s and p 500 standard deviation

The closing price for the S&P 500 (GSPC) today was $6,801.79. It was down 0.9% for the day (down 2% from previous close).

DATEOPENHIGHLOWCLOSEVOLUME
January 20 2026 19:30
$6,803.45
$6,807.64
$6,796.80
$6,801.79
178,173,000
January 20 2026 18:30
$6,826.65
$6,827.15
$6,800.78
$6,803.44
323,905,000
January 20 2026 17:30
$6,847.68
$6,847.68
$6,826.36
$6,826.80
303,322,000
January 20 2026 16:30
$6,862.35
$6,866.70
$6,845.44
$6,847.58
349,561,000
January 20 2026 15:30
$6,862.01
$6,869.86
$6,849.66
$6,862.23
424,021,087
January 20 2026 14:30
$6,865.24
$6,865.24
$6,833.29
$6,862.06
661,196,034
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.