Kalshi Supreme Court decisions Data
Every Kalshi “Supreme Court decisions” contract of the day — every trade print and the complete Level-2 book, captured co-located with nanosecond venue and receive timestamps. 113 trading days as day bundles, €1 per day, bought as a guest with instant download.
Supreme Court decisions on Kalshi — activity
Trades and USD turnover summed over every contract of the series across 30 captured days to 2026-11-11, 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 Supreme Court decisions contract that was listed on Kalshi on that UTC day — traded or not — 24 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 July 2026 – present — 113 trading days, 40.7 MB compressed in total. A day typically holds 24 contract files (up to 24 on the busiest day, 1.74 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.
Supreme Court decisions — development since capture
471 trades and $12.5K of USD turnover over 51 captured days since 2026-09-22 — record day 2026-10-06 with $942.18, biggest single contract KXSCOTUSCASE-SUNCOM26 (2026-10-06, $731.41).
| Month | Days | Trades | Turnover (USD) | Avg / day | Contracts traded | L2 updates | vs previous month |
|---|---|---|---|---|---|---|---|
| Nov 2026 (month to date) | 11 | 121 | $4.1K | $369.7 | 42 | 122.1K | — |
| Oct 2026 | 31 | 332 | $7.9K | $255.4 | 78 | 546.3K | +1518.0 % |
| Sep 2026 | 9 | 18 | $489.34 | $54.37 | 11 | 50.4K | — |
Kalshi Supreme Court decisions — 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.
Supreme Court decisions — activity by weekday
Tuesdays carry the most turnover, about $496.19 per day.
| Weekday (UTC) | Avg turnover / day | USD | Avg trades | Days |
|---|---|---|---|---|
| Monday | $358.11 | 12 | 4 | |
| Tuesday | $496.19 | 16.6 | 5 | |
| Wednesday | $182.89 | 7.6 | 5 | |
| Thursday | $266.57 | 10.5 | 4 | |
| Friday | $278.57 | 4 | 4 | |
| Saturday | $143.05 | 5 | 4 | |
| Sunday | $39.65 | 2.5 | 4 |
Kalshi Supreme Court decisions — 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 —.
Supreme Court decisions — 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-11-11 | 24 | 512 KB | 2 | 7 | $22.76 | 4 % | 4.55 ¢ | $21.21 | 15.1K | Buy day → | |
| 2026-11-10 | 24 | 394 KB | 4 | 20 | $667.14 | 29 % | 5.49 ¢ | $56.95 | 10.4K | Buy day → | |
| 2026-11-09 | 24 | 391 KB | 8 | 19 | $603.61 | 73 % | 8.12 ¢ | $65.47 | 10.8K | Buy day → | |
| 2026-11-08 | 24 | 293 KB | 0 | 0 | $0 | — | — | — | 7.5K | Buy day → | |
| 2026-11-07 | 24 | 323 KB | 5 | 7 | $302.73 | 41 % | 8.55 ¢ | $82.58 | 8.6K | Buy day → | |
| 2026-11-06 | 24 | 584 KB | 5 | 11 | $907.41 | 99 % | 18.7 ¢ | $61.11 | 17.3K | Buy day → | |
| 2026-11-05 | 24 | 396 KB | 4 | 22 | $437.76 | 73 % | 7.45 ¢ | $57.03 | 10.3K | Buy day → | |
