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
₱270.00
₱272.20
₱268.00
₱269.00
₱270.00
+0.00
+0.00%
₱270.00
2026-06-04
₱270.00
₱270.00
₱268.40
₱269.00
₱269.00
+1.00
+0.37%
₱271.00
2026-06-05
₱269.00
₱269.00
₱267.40
₱267.40
₱269.00
+0.00
+0.00%
₱271.00
2026-06-08
₱268.00
₱269.40
₱264.40
₱264.80
₱267.40
+0.60
+0.22%
₱271.61
2026-06-09
₱264.80
₱265.20
₱259.00
₱262.00
₱264.80
+0.00
+0.00%
₱271.61
2026-06-10
₱262.00
₱263.40
₱258.80
₱260.00
₱262.00
+0.00
+0.00%
₱271.61
2026-06-11
₱261.00
₱269.60
₱260.20
₱268.80
₱260.00
+1.00
+0.38%
₱272.66
2026-06-15
₱268.80
₱269.80
₱263.80
₱265.00
₱268.80
+0.00
+0.00%
₱272.66
2026-06-16
₱265.00
₱269.80
₱264.00
₱265.00
₱265.00
+0.00
+0.00%
₱272.66
2026-06-17
₱268.80
₱268.80
₱265.00
₱265.00
₱265.00
+3.80
+1.43%
₱276.57
2026-06-18
₱265.00
₱268.00
₱261.00
₱261.00
₱265.00
+0.00
+0.00%
₱276.57
2026-06-19
₱261.00
₱269.00
₱260.00
₱269.00
₱261.00
+0.00
+0.00%
₱276.57
2026-06-24
₱259.00
₱262.80
₱256.40
₱259.00
₱269.00
-10.00
-3.72%
₱266.29
2026-06-25
₱260.00
₱261.40
₱260.00
₱261.40
₱259.00
+1.00
+0.39%
₱267.31
2026-06-26
₱261.40
₱263.00
₱261.40
₱262.00
₱261.40
+0.00
+0.00%
₱267.31
2026-06-29
₱263.00
₱265.00
₱263.00
₱264.20
₱262.00
+1.00
+0.38%
₱268.33
2026-06-30
₱265.00
₱265.00
₱263.00
₱263.00
₱264.20
+0.80
+0.30%
₱269.15
2026-07-01
₱264.00
₱264.60
₱252.80
₱253.00
₱263.00
+1.00
+0.38%
₱270.17
2026-07-02
₱255.60
₱263.60
₱253.00
₱253.00
₱253.00
+2.60
+1.03%
₱272.95
2026-07-03
₱253.00
₱260.00
₱253.00
₱253.00
₱253.00
+0.00
+0.00%
₱272.95
2026-07-07
₱253.00
₱256.00
₱252.20
₱254.00
₱253.00
+0.00
+0.00%
₱272.95
2026-07-08
₱256.00
₱256.00
₱254.00
₱256.00
₱254.00
+2.00
+0.79%
₱275.09
2026-07-17
₱262.80
₱262.80
₱255.00
₱260.40
₱256.00
+6.80
+2.66%
₱282.40
2026-07-22
₱264.40
₱265.40
₱263.40
₱264.40
₱260.40
+4.00
+1.54%
₱286.74
2026-07-23
₱265.00
₱265.40
₱264.00
₱265.40
₱264.40
+0.60
+0.23%
₱287.39
2026-07-24
₱265.80
₱265.80
₱262.80
₱265.20
₱265.40
+0.40
+0.15%
₱287.82
2026-07-27
₱265.20
₱265.80
₱260.00
₱260.80
₱265.20
+0.00
+0.00%
₱287.82
2026-07-28
₱260.80
₱266.40
₱260.00
₱262.00
₱260.80
+0.00
+0.00%
₱287.82
2026-07-29
₱266.20
₱267.00
₱262.20
₱266.60
₱262.00
+4.20
+1.60%
₱292.44
2026-07-30
₱267.40
₱267.40
₱262.00
₱263.20
₱266.60
+0.80
+0.30%
₱293.32
2026-07-31
₱267.20
₱267.40
₱262.80
₱266.40
₱263.20
+4.00
+1.52%
₱297.77
2026-08-03
₱266.40
₱266.40
₱261.00
₱262.00
₱266.40
+0.00
+0.00%
₱297.77
2026-08-04
₱260.00
₱262.00
₱259.40
₱260.00
₱262.00
-2.00
-0.76%
₱295.50
