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
Prior Close
Overnight $
Overnight %
Cum. Index
Open
High
Low
Close
2026-10-27
₱218.20
+0.00
+0.00%
₱281.83
₱218.20
₱220.00
₱215.00
₱215.60
2026-10-26
₱218.00
+0.00
+0.00%
₱281.83
₱218.00
₱219.20
₱217.00
₱218.20
2026-10-23
₱220.00
+0.00
+0.00%
₱281.83
₱220.00
₱220.00
₱216.00
₱218.00
2026-10-22
₱220.00
+0.00
+0.00%
₱281.83
₱220.00
₱223.40
₱218.40
₱220.00
2026-10-21
₱219.60
+3.00
+1.37%
₱281.83
₱222.60
₱222.60
₱218.00
₱220.00
2026-10-20
₱221.80
+0.00
+0.00%
₱278.03
₱221.80
₱223.80
₱218.80
₱219.60
2026-10-19
₱222.00
+0.00
+0.00%
₱278.03
₱222.00
₱222.40
₱220.00
₱221.80
2026-10-16
₱219.00
+0.00
+0.00%
₱278.03
₱219.00
₱222.60
₱218.00
₱222.00
2026-10-15
₱218.20
+0.00
+0.00%
₱278.03
₱218.20
₱220.00
₱216.00
₱219.00
2026-10-14
₱218.40
+0.00
+0.00%
₱278.03
₱218.40
₱219.00
₱216.60
₱218.20
2026-10-13
₱219.00
-2.00
-0.91%
₱278.03
₱217.00
₱219.80
₱217.00
₱218.40
2026-10-12
₱216.00
+0.00
+0.00%
₱280.60
₱216.00
₱219.20
₱216.00
₱219.00
2026-10-09
₱216.00
+0.40
+0.19%
₱280.60
₱216.40
₱218.00
₱215.20
₱216.00
2026-10-08
₱215.00
+1.80
+0.84%
₱280.08
₱216.80
₱216.80
₱211.40
₱216.00
2026-10-07
₱218.60
+0.00
+0.00%
₱277.75
₱218.60
₱218.60
₱215.00
₱215.00
2026-10-06
₱220.00
+0.00
+0.00%
₱277.75
₱220.00
₱221.00
₱216.00
₱218.60
2026-10-05
₱217.00
+0.00
+0.00%
₱277.75
₱217.00
₱221.00
₱217.00
₱220.00
2026-10-02
₱215.00
+0.00
+0.00%
₱277.75
₱215.00
₱222.80
₱214.80
₱217.00
2026-10-01
₱215.80
+0.00
+0.00%
₱277.75
₱215.80
₱215.80
₱212.20
₱215.00
2026-09-30
₱213.80
+0.00
+0.00%
₱277.75
₱213.80
₱215.80
₱212.20
₱215.80
2026-09-29
₱212.20
+0.00
+0.00%
₱277.75
₱212.20
₱215.00
₱212.20
₱213.80
2026-09-28
₱215.60
+0.00
+0.00%
₱277.75
₱215.60
₱215.80
₱211.20
₱212.20
2026-09-25
₱213.40
+0.20
+0.09%
₱277.75
₱213.60
₱215.60
₱210.20
₱215.60
2026-09-24
₱213.40
+0.00
+0.00%
₱277.49
₱213.40
₱216.00
₱212.00
₱213.40
2026-09-23
₱214.40
-2.40
-1.12%
₱277.49
₱212.00
₱217.00
₱210.00
₱213.40
2026-09-22
₱207.00
+0.00
+0.00%
₱280.63
₱207.00
₱215.00
₱207.00
₱214.40
2026-09-21
₱208.00
+0.00
+0.00%
₱280.63
₱208.00
₱214.00
₱207.00
₱207.00
2026-09-18
₱214.40
+2.60
+1.21%
₱280.63
₱217.00
₱217.00
₱200.40
₱208.00
2026-09-17
₱209.60
+0.00
+0.00%
₱277.27
₱209.60
₱218.20
₱209.40
₱214.40
2026-09-16
₱199.50
+0.50
+0.25%
₱277.27
₱200.00
₱211.20
₱200.00
₱209.60
2026-09-15
₱218.00
+2.00
+0.92%
₱276.58
₱220.00
₱220.00
₱169.00
₱199.50
2026-09-14
₱219.00
+0.00
+0.00%
₱274.06
₱219.00
₱222.60
₱217.00
₱218.00
2026-09-11
₱228.00
+2.00
+0.88%
₱274.06
₱230.00
₱231.80
₱218.60
₱219.00
2026-09-10
₱232.00
+0.00
+0.00%
₱271.68
₱232.00
₱233.00
₱228.00
₱228.00
2026-09-09
₱232.00
+0.00
+0.00%
₱271.68
₱232.00
₱232.00
₱230.00
₱232.00
2026-09-08
₱231.00
+0.00
+0.00%
₱271.68
₱231.00
₱232.00
₱231.00
₱232.00
2026-09-07
₱232.40
-0.40
-0.17%
₱271.68