| 2026-11-04 | 24 | 261 KB | 5 | 7 | $282.18 | 100 % | 9.85 ¢ | $70.43 | 5.5K | Buy day → | |
| 2026-11-03 | 24 | 335 KB | 5 | 17 | $390.96 | 72 % | 8.63 ¢ | $61.62 | 8.6K | Buy day → | |
| 2026-11-02 | 24 | 485 KB | 4 | 11 | $452.13 | 99 % | 19.9 ¢ | $41.8 | 14.3K | Buy day → | |
| 2026-11-01 | 24 | 470 KB | 0 | 0 | $0 | — | — | — | 13.7K | Buy day → | |
| 2026-10-31 | 24 | 393 KB | 1 | 5 | $152.84 | 10 % | 2.33 ¢ | $53.87 | 11.5K | Buy day → | |
| 2026-10-30 | 24 | 614 KB | 1 | 1 | $43.35 | 0 % | 5.63 ¢ | $124.87 | 18.8K | Buy day → | |
| 2026-10-29 | 24 | 638 KB | 0 | 0 | $0 | — | — | — | 20.4K | Buy day → | |
| 2026-10-28 | 24 | 569 KB | 1 | 1 | $0.48 | 100 % | 8.25 ¢ | $6.89 | 18.1K | Buy day → | |
| 2026-10-27 | 24 | 1.40 MB | 3 | 12 | $747.26 | 97 % | 15.2 ¢ | $29.4 | 52.6K | Buy day → | |
| 2026-10-26 | 24 | 332 KB | 2 | 6 | $17.18 | 58 % | 5.51 ¢ | $61.61 | 7.8K | Buy day → | |
| 2026-10-25 | 24 | 248 KB | 2 | 2 | $3 | 98 % | 9.59 ¢ | $110.52 | 5.5K | Buy day → | |
| 2026-10-24 | 24 | 258 KB | 2 | 4 | $92.35 | 0 % | 7.72 ¢ | $61.59 | 6.1K | Buy day → | |
| 2026-10-23 | 24 | 310 KB | 2 | 3 | $148.71 | 0 % | 47.2 ¢ | $7.63 | 7.6K | Buy day → | |
| 2026-10-22 | 24 | 330 KB | 3 | 10 | $52.12 | 10 % | 5.39 ¢ | $80.56 | 8.2K | Buy day → | |
| 2026-10-21 | 24 | 519 KB | 1 | 5 | $15.6 | 0 % | 15.4 ¢ | $48.32 | 15.5K | Buy day → | |
| 2026-10-20 | 24 | 366 KB | 4 | 21 | $322.53 | 91 % | 5.88 ¢ | $27.83 | 10.3K | Buy day → | |
| 2026-10-19 | 24 | 341 KB | 5 | 12 | $359.53 | 2 % | 41.4 ¢ | $29.33 | 8.6K | Buy day → | |
| 2026-10-18 | 24 | 294 KB | 3 | 8 | $155.6 | 0 % | 6.77 ¢ | $11.83 | 6.9K | Buy day → | |
| 2026-10-17 | 24 | 268 KB | 2 | 4 | $24.29 | 100 % | 5.47 ¢ | $64.54 | 6.3K | Buy day → | |
| 2026-10-16 | 24 | 458 KB | 1 | 1 | $14.81 | 100 % | 3.90 ¢ | $77.21 | 13.8K | Buy day → | |
| 2026-10-15 | 24 | 1.17 MB | 4 | 10 | $576.39 | 66 % | 21.2 ¢ | $54.54 | 45.3K | Buy day → | |
| 2026-10-14 | 24 | 655 KB | 3 | 18 | $593.42 | 74 % | 45.1 ¢ | $24.03 | 21.4K | Buy day → | |
| 2026-10-13 | 24 | 314 KB | 4 | 13 | $353.05 | 62 % | 6.47 ¢ | $89.19 | 7.5K | 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 Supreme Court decisions 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 Supreme Court decisions contracts on 2026-11-11 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 2 still open at the last print: 7 trades, $22.76 USD turnover. The busiest contract was KXSCOTUSCASE-DHSDVD28 with $20.51 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXSCOTUSCASE-DHSDVD28 | 0.690 | 0.740 | 0.670 | 0.670 | 0.680 | open | 4 | $20.51 | 2 % | 4.54 ¢ | $22.76 | 611 | buy file → |
| KXSCOTUSCASE-DOLSUN28 | 0.150 | 0.150 | 0.090 | 0.090 | 0.090 | open | 3 | $2.25 | 24 % | 4.70 ¢ | $6.99 | 6.6K | 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).
