SPY Opens Up or DownPolymarket historical data and price history
SPY Opens Up or Down: a Polymarket equities series with markets recurring daily. Marketlens has captured 64 markets since August 2, 2026, of which 66 resolved, with $140.7K in traded volume. Before that, 2 markets from July 22, 2026 to July 24, 2026 predate continuous coverage and are the only data before it. 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 SPY Open Daily Up or Down · slug spy-open-daily-up-or-down
Before that, 2 markets from July 22, 2026 to July 24, 2026 predate continuous coverage and are the only data before it.
Resolution outcomes
Outcomes across 66 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 67 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(), "spy-open-daily-up-or-down",
after=end - timedelta(hours=1), before=end, initial_cash=1_000,
)
result.show() # inspect the run in the dashboardAvailable datasets
Common questions
How many SPY Opens Up or Down markets are in the archive?
64 markets from August 2, 2026 through now, of which 66 have resolved and 1 are active. Before that, 2 markets from July 22, 2026 to July 24, 2026 predate continuous coverage and are the only data before it.
What data exists for each SPY Opens Up or Down 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 "spy-open-daily-up-or-down" through the API and Python SDK, or downloadable as Parquet.
How often do SPY Opens Up or Down markets resolve Up?
Of 66 resolved markets with a recorded outcome, 37 resolved Up (56.1%) and 29 resolved Down.
How much does a typical SPY Opens Up or Down market trade?
Average traded volume is $2.5K per market, $140.7K across the series.
Can I backtest strategies on SPY Opens Up or Down?
Yes. Pass the slug "spy-open-daily-up-or-down" 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.
Related series: SPY (SPY) Up or Down, What will S&P 500 (SPY) hit (Weekly), What will NVIDIA (NVDA) hit, What will Meta Platforms, Inc. (META) hit (Monthly), What will Coinbase Global, Inc. (COIN) hit, What will Tesla, Inc. (TSLA) hit, or all equities series.
Try it
Replay SPY Opens Up or Down 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