5K | Buy day → | |
| 2026-09-20 | 26 | 185 KB | 4 | 5 | $145.09 | 98 % | 7.83 ¢ | $101.05 | 3.5K | Buy day → | |
| 2026-09-19 | 26 | 358 KB | 5 | 5 | $192.21 | 100 % | 8.82 ¢ | $54.14 | 8.3K | Buy day → | |
| 2026-09-18 | 39 | 1.94 MB | 7 | 18 | $769.86 | 55 % | 21.1 ¢ | $76.81 | 61.5K | Buy day → | |
| 2026-09-17 | 39 | 827 KB | 3 | 32 | $493.72 | 41 % | 9.61 ¢ | $32.02 | 20.3K | Buy day → | |
| 2026-09-16 | 39 | 2.16 MB | 5 | 36 | $1.1K | 91 % | 6.79 ¢ | $66.26 | 64.0K | Buy day → | |
| 2026-09-15 | 39 | 4.04 MB | 10 | 72 | $1.9K | 75 % | 6.82 ¢ | $57.33 | 158.9K | Buy day → | |
| 2026-09-14 | 39 | 1.39 MB | 8 | 103 | $4.0K | 19 % | 6.75 ¢ | $88.08 | 48.1K | Buy day → | |
| 2026-09-13 | 39 | 837 KB | 6 | 65 | $3.6K | 88 % | 6.39 ¢ | $142.39 | 23.6K | Buy day → | |
| 2026-09-12 | 39 | 2.03 MB | 2 | 8 | $254.03 | 5 % | 8.80 ¢ | $26.9 | 62.6K | Buy day → | |
| 2026-09-11 | 52 | 899 KB | 10 | 29 | $1.2K | 19 % | 1.81 ¢ | $166.1 | 18.0K | Buy day → | |
| 2026-09-10 | 52 | 1.09 MB | 20 | 82 | $2.1K | 82 % | 4.89 ¢ | $411.16 | 30.1K | 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 B200 Weekly 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 B200 Weekly contracts on 2026-10-09 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 4 still open at the last print: 41 trades, $229.77 USD turnover. The busiest contract was KXB200WS-26OCT09-7.500 with $214.64 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXB200WS-26OCT09-7.500 | 0.540 | 0.720 | 0.010 | 0.380 | 0.426 | open | 38 | $214.64 | 96 % | buy file → |
| KXB200WS-26OCT09-8.500 | 0.020 | 0.110 | 0.020 | 0.110 | 0.110 | open | 1 | $14.12 | 100 % | buy file → |
| KXB200WS-26OCT09-5.000 | 0.900 | 0.900 | 0.900 | 0.900 | 0.900 | open | 1 | $0.9 | 0 % | buy file → |
| KXB200WS-26OCT09-8.000 | 0.100 | 0.110 | 0.100 | 0.110 | 0.110 | open | 1 | $0.11 | 100 % | 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.
2026-10-08 — 2 contracts, 14 trades, $884.27 turnover
The 2 most traded B200 Weekly contracts on 2026-10-08 — 1 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 1 still open at the last print: 14 trades, $884.27 USD turnover. The busiest contract was KXB200WS-26OCT09-7.500 with $502.27 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXB200WS-26OCT09-7.500 | 0.520 | 0.540 | 0.480 | 0.540 | 0.506 | open | 12 | $502.27 | 60 % | buy file → |
| KXB200WS-26OCT09-7.000 | 0.930 | 0.970 | 0.930 | 0.970 | 0.955 | Yes | 2 | $382 | 100 % | buy file → |
2026-10-07 — 2 contracts, 5 trades, $1.2K turnover
The 2 most traded B200 Weekly contracts on 2026-10-07 — 1 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 1 still open at the last print: 5 trades, $1.2K USD turnover. The busiest contract was KXB200WS-26OCT09-4.500 with $1.1K turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXB200WS-26OCT09-4.500 | 0.990 | 0.990 | 0.990 | 0.990 | 0.990 | Yes | 1 | $1.1K | 0 % | buy file → |
| KXB200WS-26OCT09-7.500 | 0.480 | 0.610 | 0.480 | 0.520 | 0.549 | open | 4 | $117.1 | 0 % | buy file → |
2026-10-06 — 3 contracts, 6 trades, $300.01 turnover
The 3 most traded B200 Weekly contracts on 2026-10-06 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 3 still open at the last print: 6 trades, $300.01 USD turnover. The busiest contract was KXB200WS-26OCT09-7.000 with $186 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXB200WS-26OCT09-7.000 | 0.930 | 0.930 | 0.930 | 0.930 | 0.930 | open | 1 | $186 | 100 % | buy file → |
| KXB200WS-26OCT09-7.500 | 0.010 | 0.480 | 0.010 | 0.480 | 0.480 | open | 3 | $97.41 | 99 % | buy file → |
| KXB200WS-26OCT09-8.000 | 0.210 | 0.210 | 0.100 | 0.100 | 0.100 | open | 2 | $16.6 | 0 % | buy file → |
2026-10-05 — 3 contracts, 5 trades, $2.87 turnover
The 3 most traded B200 Weekly contracts on 2026-10-05 — 0 closed Yes (≥ 0.97), 2 closed No (≤ 0.03), 1 still open at the last print: 5 trades, $2.87 USD turnover. The busiest contract was KXB200WS-26OCT09-8.000 with $2.72 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXB200WS-26OCT09-8.000 | 0.210 | 0.210 | 0.210 | 0.210 | 0.210 | open | 3 | $2.72 | 0 % | buy file → |
| KXB200WS-26OCT09-8.500 | 0.020 | 0.020 | 0.020 | 0.020 | 0.020 | No | 1 | $0.1 | 0 % | buy file → |
