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
2026-06-03
₱1.11
₱1.11
₱1.09
₱1.10
₱1.11
+0.00
+0.00%
₱1.11
2026-06-04
₱1.10
₱1.12
₱1.10
₱1.12
₱1.10
+0.00
+0.00%
₱1.11
2026-06-05
₱1.12
₱1.12
₱1.10
₱1.12
₱1.12
+0.00
+0.00%
₱1.11
2026-06-08
₱1.11
₱1.11
₱1.08
₱1.08
₱1.12
-0.01
-0.89%
₱1.10
2026-06-09
₱1.09
₱1.09
₱1.07
₱1.08
₱1.08
+0.01
+0.93%
₱1.11
2026-06-10
₱1.07
₱1.07
₱1.05
₱1.05
₱1.08
-0.01
-0.93%
₱1.10
2026-06-11
₱1.06
₱1.07
₱1.05
₱1.06
₱1.05
+0.01
+0.95%
₱1.11
2026-06-15
₱1.08
₱1.08
₱1.07
₱1.07
₱1.06
+0.02
+1.89%
₱1.13
2026-06-16
₱1.07
₱1.12
₱1.07
₱1.12
₱1.07
+0.00
+0.00%
₱1.13
2026-06-17
₱1.09
₱1.11
₱1.09
₱1.10
₱1.12
-0.03
-2.68%
₱1.10
2026-06-18
₱1.10
₱1.11
₱1.09
₱1.09
₱1.10
+0.00
+0.00%
₱1.10
2026-06-19
₱1.10
₱1.11
₱1.09
₱1.09
₱1.09
+0.01
+0.92%
₱1.11
2026-06-24
₱1.10
₱1.12
₱1.10
₱1.10
₱1.09
+0.01
+0.92%
₱1.12
2026-06-25
₱1.11
₱1.12
₱1.09
₱1.10
₱1.10
+0.01
+0.91%
₱1.13
2026-06-26
₱1.12
₱1.14
₱1.12
₱1.13
₱1.10
+0.02
+1.82%
₱1.15
2026-06-29
₱1.14
₱1.16
₱1.13
₱1.16
₱1.13
+0.01
+0.88%
₱1.16
2026-06-30
₱1.16
₱1.16
₱1.15
₱1.16
₱1.16
+0.00
+0.00%
₱1.16
2026-07-01
₱1.16
₱1.21
₱1.15
₱1.20
₱1.16
+0.00
+0.00%
₱1.16
2026-07-02
₱1.21
₱1.38
₱1.21
₱1.37
₱1.20
+0.01
+0.83%
₱1.17
2026-07-03
₱1.38
₱1.43
₱1.35
₱1.39
₱1.37
+0.01
+0.73%
₱1.18
2026-07-07
₱1.40
₱1.40
₱1.37
₱1.38
₱1.39
+0.01
+0.72%
₱1.19
2026-07-08
₱1.38
₱1.45
₱1.34
₱1.40
₱1.38
+0.00
+0.00%
₱1.19
2026-07-17
₱1.39
₱1.40
₱1.34
₱1.36
₱1.40
-0.01
-0.71%
₱1.18
2026-07-22
₱1.37
₱1.41
₱1.34
₱1.41
₱1.36
+0.01
+0.74%
₱1.19
2026-07-23
₱1.41
₱1.44
₱1.38
₱1.40
₱1.41
+0.00
+0.00%
₱1.19
2026-07-24
₱1.40
₱1.40
₱1.34
₱1.34
₱1.40
+0.00
+0.00%
₱1.19
2026-07-27
₱1.38
₱1.39
₱1.35
₱1.35
₱1.34
+0.04
+2.99%
₱1.22
2026-07-28
₱1.35
₱1.37
₱1.32
₱1.36
₱1.35
+0.00
+0.00%
₱1.22
2026-07-29
₱1.37
₱1.37
₱1.33
₱1.36
₱1.36
+0.01
+0.74%
₱1.23
2026-07-30
₱1.37
₱1.37
₱1.34
₱1.37
₱1.36
+0.01
+0.74%
₱1.24
2026-07-31
₱1.38
₱1.40
₱1.35
₱1.37
₱1.37
+0.01
+0.73%
₱1.25
2026-08-03
₱1.38
₱1.38
₱1.35
₱1.37
₱1.37
+0.01
+0.73%
₱1.26
2026-08-04
₱1.37
₱1.38
₱1.36
₱1.36
₱1.37
+0.00
+0.00%
₱1.26
2026-08-05
₱1.36
₱1.55
₱1.36
₱1.51
₱1.36
+0.00
+0.00%
₱1.26
2026-08-06
₱1.53
₱1.58
₱1.50
₱1.50
₱1.51