2026-11-10 — 4 contracts, 20 trades, $667.14 turnover
The 4 most traded Supreme Court decisions contracts on 2026-11-10 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 4 still open at the last print: 20 trades, $667.14 USD turnover. The busiest contract was KXSCOTUSCASE-DHSDVD28 with $493.01 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXSCOTUSCASE-DHSDVD28 | 0.760 | 0.760 | 0.140 | 0.690 | 0.483 | open | 11 | $493.01 | 30 % | 5.16 ¢ | $63.66 | 666 | buy file → |
| KXSCOTUSCASE-INTFER28 | 0.840 | 0.850 | 0.830 | 0.830 | 0.831 | open | 4 | $99.71 | 0 % | 7.80 ¢ | $54.21 | 330 | buy file → |
| KXSCOTUSCASE-DOLSUN28 | 0.150 | 0.150 | 0.140 | 0.150 | 0.150 | open | 3 | $44.15 | 32 % | 2.17 ¢ | $12.74 | 264 | buy file → |
| KXSCOTUSCASE-WASBLA28 | 0.250 | 0.310 | 0.250 | 0.310 | 0.308 | open | 2 | $30.27 | 100 % | 8.13 ¢ | $21.17 | 516 | buy file → |
2026-11-09 — 8 contracts, 19 trades, $603.61 turnover
The 8 most traded Supreme Court decisions contracts on 2026-11-09 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 8 still open at the last print: 19 trades, $603.61 USD turnover. The busiest contract was KXSCOTUSCASE-SALPAR28 with $179.05 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXSCOTUSCASE-SALPAR28 | 0.600 | 0.670 | 0.590 | 0.670 | 0.651 | open | 6 | $179.05 | 82 % | 5.77 ¢ | $36.6 | 746 | buy file → |
| KXSCOTUSCASE-NIEWAT28 | 0.790 | 0.800 | 0.790 | 0.800 | 0.800 | open | 1 | $160 | 100 % | 7.24 ¢ | $81.63 | 232 | buy file → |
| KXSCOTUSCASE-STMROY28 | 0.870 | 0.880 | 0.870 | 0.880 | 0.880 | open | 1 | $99.16 | 100 % | 4.57 ¢ | $92.19 | 1.6K | buy file → |
| KXSCOTUSCASE-HOFWBI28 | 0.380 | 0.380 | 0.070 | 0.070 | 0.280 | open | 5 | $75.33 | 0 % | 20.2 ¢ | $37.53 | 428 | buy file → |
| KXSCOTUSCASE-INTFER28 | 0.850 | 0.850 | 0.840 | 0.840 | 0.847 | open | 2 | $50.8 | 0 % | 8.95 ¢ | $96.61 | 204 | buy file → |
| KXSCOTUSCASE-JOUALA28 | 0.850 | 0.850 | 0.850 | 0.850 | 0.850 | open | 1 | $27.13 | 100 % | 8.60 ¢ | $82.05 | 236 | buy file → |
| KXSCOTUSCASE-DHSDVD28 | 0.750 | 0.760 | 0.750 | 0.760 | 0.760 | open | 1 | $9.84 | 100 % | 4.06 ¢ | $78.15 | 314 | buy file → |
| KXSCOTUSCASE-DOLSUN28 | 0.160 | 0.160 | 0.150 | 0.150 | 0.153 | open | 2 | $2.3 | 0 % | 2.45 ¢ | $13.37 | 227 | buy file → |
2026-11-07 — 5 contracts, 7 trades, $302.73 turnover
The 5 most traded Supreme Court decisions contracts on 2026-11-07 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 5 still open at the last print: 7 trades, $302.73 USD turnover. The busiest contract was KXSCOTUSCASE-HOFWBI28 with $139.55 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXSCOTUSCASE-HOFWBI28 | 0.450 | 0.450 | 0.380 | 0.380 | 0.422 | open | 2 | $139.55 | 0 % | 9.58 ¢ | $79.5 | 439 | buy file → |
| KXSCOTUSCASE-NIEWAT28 | 0.790 | 0.790 | 0.790 | 0.790 | 0.790 | open | 1 | $98.55 | 100 % | 7.80 ¢ | $111.49 | 174 | buy file → |
| KXSCOTUSCASE-BEAUSA28 | 0.270 | 0.270 | 0.260 | 0.260 | 0.260 | open | 1 | $36.11 | 0 % | 8.01 ¢ | $19.88 | 183 | buy file → |
| KXSCOTUSCASE-STMROY28 | 0.830 | 0.870 | 0.830 | 0.870 | 0.868 | open | 2 | $24.77 | 100 % | 6.45 ¢ | $85.64 | 750 | buy file → |
