Last 59 trading days. "Overnight" = today's Open vs the PRIOR day's Close
(the same move plotted as the pink dotted line on the chart) — each day's own Open→Close
move is not counted here. Overnight $/% is what you'd have earned holding only from close
to next open; Cum. Index is the running compounded value shown on the chart's pink line.
Date
Open
High
Low
Close
Prior Close
Overnight $
Overnight %
Cum. Index
2026-06-09
$122.21
$124.00
$108.30
$117.00
$120.90
+1.31
+1.08%
$122.21
2026-06-16
$125.35
$127.84
$118.05
$118.25
$117.00
+8.35
+7.14%
$130.93
2026-06-17
$120.24
$121.31
$112.80
$112.92
$118.25
+1.99
+1.68%
$133.14
2026-06-18
$117.89
$122.18
$117.58
$121.62
$112.92
+4.97
+4.40%
$139.00
2026-06-22
$125.58
$132.42
$125.19
$131.55
$121.62
+3.96
+3.26%
$143.52
2026-06-23
$123.23
$124.05
$116.27
$117.06
$131.55
-8.32
-6.32%
$134.45
2026-06-25
$121.00
$121.25
$112.16
$118.74
$117.06
+3.94
+3.37%
$138.97
2026-06-26
$98.08
$98.30
$89.24
$90.65
$118.74
-20.66
-17.40%
$114.80
2026-06-29
$90.19
$90.91
$86.47
$88.57
$90.65
-0.46
-0.50%
$114.22
2026-06-30
$88.77
$95.35
$88.72
$94.54
$88.57
+0.20
+0.23%
$114.48
2026-07-01
$92.02
$96.82
$91.67
$94.63
$94.54
-2.52
-2.67%
$111.43
2026-07-02
$94.25
$98.20
$89.25
$91.22
$94.63
-0.38
-0.40%
$110.98
2026-07-07
$90.16
$92.05
$87.96
$91.10
$91.22
-1.06
-1.16%
$109.69
2026-07-08
$90.61
$94.17
$89.54
$93.79
$91.10
-0.49
-0.54%
$109.10
2026-07-09
$98.00
$102.64
$97.68
$97.87
$93.79
+4.21
+4.49%
$114.00
2026-07-10
$96.32
$96.80
$94.32
$95.96
$97.87
-1.55
-1.59%
$112.19
2026-07-13
$92.99
$92.99
$90.09
$90.37
$95.96
-2.97
-3.10%
$108.72
2026-07-14
$95.44
$95.49
$91.82
$93.73
$90.37
+5.07
+5.61%
$114.82
2026-07-15
$94.56
$94.88
$90.45
$92.54
$93.73
+0.83
+0.89%
$115.84
2026-07-16
$88.94
$90.17
$86.55
$88.12
$92.54
-3.60
-3.88%
$111.34
2026-07-17
$84.42
$90.00
$83.35
$87.37
$88.12
-3.70
-4.20%
$106.66
2026-07-21
$91.05
$91.59
$88.43
$91.06
$87.37
+3.68
+4.21%
$111.16
2026-07-22
$89.90
$94.25
$89.31
$92.33
$91.06
-1.16
-1.27%
$109.74
2026-07-23
$88.86
$91.02
$87.70
$90.13
$92.33
-3.47
-3.76%
$105.62
2026-07-24
$88.46
$89.63
$85.83
$86.81
$90.13
-1.67
-1.85%
$103.66
2026-07-27
$87.82
$89.77
$84.58
$89.04
$86.81
+1.01
+1.16%
$104.86
2026-07-28
$86.19
$86.88
$83.63
$84.39
$89.04
-2.85
-3.20%
$101.51
2026-07-29
$83.03
$84.60
$78.81
$78.86
$84.39
-1.36
-1.62%
$99.87
2026-07-30
$82.92
$84.99
$81.67
$83.74
$78.86
+4.06
+5.15%
$105.02
2026-07-31
$86.54
$86.70
$81.42
$81.61
$83.74
+2.80
+3.34%
$108.53
2026-08-03
$79.85
$83.66
$78.91
$80.40
$81.61
-1.76
-2.16%
$106.18
2026-08-04
$84.39
$84.48
$79.50
$80.78
$80.40
+3.99
+4.96%
$111.45
2026-08-05
$79.01
$80.79
$76.54
$76.91
$80.78
-1.77
-2.19%
$109.01
2026-08-06
$75.87
$80.42
$75.69
$78.33
$76.91
-1.04
-1.35%
$107.54
2026-08-07
$80.22
$81.63
$79.72
$81.17
$78.33
+1.89
+2.42%
$110.14
