Opendoor (OPEN) closesPolymarket historical data and price history
Opendoor (OPEN) closes: a Polymarket equities series with markets recurring weekly. Marketlens has captured 341 markets since March 5, 2026, of which 341 resolved, with $317.6K in traded volume. No new markets were collected from July 20, 2026 to August 17, 2026, so windows inside that gap return nothing. Every market's order book is stored in full: periodic L2 snapshots plus every individual price change with a millisecond timestamp, alongside trades, candles, and the final resolution outcome.
For the equities archive as a whole, see Polymarket price history.
Data as of 2026-11-02 · Polymarket series OPEN Neg Risk Weekly · slug open-neg-risk-weekly
No new markets were collected from July 20, 2026 to August 17, 2026, so windows inside that gap return nothing.
Resolution outcomes
Outcomes across 341 resolved markets with a recorded winning outcome. Settlement in the archive is by winning outcome, not by final traded price.
Markets in this series
The most recently resolved of 352 markets.
Backtest this series
from datetime import datetime, timedelta, timezone
from marketlens import MarketLens, Strategy
class MyStrategy(Strategy):
def on_market_start(self, ctx, market, book):
ctx.buy_yes(size=10)
client = MarketLens()
end = datetime.now(timezone.utc) - timedelta(days=1)
result = client.backtest(
MyStrategy(), "open-neg-risk-weekly",
after=end - timedelta(hours=1), before=end, initial_cash=1_000,
)
result.show() # inspect the run in the dashboardAvailable datasets
Common questions
How many Opendoor (OPEN) closes markets are in the archive?
341 markets from March 5, 2026 through now, of which 341 have resolved and 11 are active. No new markets were collected from July 20, 2026 to August 17, 2026, so windows inside that gap return nothing.
What data exists for each Opendoor (OPEN) closes market?
Full L2 order book history (snapshots plus every price change at millisecond resolution), individual trades, OHLC candles, and the resolution outcome. All of it is queryable by the series slug "open-neg-risk-weekly" through the API and Python SDK, or downloadable as Parquet.
How often do Opendoor (OPEN) closes markets resolve No?
Of 341 resolved markets with a recorded outcome, 309 resolved No (90.6%) and 32 resolved Yes.
How much does a typical Opendoor (OPEN) closes market trade?
Average traded volume is $1.0K per market, $317.6K across the series.
Can I backtest strategies on Opendoor (OPEN) closes?
Yes. Pass the slug "open-neg-risk-weekly" to client.backtest() in the Python SDK. Execution mode replays every market's order book tick by tick and fills simulated orders against real historical depth with queue priority, latency, and fee modelling; Alpha mode replays one bar per market for slower signals over long windows.
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Try it
Replay Opendoor (OPEN) closes tick by tick
The free tier includes 2M data rows and every market open in the last 7 days, no card required.
$ pip install marketlens