| KXSCOTUSCASE-JOHUSA28 | 0.240 | 0.240 | 0.150 | 0.150 | 0.150 | open | 1 | $3.75 | 0 % | 8.86 ¢ | $20.58 | 234 | buy file → |
2026-11-06 — 5 contracts, 11 trades, $907.41 turnover
The 5 most traded Supreme Court decisions contracts on 2026-11-06 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 5 still open at the last print: 11 trades, $907.41 USD turnover. The busiest contract was KXSCOTUSCASE-STMROY28 with $501.66 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXSCOTUSCASE-STMROY28 | 0.750 | 0.910 | 0.740 | 0.830 | 0.830 | open | 6 | $501.66 | 100 % | 7.62 ¢ | $21.31 | 535 | buy file → |
| KXSCOTUSCASE-MAXTHO28 | 0.780 | 0.820 | 0.780 | 0.820 | 0.806 | open | 2 | $237.9 | 100 % | 32.1 ¢ | $127.89 | 206 | buy file → |
| KXSCOTUSCASE-GUEJON28 | 0.730 | 0.800 | 0.730 | 0.800 | 0.800 | open | 1 | $160 | 100 % | 34.2 ¢ | $85.4 | 431 | buy file → |
| KXSCOTUSCASE-SALPAR28 | 0.600 | 0.600 | 0.600 | 0.600 | 0.600 | open | 1 | $7.19 | 0 % | 9.21 ¢ | $85.54 | 462 | buy file → |
| KXSCOTUSCASE-DHSDVD28 | 0.750 | 0.750 | 0.750 | 0.750 | 0.750 | open | 1 | $0.66 | 100 % | 5.65 ¢ | $81.99 | 297 | buy file → |
2026-11-05 — 4 contracts, 22 trades, $437.76 turnover
The 4 most traded Supreme Court decisions contracts on 2026-11-05 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 4 still open at the last print: 22 trades, $437.76 USD turnover. The busiest contract was KXSCOTUSCASE-SUNCOM26 with $234.39 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXSCOTUSCASE-SUNCOM26 | 0.530 | 0.650 | 0.530 | 0.650 | 0.606 | open | 11 | $234.39 | 100 % | 5.20 ¢ | $44.36 | 4.5K | buy file → |
| KXSCOTUSCASE-STMROY28 | 0.820 | 0.820 | 0.690 | 0.750 | 0.711 | open | 6 | $127.34 | 8 % | 11.8 ¢ | $69.33 | 428 | buy file → |
| KXSCOTUSCASE-YOUFUL28 | 0.870 | 0.870 | 0.790 | 0.790 | 0.790 | open | 1 | $41.56 | 100 % | 6.84 ¢ | $85.21 | 324 | buy file → |
| KXSCOTUSCASE-NIEWAT28 | 0.790 | 0.790 | 0.780 | 0.790 | 0.788 | open | 4 | $34.47 | 100 % | 7.53 ¢ | $63.83 | 210 | buy file → |
2026-11-04 — 5 contracts, 7 trades, $282.18 turnover
The 5 most traded Supreme Court decisions contracts on 2026-11-04 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 5 still open at the last print: 7 trades, $282.18 USD turnover. The busiest contract was KXSCOTUSCASE-GUEJON28 with $146 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXSCOTUSCASE-GUEJON28 | 0.730 | 0.730 | 0.730 | 0.730 | 0.730 | open | 1 | $146 | 100 % | 8.98 ¢ | $72.67 | 260 | buy file → |
| KXSCOTUSCASE-MAXTHO28 | 0.720 | 0.780 | 0.720 | 0.780 | 0.753 | open | 2 | $113 | 100 % | 11.4 ¢ | $74.14 | 308 | buy file → |
| KXSCOTUSCASE-APPEPI28 | 0.720 | 0.800 | 0.720 | 0.800 | 0.797 | open | 2 | $14.79 | 100 % | 7.05 ¢ | $11.98 | 230 | buy file → |
| KXSCOTUSCASE-STMROY28 | 0.820 | 0.820 | 0.820 | 0.820 | 0.820 | open | 1 | $8.2 | 100 % | 9.04 ¢ | $86.36 | 209 | buy file → |
| KXSCOTUSCASE-BEAUSA28 | 0.330 | 0.330 | 0.270 | 0.270 | 0.270 | open | 1 | $0.19 | 0 % | 8.04 ¢ | $7.01 | 225 | buy file → |
How a Supreme Court decisions contract trades
On Kalshi, a Supreme Court decisions contract trades until its event settles, is listed roughly 4.6 h before it opens, and quotes in 1 ¢ price steps (0..1). Measured on the 2 contracts captured on 2026-11-11.
