The S&P 500 finished Tuesday, September 15, 2026, at 7,585.73, down 34.25 points, or 0.45%, from Monday. The distinctive feature was not simply the negative close: even Tuesday’s high remained below the previous session’s finish.
September 15 cash-index close
| Measure | Index points |
|---|---|
| September 14 close | 7,619.98 |
| Open | 7,612.30 |
| High | 7,617.26 |
| Low | 7,572.69 |
| September 15 close | 7,585.73 |
| Daily change | -34.25 (-0.45%) |
The opening gap was 7.68 points, about 0.10%. Another 26.57 points separated the open from the close, accounting for roughly 78% of the full close-to-close loss. This arithmetic distinguishes the initial markdown from the additional deterioration recorded during the cash session; it does not identify the timing of individual selling waves.
The day’s 44.57-point range equaled about 0.58% of Monday’s closing level. Tuesday’s high fell 2.72 points short of that reference, while the final reading stood 13.04 points above the low. The finish was therefore in the bottom third of the range, despite avoiding the weakest level.
Compared with Monday’s 7,592.28 low, Tuesday’s trough was 19.59 points lower. The closing value also fell below that earlier low. These are observed comparisons, not a forecast that either level will act as future support or resistance.
S&P Dow Jones Indices describes this benchmark as covering 500 leading large U.S. companies and approximately 80% of available market capitalization. Its move is not a count of how many individual shares advanced or declined.
The Federal Reserve calendar lists a September 15–16 meeting with economic projections. The scheduled conclusion is a next-session event, not an outcome established by this close.
Figures are rounded from Yahoo Finance’s daily cash-index data, a quote aggregator; the official administrator link supplies the benchmark definition, not certification of this table.