| KXB200WS-26OCT09-7.500 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $0.05 | 100 % | buy file → |
2026-10-02 — 1 contract, 17 trades, $49.91 turnover
The 1 most traded B200 Weekly contracts on 2026-10-02 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 1 still open at the last print: 17 trades, $49.91 USD turnover. The busiest contract was KXB200WS-26OCT02-8.000 with $49.91 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXB200WS-26OCT02-8.000 | 0.370 | 0.370 | 0.010 | 0.070 | 0.023 | open | 17 | $49.91 | 38 % | buy file → |
2026-10-01 — 4 contracts, 6 trades, $321.7 turnover
The 4 most traded B200 Weekly contracts on 2026-10-01 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 4 still open at the last print: 6 trades, $321.7 USD turnover. The busiest contract was KXB200WS-26OCT02-7.500 with $188 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | |
|---|---|---|---|---|---|---|---|---|---|---|
| KXB200WS-26OCT02-7.500 | 0.800 | 0.940 | 0.800 | 0.940 | 0.940 | open | 1 | $188 | 100 % | buy file → |
| KXB200WS-26OCT02-8.000 | 0.810 | 0.810 | 0.370 | 0.370 | 0.380 | open | 2 | $79.7 | 0 % | buy file → |
| KXB200WS-26OCT02-8.500 | 0.410 | 0.410 | 0.060 | 0.060 | 0.105 | open | 2 | $42 | 0 % | buy file → |
| KXB200WS-26OCT02-9.000 | 0.060 | 0.060 | 0.060 | 0.060 | 0.060 | open | 1 | $12 | 0 % | buy file → |
How a B200 Weekly contract trades
On Kalshi, a B200 Weekly contract trades for about 42 days from open to close, is listed roughly 10 min before it opens, and quotes in 1 ¢ price steps (0..1). Measured on the 4 contracts captured on 2026-10-09.
Try a B200 Weekly 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.
KXB200WS-26OCT09-4.500 minute by minute — 2026-10-07
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.
KXB200WS-26OCT09-4.500 traded in 1 of the day’s minutes (05:15–05:15 UTC): 1 trades, $1.1K turnover, opening at 0.990, ranging 0.990–0.990 and closing at 0.990.
| Minute (UTC) | Open | High | Low | Close | Trades | Turnover | Spread | Top-1 bid / ask |
|---|---|---|---|---|---|---|---|---|
| 05:15 | 0.990 | 0.990 | 0.990 | 0.990 | 1 | $1.1K | — | — |
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 B200 Weekly 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 B200 Weekly data — FAQ
What Kalshi B200 Weekly data can I download?
Tick-by-tick trades and Level-2 order-book depth for every contract of the B200 Weekly series on Kalshi (13 contract files on the latest day). One bundle = one UTC day of the whole series.
What is the Kalshi series ticker for B200 Weekly?
KXB200WS — 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 KXB200WS-* contract listed that UTC day.
How far back does the B200 Weekly data go?
Coverage runs June 2026 – present — 120 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 B200 Weekly 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 B200 Weekly 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 B200 Weekly 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 B200 Weekly 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 B200 Weekly contracts trade per day on Kalshi?
On average 3 B200 Weekly contracts had at least one trade per UTC day over the last 24 captured days on Kalshi, with about 9.2K order-book level updates recorded per day. A day bundle contains every contract file of the series for that day.
How liquid are Kalshi B200 Weekly contracts?
Over the last 24 captured days, the turnover-weighted quoted bid-ask spread was 12.1 ¢ (contracts quote 0..1 = 100 ¢), the mean best-bid/best-ask notional was about $87.69 per side, 61 % 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 B200 Weekly contract on 2026-10-09?
KXB200WS-26OCT09-7.500 — $214.64 USD turnover over 38 trades on Kalshi. The 4 most traded contracts of the series did 41 trades and $229.77 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 B200 Weekly trading day on Kalshi?
2026-08-01, with $17.8K of USD turnover over 390 trades across every B200 Weekly contract of the day; the busiest full month was Aug 2026 at $113.1K. Since our statistics began on 2026-07-18 the series has recorded 9,613 trades and $210.6K over 84 captured days; the single biggest contract was KXB200WS-26AUG28-5.500 on 2026-08-28 with $4.7K. Any of these days is a downloadable bundle.