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
2018-10-01
₩72.03
+0.43
+0.60%
₩72.46
₩72.46
₩73.43
₩72.10
₩72.60
2018-10-02
₩72.60
-0.20
-0.28%
₩72.26
₩72.40
₩73.91
₩72.27
₩73.35
2018-10-03
₩73.35
+0.24
+0.33%
₩72.50
₩73.59
₩73.89
₩72.59
₩72.64
2018-10-04
₩72.64
-0.64
-0.88%
₩71.86
₩72.00
₩72.70
₩71.86
₩72.38
2018-10-05
₩72.38
+0.01
+0.01%
₩71.87
₩72.39
₩72.66
₩70.55
₩71.21
2018-10-08
₩71.21
-0.43
-0.60%
₩71.43
₩70.78
₩71.60
₩70.56
₩70.93
2018-10-09
₩70.93
-0.17
-0.24%
₩71.26
₩70.76
₩70.96
₩70.09
₩70.13
2018-10-10
₩70.13
-1.36
-1.94%
₩69.88
₩68.77
₩69.56
₩66.62
₩66.73
2018-10-11
₩66.73
-0.38
-0.57%
₩69.48
₩66.35
₩66.99
₩63.61
₩64.29
2018-10-12
₩64.29
+1.26
+1.96%
₩70.84
₩65.55
₩65.65
₩63.27
₩64.29
2018-10-15
₩64.29
-0.06
-0.09%
₩70.78
₩64.23
₩65.20
₩64.01
₩64.17
2018-10-16
₩64.17
+0.61
+0.95%
₩71.45
₩64.78
₩66.39
₩64.62
₩66.12
2018-10-17
₩66.12
+0.26
+0.39%
₩71.73
₩66.38
₩66.61
₩65.29
₩66.10
2018-10-18
₩66.10
-0.42
-0.64%
₩71.28
₩65.68
₩66.32
₩64.87
₩65.15
2018-10-19
₩65.15
+0.30
+0.46%
₩71.60
₩65.45
₩66.21
₩65.00
₩65.36
2018-10-22
₩65.36
+0.33
+0.50%
₩71.97
₩65.69
₩66.60
₩65.22
₩66.12
2018-10-23
₩66.12
-2.46
-3.72%
₩69.29
₩63.66
₩66.92
₩63.57
₩66.38
2018-10-24
₩66.38
-0.51
-0.77%
₩68.76
₩65.87
₩66.39
₩62.50
₩62.62
2018-10-25
₩62.62
+1.19
+1.90%
₩70.06
₩63.81
₩63.83
₩62.35
₩63.20
2018-10-26
₩63.20
-1.70
-2.69%
₩68.18
₩61.50
₩63.64
₩61.18
₩62.48
2018-10-29
₩62.48
+1.02
+1.63%
₩69.29
₩63.50
₩63.69
₩61.27
₩62.17
2018-10-30
₩62.17
+0.19
+0.31%
₩69.50
₩62.36
₩63.72
₩62.17
₩63.18
2018-10-31
₩63.18
-0.27
-0.43%
₩69.21
₩62.91
₩63.52
₩62.07
₩62.89
2018-11-01
₩62.89
+0.31
+0.49%
₩69.55
₩63.20
₩64.31
₩62.88
₩63.71
2018-11-02
₩63.71
+0.23
+0.36%
₩69.80
₩63.94
₩63.95
₩62.34
₩63.33
2018-11-05
₩63.33
-0.25
-0.39%
₩69.52
₩63.08
₩63.80
₩62.66
₩63.47
2018-11-06
₩63.47
-0.12
-0.19%
₩69.39
₩63.35
₩64.34
₩62.41
₩63.63
2018-11-07
₩63.63
-0.13
-0.20%
₩69.25
₩63.50
₩63.75
₩62.28
₩63.21
2018-11-08
₩63.21
-5.21
-8.24%
₩63.54
₩58.00
₩60.15
₩57.60
₩58.05
2018-11-09
₩58.05
-0.27
-0.47%
₩63.25
₩57.78
₩58.24
₩56.19
₩56.72
2018-11-12
₩56.72
-0.35
-0.62%
₩62.86
₩56.37
₩56.50
₩54.43
₩54.49
2018-11-13
₩54.49
+0.25
+0.46%
₩63.14
₩54.74
₩55.49
₩54.05
₩54.16
2018-11-14
₩54.16
+0.68
+1.26%
₩63.94
₩54.84
₩54.89
₩53.67
₩53.94
2018-11-15
₩53.94
-0.11
-0.20%
₩63.81
₩53.83
₩55.54
₩53.53
₩55.39
2018-11-16
