NYA historical data
NYA is a Polymarket indices series with markets recurring daily. Marketlens has captured 111 markets since March 2, 2026, of which 110 resolved, with $61.6K in traded volume. 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.
Data as of 2026-08-16 · series slug nya
Resolution outcomes
Outcomes across 110 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 111 markets.
NYA (NYA) Up or Down on August 14?
closed 2026-08-14 · resolved Up
NYA (NYA) Up or Down on August 13?
closed 2026-08-13 · resolved Up
NYA (NYA) Up or Down on August 12?
closed 2026-08-12 · resolved Up
Backtest this series
from marketlens import MarketLens
client = MarketLens()
result = client.backtest(
MyStrategy(), "nya",
after="2026-08-07", before="2026-08-15", initial_cash=1_000,
)
result.show() # inspect the run in the dashboardAvailable datasets
Common questions
How many NYA markets are in the archive?
111 markets from March 2, 2026 through August 14, 2026, of which 110 have resolved and 1 are active.
What data exists for each NYA 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 "nya" through the API and Python SDK, or downloadable as Parquet.
How often do NYA markets resolve Up?
Of 110 resolved markets with a recorded outcome, 63 resolved Up (57.3%) and 47 resolved Down.
How much does a typical NYA market trade?
Average traded volume is $1.5K per market, $61.6K across the series.
Can I backtest strategies on NYA?
Yes. Pass the slug "nya" 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: SPX Open Daily Up or Down, SPX Daily Up or Down, Russell 2000 Daily Up or Down, Dow Jones Daily Up or Down, NDX Daily Up or Down, Hang Seng Daily Up or Down, or all indices series.
Try it
Replay NYA tick by tick
The free tier includes 5M rows per day with full API and full archive access, no card required.
$ pip install marketlens