---
title: "S&P 500 (SPX) Opens Up or Down on October 2?"
canonical_url: https://betcrypto.now/events/sp-500-spx-opens-up-or-down-on-october-2
status: settled
trading_closes_at: 2026-10-02T20:00:00+00:00
settled_at: 2026-10-02T22:29:56+00:00
total_volume_usd: 22266.27
venues: ["Polymarket"]
categories: []
prices_as_of: 2026-10-09T09:07:31+00:00
publisher: BetCrypto
data_api: https://betcrypto.now/api/v1/events/sp-500-spx-opens-up-or-down-on-october-2
---

# S&P 500 (SPX) Opens Up or Down on October 2?

Settled · $22,266 traded · listed on Polymarket

## Result

**Up** won. Settled 2026-10-02.

## About

This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on October 2 is higher than the official S&P 500 Index closing price for SPX on the most recent prior trading day.

This market will resolve to "Down" if the official S&P 500 Index open price for S&P 500 (SPX) on October 2 is lower than the official S&P 500 Index closing price for SPX on the most recent prior trading day.

E.g., ordinarily, a market on Monday would refer to the previous Friday for its most recent closing price, unless that Friday were a market holiday, in which case it would refer to Thursday, or the next most recent trading day.

If the two prices are exactly equal, this market will resolve 50-50. Note that all figures will be rounded to the nearest cent using standard rounding.

If SPX does not trade at all during the regular session, the market will resolve 50-50.

If either of the relevant days are shortened (for example, due to a market holiday schedule), the official open/close price published by S&P 500 Index for that shortened session will still be used for resolution.

If the previous trading day has no official closing price (for example, due to a trading halt into the market close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price.

The resolution source for this market is the Wall Street Journal, specifically the Open/Close values published by the WSJ under "Historical Prices".

US: https://www.wsj.com/market-data/stocks
EMEA: https://www.wsj.com/market-data/stocks/emea
ASIA: https://www.wsj.com/market-data/stocks/asia

_From Polymarket's listing._

## Open on a venue

- [Polymarket](https://betcrypto.now/go/e/678620?via=md)

---

Probability is the cross-venue consensus (book midpoints, 0–100%). Venue columns are what buying costs there (the ask). Prices move constantly; re-check at the canonical URL or https://betcrypto.now/api/v1/events/sp-500-spx-opens-up-or-down-on-october-2.

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