+0.02
+1.32%
₱1.28
2026-08-07
₱1.52
₱1.53
₱1.40
₱1.45
₱1.50
+0.02
+1.33%
₱1.29
2026-08-10
₱1.45
₱1.55
₱1.45
₱1.47
₱1.45
+0.00
+0.00%
₱1.29
2026-08-11
₱1.48
₱1.54
₱1.47
₱1.53
₱1.47
+0.01
+0.68%
₱1.30
2026-08-12
₱1.53
₱1.57
₱1.48
₱1.49
₱1.53
+0.00
+0.00%
₱1.30
2026-08-13
₱1.50
₱1.50
₱1.45
₱1.47
₱1.49
+0.01
+0.67%
₱1.31
2026-08-14
₱1.47
₱2.05
₱1.47
₱1.93
₱1.47
+0.00
+0.00%
₱1.31
2026-08-17
₱1.96
₱2.15
₱1.96
₱2.09
₱1.93
+0.03
+1.55%
₱1.33
2026-08-18
₱2.10
₱2.12
₱1.90
₱2.05
₱2.09
+0.01
+0.48%
₱1.34
2026-08-19
₱2.05
₱2.26
₱1.98
₱2.19
₱2.05
+0.00
+0.00%
₱1.34
2026-08-20
₱2.20
₱2.22
₱2.08
₱2.10
₱2.19
+0.01
+0.46%
₱1.35
2026-08-24
₱2.10
₱2.16
₱2.02
₱2.10
₱2.10
+0.00
+0.00%
₱1.35
2026-08-25
₱2.10
₱2.22
₱2.10
₱2.13
₱2.10
+0.00
+0.00%
₱1.35
2026-08-26
₱2.10
₱2.21
₱2.07
₱2.16
₱2.13
-0.03
-1.41%
₱1.33
2026-08-27
₱2.18
₱2.22
₱2.09
₱2.13
₱2.16
+0.02
+0.93%
₱1.34
2026-08-28
₱2.13
₱2.48
₱2.13
₱2.42
₱2.13
+0.00
+0.00%
₱1.34
2026-09-01
₱2.45
₱2.59
₱2.35
₱2.44
₱2.42
+0.03
+1.24%
₱1.36
2026-09-02
₱2.45
₱2.48
₱2.35
₱2.44
₱2.44
+0.01
+0.41%
₱1.36
2026-09-03
₱2.48
₱2.68
₱2.47
₱2.65
₱2.44
+0.04
+1.64%
₱1.38
2026-09-04
₱2.68
₱2.78
₱2.57
₱2.60
₱2.65
+0.03
+1.13%
₱1.40
2026-09-07
₱2.60
₱2.85
₱2.58
₱2.84
₱2.60
+0.00
+0.00%
₱1.40
2026-09-08
₱2.86
₱2.95
₱2.78
₱2.81
₱2.84
+0.02
+0.70%
₱1.41
2026-09-09
₱2.84
₱2.92
₱2.81
₱2.85
₱2.81
+0.03
+1.07%
₱1.42
2026-09-10
₱2.90
₱2.93
₱2.87
₱2.90
₱2.85
+0.05
+1.75%
₱1.45
2026-09-11
₱2.90
₱3.22
₱2.90
₱3.19
₱2.90
+0.00
+0.00%
₱1.45
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2026-06-02
(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
₱1.11
₱1.16
+0.05
+4.72%
2026-07
₱1.16
₱1.25
+0.09
+7.71%
2026-08
₱1.25
₱1.34
+0.09
+6.92%
2026-09
₱1.34
₱1.45
+0.11
+8.22%
🌙 Overnight vs. Intraday Return
Overnight (close→next open) Intraday (open→close)
From 1995-09-12 to 2026-09-04 (6,509 trading days), $1 invested
overnight-only would now be worth $0.01;
$1 invested intraday-only would be worth $30.90.
ION's historical return has leaned mostly on the regular trading session (intraday).
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 ION, with buy/sell triggers plotted right on the chart.