2026-08-10
$81.50
$82.51
$79.72
$79.78
$81.17
+0.33
+0.41%
$110.59
2026-08-11
$81.49
$82.65
$80.47
$81.11
$79.78
+1.71
+2.14%
$112.96
2026-08-12
$84.34
$84.84
$82.51
$83.32
$81.11
+3.23
+3.98%
$117.46
2026-08-13
$82.88
$84.50
$81.30
$81.56
$83.32
-0.44
-0.53%
$116.84
2026-08-14
$81.83
$83.57
$81.50
$82.66
$81.56
+0.27
+0.34%
$117.23
2026-08-17
$83.34
$85.55
$83.28
$83.38
$82.66
+0.68
+0.82%
$118.20
2026-08-18
$79.99
$80.90
$76.97
$79.42
$83.38
-3.39
-4.07%
$113.39
2026-08-19
$80.53
$81.07
$76.43
$76.58
$79.42
+1.11
+1.40%
$114.98
2026-08-20
$76.00
$76.60
$74.50
$74.71
$76.58
-0.58
-0.76%
$114.10
2026-08-21
$75.27
$75.67
$73.52
$74.21
$74.71
+0.56
+0.75%
$114.96
2026-08-24
$73.45
$73.53
$70.92
$71.93
$74.21
-0.76
-1.02%
$113.78
2026-08-25
$73.13
$73.32
$71.63
$72.51
$71.93
+1.20
+1.67%
$115.68
2026-08-26
$72.56
$73.83
$72.39
$73.22
$72.51
+0.05
+0.07%
$115.76
2026-08-27
$74.55
$74.91
$73.19
$74.80
$73.22
+1.33
+1.82%
$117.86
2026-08-28
$74.40
$74.40
$72.05
$72.61
$74.80
-0.40
-0.53%
$117.23
2026-08-31
$73.55
$74.98
$73.35
$74.09
$72.61
+0.94
+1.29%
$118.75
2026-09-01
$72.63
$73.10
$71.42
$72.65
$74.09
-1.46
-1.97%
$116.41
2026-09-02
$72.86
$74.14
$71.66
$72.34
$72.65
+0.21
+0.29%
$116.75
2026-09-03
$72.19
$74.31
$71.36
$73.65
$72.34
-0.15
-0.21%
$116.50
2026-09-04
$75.23
$75.31
$73.57
$74.38
$73.65
+1.58
+2.15%
$119.00
2026-09-08
$74.81
$74.95
$70.87
$71.08
$74.38
+0.43
+0.58%
$119.69
2026-09-09
$70.83
$72.45
$70.57
$70.98
$71.08
-0.25
-0.35%
$119.27
2026-09-10
$69.42
$70.55
$68.80
$70.17
$70.98
-1.56
-2.20%
$116.65
2026-09-11
$70.98
$76.19
$70.38
$76.14
$70.17
+0.81
+1.15%
$118.00
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2026-06-08
(same window as the chart overlay and table above, just plotted as % instead of $).
🗓️ Overnight End-of-Month PnL
One checkpoint per calendar month (value at the last trading day seen that month) from the
same overnight-only cumulative series above. The first and last
month shown may be partial if the data window doesn't start/end on a month boundary.
Month
Start Value
End Value
PnL $
PnL %
2026-06
$120.90
$114.48
-6.42
-5.31%
2026-07
$114.48
$108.53
-5.95
-5.20%
2026-08
$108.53
$118.75
+10.22
+9.42%
2026-09
$118.75
$118.00
-0.75
-0.64%
🌙 Overnight vs. Intraday Return
Overnight (close→next open) Intraday (open→close)
From 2016-01-04 to 2026-09-04 (2,676 trading days), $1 invested
overnight-only would now be worth $7.05;
$1 invested intraday-only would be worth $1.09.
ON's historical return has leaned mostly on the overnight session.
This reflects a statistical pattern in past prices, not a trading strategy or investment advice —
it ignores transaction costs and slippage.
🎯 Best Strategy Backtest
See which saved strategy has the best real backtested win-rate on ON, with buy/sell triggers plotted right on the chart.