₩55.39
-0.27
-0.49%
₩63.50
₩55.12
₩57.04
₩54.99
₩55.88
2018-11-19
₩55.88
-0.03
-0.05%
₩63.46
₩55.85
₩56.62
₩54.87
₩54.90
2018-11-20
₩54.90
-0.70
-1.28%
₩62.65
₩54.20
₩55.43
₩54.07
₩54.92
2018-11-21
₩54.92
+0.29
+0.53%
₩62.98
₩55.21
₩56.50
₩55.18
₩55.27
2018-11-23
₩55.27
-0.50
-0.90%
₩62.41
₩54.77
₩55.74
₩54.75
₩55.25
2018-11-26
₩55.25
+0.54
+0.98%
₩63.02
₩55.79
₩56.38
₩55.17
₩55.73
2018-11-27
₩55.73
-0.14
-0.25%
₩62.87
₩55.59
₩56.23
₩55.35
₩55.57
2018-11-28
₩55.57
+0.32
+0.58%
₩63.23
₩55.89
₩56.72
₩54.69
₩56.65
2018-11-29
₩56.65
+1.24
+2.19%
₩64.61
₩57.89
₩59.05
₩57.77
₩58.11
2018-11-30
₩58.11
+0.11
+0.19%
₩64.73
₩58.22
₩58.47
₩57.02
₩58.26
2018-12-03
₩58.26
+2.25
+3.86%
₩67.23
₩60.51
₩60.51
₩58.40
₩59.14
2018-12-04
₩59.14
-0.15
-0.25%
₩67.06
₩58.99
₩59.48
₩57.22
₩57.73
2018-12-05
₩57.73
+1.41
+2.44%
₩68.70
₩59.14
₩59.14
₩59.14
₩59.14
2018-12-06
₩59.14
-3.13
-5.29%
₩65.06
₩56.01
₩57.21
₩55.69
₩57.11
2018-12-07
₩57.11
-0.50
-0.88%
₩64.50
₩56.61
₩57.12
₩55.73
₩55.99
2018-12-10
₩55.99
+1.78
+3.18%
₩66.55
₩57.77
₩58.25
₩56.64
₩57.24
2018-12-11
₩57.24
+1.21
+2.11%
₩67.95
₩58.45
₩58.66
₩56.83
₩57.35
2018-12-12
₩57.35
+1.09
+1.90%
₩69.24
₩58.44
₩58.58
₩57.53
₩57.72
2018-12-13
₩57.72
+0.42
+0.73%
₩69.75
₩58.14
₩58.38
₩57.56
₩58.09
2018-12-14
₩58.09
-0.53
-0.91%
₩69.11
₩57.56
₩59.00
₩57.36
₩57.62
2018-12-17
₩57.62
-0.03
-0.05%
₩69.08
₩57.59
₩58.34
₩56.67
₩57.00
2018-12-18
₩57.00
+0.69
+1.21%
₩69.91
₩57.69
₩58.54
₩57.40
₩57.78
2018-12-19
₩57.78
-0.24
-0.42%
₩69.62
₩57.54
₩58.50
₩56.06
₩56.69
2018-12-20
₩56.69
+0.53
+0.93%
₩70.27
₩57.22
₩57.94
₩56.06
₩56.37
2018-12-21
₩56.37
-0.11
-0.20%
₩70.14
₩56.26
₩57.28
₩54.69
₩54.85
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2018-09-28
(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 %
2018-09
₩72.03
₩72.03
+0.00
+0.00%
2018-10
₩72.03
₩69.21
-2.82
-3.92%
2018-11
₩69.21
₩64.73
-4.47
-6.46%
2018-12
₩64.73
₩70.14
+5.40
+8.34%
📅 Seasonality — Close Price by Year
Each line is one calendar year's close price (or % 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 2010-01-04 to 2026-10-09 (4,213 trading days), $1 invested
overnight-only would now be worth $3.66;
$1 invested intraday-only would be worth $1.25.
QCOM'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 QCOM, with buy/sell triggers plotted right on the chart.