Try a Supreme Court decisions 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.
KXSCOTUSCASE-YOUFUL28 minute by minute — 2026-11-02
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.
KXSCOTUSCASE-YOUFUL28 traded in 2 of the day’s minutes (16:38–16:48 UTC): 5 trades, $311.58 turnover, opening at 0.610, ranging 0.610–0.680 and closing at 0.680.
| Minute (UTC) | Open | High | Low | Close | Trades | Turnover | Spread | Top-1 bid / ask |
|---|---|---|---|---|---|---|---|---|
| 16:38 | 0.610 | 0.610 | 0.610 | 0.610 | 1 | $122 | 13.1 ¢ | $54.62 / $105.99 |
| 16:48 | 0.610 | 0.680 | 0.670 | 0.680 | 4 | $189.58 | 23.9 ¢ | $13.56 / $44.7 |
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.
Build a Supreme Court decisions model on this data
Every resolved Supreme Court decisions contract is a labelled example that trades for weeks or months, not minutes: the label is the race outcome, the margin bucket or the nominee, and the signal in between is mostly the order book — quotes move on news while trades stay sparse. The day bundle holds each contract's full Level-2 book path and every trade of that UTC day, nanosecond-stamped; the statistics on this page cover the most traded contracts per day; the bundle holds every contract listed on Kalshi that day.
Split by election cycle and by race, never at random — months of quotes on one contract are one regime, and a random split leaks the result backwards; validate across races and cycles, not within one. The election-markets guide works thin books, book updates as the main signal and calibration over months 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 Supreme Court decisions 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 free full-day samples from the major venues let you test 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 Supreme Court decisions data — FAQ
What Kalshi Supreme Court decisions data can I download?
Tick-by-tick trades and Level-2 order-book depth for every contract of the Supreme Court decisions series on Kalshi (24 contract files on the latest day). One bundle = one UTC day of the whole series.
What is the Kalshi series ticker for Supreme Court decisions?
KXSCOTUSCASE — 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 KXSCOTUSCASE-* contract listed that UTC day.
How far back does the Supreme Court decisions data go?
Coverage runs July 2026 – present — 113 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 Supreme Court decisions 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 Supreme Court decisions 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 Supreme Court decisions 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 Supreme Court decisions 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 Supreme Court decisions contracts trade per day on Kalshi?
On average 3 Supreme Court decisions contracts had at least one trade per UTC day over the last 30 captured days on Kalshi, with about 13.8K order-book level updates recorded per day. A day bundle contains every contract file of the series for that day.
How liquid are Kalshi Supreme Court decisions contracts?
Over the last 30 captured days, the turnover-weighted quoted bid-ask spread was 16.3 ¢ (contracts quote 0..1 = 100 ¢), the mean best-bid/best-ask notional was about $51.21 per side, 66 % 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 Supreme Court decisions contract on 2026-11-11?
KXSCOTUSCASE-DHSDVD28 — $20.51 USD turnover over 4 trades on Kalshi. The 2 most traded contracts of the series did 7 trades and $22.76 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 Supreme Court decisions trading day on Kalshi?
2026-10-06, with $942.18 of USD turnover over 51 trades across every Supreme Court decisions contract of the day; the busiest full month was Oct 2026 at $7.9K. Since our statistics began on 2026-09-22 the series has recorded 471 trades and $12.5K over 51 captured days; the single biggest contract was KXSCOTUSCASE-SUNCOM26 on 2026-10-06 with $731.41. Any of these days is a downloadable bundle.
Which weekday does Kalshi Supreme Court decisions trade most?
Tuesdays — about $496.19 of USD turnover per Tuesday and 32 % of the series' turnover over the 30 captured days to 2026-11-11 on Kalshi, summed from every trade print of the series' contracts. The weekday profile on this page shows all seven days; the day bundles carry the full tape behind them.