SPX: RSI (14)

SPX6900 RSI (14) was 43.13 on 8 Nov 2026 (latest daily value).

The 14-period relative strength index of SPX: daily closes in the daily view, hourly closes in the hourly view.

Why use it. A common momentum gauge of how one-sided recent moves have been. How to read it. Below 30 is commonly read as oversold, above 70 as overbought; 50 is balanced.

Calculation. Wilder's RSI: the first value needs 15 adjacent closes; average gain and loss seed as the simple means of the first 14 changes, then update as (13 x the previous average + the new gain or loss) / 14; RSI = 100 - 100 / (1 + average gain / average loss), 50 when both are 0. A missing close restarts the sequence. The same numbers as the crypto RSI heatmap. The open day shows a labelled partial: one more step with the latest completed hour's close.