₱232.00
₱232.40
₱230.40
₱231.00
2026-09-04
₱230.00
+2.60
+1.13%
₱272.15
₱232.60
₱232.60
₱230.00
₱232.40
2026-09-03
₱220.00
+0.00
+0.00%
₱269.11
₱220.00
₱232.60
₱220.00
₱230.00
2026-09-02
₱218.00
+0.00
+0.00%
₱269.11
₱218.00
₱222.00
₱217.60
₱220.00
2026-09-01
₱218.00
+1.00
+0.46%
₱269.11
₱219.00
₱224.00
₱217.80
₱218.00
2026-08-28
₱218.00
+0.00
+0.00%
₱267.88
₱218.00
₱220.00
₱217.80
₱218.00
2026-08-27
₱226.40
-0.40
-0.18%
₱267.88
₱226.00
₱226.00
₱215.60
₱218.00
2026-08-26
₱227.00
+3.00
+1.32%
₱268.35
₱230.00
₱230.00
₱225.80
₱226.40
2026-08-25
₱224.00
+6.00
+2.68%
₱264.85
₱230.00
₱230.00
₱224.00
₱227.00
2026-08-24
₱233.00
+0.00
+0.00%
₱257.94
₱233.00
₱233.00
₱224.00
₱224.00
2026-08-20
₱230.00
+0.00
+0.00%
₱257.94
₱230.00
₱233.80
₱230.00
₱233.00
2026-08-19
₱230.00
+0.00
+0.00%
₱257.94
₱230.00
₱234.40
₱229.00
₱230.00
2026-08-18
₱237.40
+0.00
+0.00%
₱257.94
₱237.40
₱241.00
₱229.80
₱230.00
2026-08-17
₱236.40
+0.00
+0.00%
₱257.94
₱236.40
₱243.60
₱236.00
₱237.40
2026-08-14
₱245.00
-1.00
-0.41%
₱257.94
₱244.00
₱245.00
₱236.00
₱236.40
2026-08-13
₱245.80
+0.00
+0.00%
₱259.00
₱245.80
₱245.80
₱244.00
₱245.00
2026-08-12
₱250.00
+0.00
+0.00%
₱259.00
₱250.00
₱250.00
₱242.00
₱245.80
2026-08-11
₱250.20
+0.00
+0.00%
₱259.00
₱250.20
₱250.20
₱249.00
₱250.00
2026-08-10
₱250.80
+0.00
+0.00%
₱259.00
₱250.80
₱251.00
₱248.00
₱250.20
2026-08-07
₱251.80
+0.00
+0.00%
₱259.00
₱251.80
₱251.80
₱246.60
₱250.80
2026-08-06
₱252.00
+0.00
+0.00%
₱259.00
₱252.00
₱252.00
₱245.00
₱251.80
2026-08-05
₱260.00
-1.00
-0.38%
₱259.00
₱259.00
₱259.00
₱237.00
₱252.00
2026-08-04
₱262.00
-2.00
-0.76%
₱260.00
₱260.00
₱262.00
₱259.40
₱260.00
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2026-08-03
(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 %
2026-08
₱262.00
₱267.88
+5.88
+2.24%
2026-09
₱267.88
₱277.75
+9.87
+3.69%
2026-10
₱277.75
₱281.83
+4.08
+1.47%
📅 Seasonality — Adjusted Close by Year
Each line is one calendar year's adjusted close price (split- and dividend-adjusted, so a stock split does not show as a
crash), or the % change from that year's first trading day in "% from Jan 1" mode, aligned by month/day so the same point in the calendar lines
up across years. Most recent year is drawn thicker. Click a year in the legend to hide/show it.
🌙 Overnight vs. Intraday Return
Overnight (close→next open) Intraday (open→close)
From 1995-04-24 to 2026-10-23 (6,958 trading days), $1 invested
overnight-only would now be worth $0.00;
$1 invested intraday-only would be worth $21,278.95.
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.
Watch an animated paper-trading replay of buying each lower-Bollinger-band touch and selling at the upper band on this stock, with your own capital and look-back, and the profit and loss building up as it plays.