Research dashboard
SPX weekday performance
Compare S&P 500 weekday returns across intraday and close-to-close methods using the local SPX market-data cache.
1Y · Open to close+11.65%Monday cumulative return
Weekday study
Monday leads this view
Summary
Total return by weekday
Monday+11.65% total · +0.23% avg
Cumulative
Weekday-return line chart
Monday · May 4, 2026+11.65% cumulative
MondayTuesdayWednesdayThursdayFriday
Monday+11.65%+0.23% avg · +70.83% wins · 48 daysBest +1.44% · Worst -0.93%
Tuesday+4.93%+0.09% avg · +54.72% wins · 53 daysBest +2.07% · Worst -1.00%
Wednesday+0.94%+0.02% avg · +50.94% wins · 53 daysBest +0.97% · Worst -1.20%
Thursday-7.87%-0.17% avg · +45.83% wins · 48 daysBest +1.08% · Worst -2.96%
Friday+0.19%+0.01% avg · +54.00% wins · 50 daysBest +1.70% · Worst -2.79%
Source freshness
Local cache covers Jan 4, 1993 through May 6, 2026 with 8,393 SPX daily rows.
Source fetched from Yahoo Finance SPX chart; latest row fetched May 7, 2026, 4:03 AM UTC; last refresh May 7, 2026, 4:03 AM UTC.