2026-08-05
₱259.00
₱259.00
₱237.00
₱252.00
₱260.00
-1.00
-0.38%
₱294.36
2026-08-06
₱252.00
₱252.00
₱245.00
₱251.80
₱252.00
+0.00
+0.00%
₱294.36
2026-08-07
₱251.80
₱251.80
₱246.60
₱250.80
₱251.80
+0.00
+0.00%
₱294.36
2026-08-10
₱250.80
₱251.00
₱248.00
₱250.20
₱250.80
+0.00
+0.00%
₱294.36
2026-08-11
₱250.20
₱250.20
₱249.00
₱250.00
₱250.20
+0.00
+0.00%
₱294.36
2026-08-12
₱250.00
₱250.00
₱242.00
₱245.80
₱250.00
+0.00
+0.00%
₱294.36
2026-08-13
₱245.80
₱245.80
₱244.00
₱245.00
₱245.80
+0.00
+0.00%
₱294.36
2026-08-14
₱244.00
₱245.00
₱236.00
₱236.40
₱245.00
-1.00
-0.41%
₱293.16
2026-08-17
₱236.40
₱243.60
₱236.00
₱237.40
₱236.40
+0.00
+0.00%
₱293.16
2026-08-18
₱237.40
₱241.00
₱229.80
₱230.00
₱237.40
+0.00
+0.00%
₱293.16
2026-08-19
₱230.00
₱234.40
₱229.00
₱230.00
₱230.00
+0.00
+0.00%
₱293.16
2026-08-20
₱230.00
₱233.80
₱230.00
₱233.00
₱230.00
+0.00
+0.00%
₱293.16
2026-08-24
₱233.00
₱233.00
₱224.00
₱224.00
₱233.00
+0.00
+0.00%
₱293.16
2026-08-25
₱230.00
₱230.00
₱224.00
₱227.00
₱224.00
+6.00
+2.68%
₱301.01
2026-08-26
₱230.00
₱230.00
₱225.80
₱226.40
₱227.00
+3.00
+1.32%
₱304.99
2026-08-27
₱226.00
₱226.00
₱215.60
₱218.00
₱226.40
-0.40
-0.18%
₱304.45
2026-08-28
₱218.00
₱220.00
₱217.80
₱218.00
₱218.00
+0.00
+0.00%
₱304.45
2026-09-01
₱219.00
₱224.00
₱217.80
₱218.00
₱218.00
+1.00
+0.46%
₱305.85
2026-09-02
₱218.00
₱222.00
₱217.60
₱220.00
₱218.00
+0.00
+0.00%
₱305.85
2026-09-03
₱220.00
₱232.60
₱220.00
₱230.00
₱220.00
+0.00
+0.00%
₱305.85
2026-09-04
₱232.60
₱232.60
₱230.00
₱232.40
₱230.00
+2.60
+1.13%
₱309.31
2026-09-07
₱232.00
₱232.40
₱230.40
₱231.00
₱232.40
-0.40
-0.17%
₱308.78
2026-09-08
₱231.00
₱232.00
₱231.00
₱232.00
₱231.00
+0.00
+0.00%
₱308.78
2026-09-09
₱232.00
₱232.00
₱230.00
₱232.00
₱232.00
+0.00
+0.00%
₱308.78
2026-09-10
₱232.00
₱233.00
₱228.00
₱228.00
₱232.00
+0.00
+0.00%
₱308.78
2026-09-11
₱230.00
₱231.80
₱218.60
₱219.00
₱228.00
+2.00
+0.88%
₱311.48
📈 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
₱270.00
₱269.15
-0.85
-0.32%
2026-07
₱269.15
₱297.77
+28.63
+10.64%
2026-08
₱297.77
₱304.45
+6.68
+2.24%
2026-09
₱304.45
₱311.48
+7.03
+2.31%
🌙 Overnight vs. Intraday Return
Overnight (close→next open) Intraday (open→close)
From 1995-04-24 to 2026-09-04 (6,923 trading days), $1 invested
overnight-only would now be worth $0.00;
$1 invested intraday-only would be worth $23,491.66.
GSMI'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 GSMI, with buy/sell triggers plotted right on the chart.