The S&P 500 closed at 7,650.50 on September 18, 2026, up 0.17% that session but little changed week-over-week, within a recent range near the upper end of its 52-week span of 6,317–7,817. The primary near-term driver remains the Federal Reserve’s September 15–16 decision to raise the federal funds target range 25 basis points to 3.75–4.00%, with market-implied odds of an additional October hike hovering near 58%. Elevated 10-year Treasury yields near 5%, persistent oil prices, and a light but data-heavy week featuring flash PMIs, jobless claims, new-home sales, durable-goods orders, and consumer-sentiment readings will shape sentiment. Corporate earnings from Costco and AutoZone, plus the September 24 Trump-Xi summit on trade and tariffs, add further variables to equity flows and risk appetite.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated↑ $795
2%
↑ $790
4%
↑ $785
5%
↑ $780
12%
↑ $775
33%
↑ $770
62%
↑ $765
93%
↓ $760
61%
↓ $755
37%
↓ $750
20%
↓ $745
11%
↓ $740
7%
↓ $735
6%
↓ $730
1%
$5,276 Vol.
↑ $795
2%
↑ $790
4%
↑ $785
5%
↑ $780
12%
↑ $775
33%
↑ $770
62%
↑ $765
93%
↓ $760
61%
↓ $755
37%
↓ $750
20%
↓ $745
11%
↓ $740
7%
↓ $735
6%
↓ $730
1%
Only prices achieved during the regular trading hours of the primary exchange on which the listed security trades (typically 9:30 AM – 4:00 PM ET) will be considered. Prices occurring during pre-market or after-hours trading will not qualify.
Prices will be used exactly as published by Pyth, without rounding.
In the event of a stock split, reverse stock split, or similar corporate action affecting the listed company during the listed time frame, this market will resolve based on split-adjusted prices as displayed on Pyth.
The target price will be adjusted proportionally to reflect any stock splits. Resolution will be based on the historical price data as shown on Pyth after any adjustments have been applied.
The resolution source for this market is Pyth — specifically, the S&P 500 (SPY) "High" and "Low" prices available at https://pythdata.app/explore/Equity.US.SPY%2FUSD, with the chart settings configured for 1-minute candles.
Historical 1-minute candles may be accessed by appending a Unix timestamp (seconds) to the Pyth chart URL using the "t=" parameter. Any timestamp within the listed market time frame may be used to view the relevant candle data (e.g., https://pythdata.app/explore/Equity.US.SPY%2FUSD?t=1773432000)
If the relevant Pyth data is unavailable due to a system outage, data failure, or other technical disruption that prevents verification of the required 1-minute candle data, the official daily high/low price published by the primary exchange on which the listed security trades will be used to determine whether the listed price was reached during the applicable trading session.
Market Opened: Sep 18, 2026, 6:01 PM ET
Resolution Source
https://pythdata.app/explore/Equity.US.SPY%2FUSDResolver
0x65070BE91...Only prices achieved during the regular trading hours of the primary exchange on which the listed security trades (typically 9:30 AM – 4:00 PM ET) will be considered. Prices occurring during pre-market or after-hours trading will not qualify.
Prices will be used exactly as published by Pyth, without rounding.
In the event of a stock split, reverse stock split, or similar corporate action affecting the listed company during the listed time frame, this market will resolve based on split-adjusted prices as displayed on Pyth.
The target price will be adjusted proportionally to reflect any stock splits. Resolution will be based on the historical price data as shown on Pyth after any adjustments have been applied.
The resolution source for this market is Pyth — specifically, the S&P 500 (SPY) "High" and "Low" prices available at https://pythdata.app/explore/Equity.US.SPY%2FUSD, with the chart settings configured for 1-minute candles.
Historical 1-minute candles may be accessed by appending a Unix timestamp (seconds) to the Pyth chart URL using the "t=" parameter. Any timestamp within the listed market time frame may be used to view the relevant candle data (e.g., https://pythdata.app/explore/Equity.US.SPY%2FUSD?t=1773432000)
If the relevant Pyth data is unavailable due to a system outage, data failure, or other technical disruption that prevents verification of the required 1-minute candle data, the official daily high/low price published by the primary exchange on which the listed security trades will be used to determine whether the listed price was reached during the applicable trading session.
Resolution Source
https://pythdata.app/explore/Equity.US.SPY%2FUSDResolver
0x65070BE91...The S&P 500 closed at 7,650.50 on September 18, 2026, up 0.17% that session but little changed week-over-week, within a recent range near the upper end of its 52-week span of 6,317–7,817. The primary near-term driver remains the Federal Reserve’s September 15–16 decision to raise the federal funds target range 25 basis points to 3.75–4.00%, with market-implied odds of an additional October hike hovering near 58%. Elevated 10-year Treasury yields near 5%, persistent oil prices, and a light but data-heavy week featuring flash PMIs, jobless claims, new-home sales, durable-goods orders, and consumer-sentiment readings will shape sentiment. Corporate earnings from Costco and AutoZone, plus the September 24 Trump-Xi summit on trade and tariffs, add further variables to equity flows and risk appetite.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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