S&P 500
SPXUnited StatesFive hundred large companies listed on US exchanges, weighted by free-float market value. The default proxy for US equities.
Price history
Last closeReturn by period
Risk
Trailing yearPosition in range
Trailing year82%
of the way from the year’s low to its high.
Historical context
251 sessions- Volatility21.9%
100th percentile of the last 231 readings — unusually high. Annualised from the last twenty sessions, then ranked against the same calculation on every twenty-session window of the past year.
- Latest session+2.35%
98th percentile of the last 250 readings — unusually high. Ranked on size and not direction, so an unusually large fall reads as unusual rather than as a low return.
- Five sessions+0.11%
50th percentile of the last 246 readings — typical. Ranked among every five-session change of the past year, direction included.
- Twenty sessions-3.30%
7th percentile of the last 231 readings — low. Ranked among every twenty-session change of the past year, direction included.
A percentile is the share of the past year’s readings at or below the current one. The multi-session rows keep direction, so a high rank there means a strong rise; volatility and the latest session are ranked on size alone, so a high rank means a large move either way. All of it describes how ordinary today is by this instrument’s own standards, which is a statement about the record and not about what happens next.
Reported context
UnavailableNo summary right now. The underlying figures above are unaffected.
What these figures mean
WritingOther equity indexs
Figures are calculated from closing prices and exclude dividends, coupons and the cost of rolling futures contracts. Volatility is annualised using 252 trading days. Past movement describes what happened and implies nothing about what happens next.

