what is a s and p ptp index participation rate

The closing price for the S&P 500 (GSPC) yesterday was $6,279.35. It was up 0.5% for the day (up 0.8% from previous close).

DATE OPEN HIGH LOW CLOSE VOLUME
July 03 2025 17:00
$6,277.60
$6,279.36
$6,277.60
$6,279.35
282,910,000
July 03 2025 16:30
$6,279.16
$6,284.65
$6,271.35
$6,277.76
308,463,000
July 03 2025 15:30
$6,276.49
$6,282.80
$6,276.09
$6,279.15
296,331,885
July 03 2025 14:30
$6,272.03
$6,279.69
$6,270.13
$6,276.59
362,901,720
July 03 2025 13:30
$6,246.46
$6,272.85
$6,246.46
$6,271.87
499,727,539
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.