polymarket_polygon.open_interest_hourly

The polymarket_polygon.open_interest_hourly table provides hourly open interest and traded volume per Polymarket market. Grain: one row per (hour, market_id), with a row for every hour from the hour the market’s outcome tokens were first minted to the hour it resolves. Open interest is a level at the end of the hour; volume is the flow within it. Open interest is the outcome token supply, rebuilt from the CTF ERC-1155 mint and burn ledger on Polygon. History starts in April 2021. It is counted per side. On a standalone market the Yes and No sides are equal. On a member of a mutually exclusive (neg-risk) event, they diverge once No tokens are converted: converting No tokens of one outcome mints Yes tokens of every sibling outcome without adding collateral, so the No side drops and the siblings’ Yes sides grow. event_oi_contracts gives the collateral locked behind the whole event. Every row is the state at the end of its hour. A decided market has no open interest, so the resolution hour reads zero and the series stops there, even though tokens are still held: losing tokens are never redeemed, and winners redeem over weeks. Redemptions are in polymarket_polygon.market_actions. A market that opens and resolves within one hour shows volume but no open interest.

Combos are not included. A combo’s collateral hangs on its legs, so it doesn’t add to single-market open interest.

Don’t sum market_oi_yes_contracts across the members of an event. Because conversions mint sibling Yes tokens without collateral, the sum can overstate the money at stake several times over. Don’t sum event_oi_contracts across members either, because it is repeated on every member row. For total open interest, take event_oi_contracts once per event and hour, grouping by COALESCE(event_id, market_id) so that each standalone market counts as its own event. The example below does this.

Volume is kept here rather than on the candles because summing the Yes and No candles double-counts every Yes-versus-No match. Per-token prices are in polymarket_polygon.ohlcv_hourly.

Table Schema

Column	Type	Description
`block_month`	`DATE`	First day of the UTC month of `hour`. Partition key
`hour`	`TIMESTAMP`	UTC hour the figures describe. Open interest is the level at the end of it, volume the flow within it
`market_id`	`VARCHAR`	Market condition ID. Joins `polymarket_polygon.market_details` on `condition_id` and `polymarket_polygon.ohlcv_hourly` on `market_id`
`event_id`	`VARCHAR`	Event this market is one outcome of, when the venue groups markets into a mutually exclusive set. NULL for a standalone market
`market_oi_yes_contracts`	`DOUBLE`	Yes tokens outstanding at the end of the hour. Zero in the hour the market resolves
`market_oi_no_contracts`	`DOUBLE`	No tokens outstanding at the end of the hour. Equal to the Yes side on a standalone market. Lower on an event member whose No tokens have been converted into Yes tokens of sibling outcomes. Zero in the hour the market resolves
`event_oi_contracts`	`DOUBLE`	Open contracts across the undecided members of the market’s event at the end of the hour: the Yes tokens of one member plus the No tokens of every other member, which is the payout whichever outcome wins. A member that resolves early drops out of the sum from its resolution hour. Equal to the Yes side on a standalone market. One contract pays 1 unit of the quote stablecoin
`volume_contracts`	`DOUBLE`	Outcome tokens traded in the hour, both sides together, each match counted once
`volume_usd`	`DOUBLE`	Cash traded in the hour in the quote stablecoin, each match counted once from the aggressor’s side
`trade_count`	`BIGINT`	Matches in the hour, both sides together
`_updated_at`	`TIMESTAMP`	When this row was last written by the pipeline

Table sample

Query performance

block_month is the partition key. Always include a block_month or hour filter.

Example query

-- Total open interest at the end of each UTC day, last 30 days.
-- event_oi_contracts repeats on every market of an event, so take it once per event.
-- A market without an event_id is its own event.
WITH per_event AS (
  SELECT
    CAST(hour AS DATE) AS day,
    COALESCE(event_id, market_id) AS event_key,
    MAX(event_oi_contracts) AS open_interest_contracts
  FROM polymarket_polygon.open_interest_hourly
  WHERE block_month >= DATE_TRUNC('month', CURRENT_DATE - INTERVAL '30' DAY)
    AND hour >= CURRENT_DATE - INTERVAL '30' DAY
    AND HOUR(hour) = 23 -- the 23:00 row is the level at the end of the day
  GROUP BY 1, 2
)
SELECT
  day,
  SUM(open_interest_contracts) AS open_interest_contracts
FROM per_event
GROUP BY 1
ORDER BY 1

Curated Data

Solana

Hyperliquid

Non-EVM Networks

Protocols

EVM Networks

Partner Data

Dune Index

polymarket_polygon.open_interest_hourly

Table Schema

Table sample

Query performance

Example query

​Table Schema

​Table sample

​Query performance

​Example query

Table Schema

Table sample

Query performance

Example query