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
2026-06-19
₩45,200.00
₩45,850.00
₩43,050.00
₩44,000.00
₩46,050.00
-850.00
-1.85%
₩45,200.00
2026-06-22
₩43,600.00
₩44,100.00
₩42,250.00
₩42,250.00
₩44,000.00
-400.00
-0.91%
₩44,789.09
2026-06-23
₩41,200.00
₩42,250.00
₩38,850.00
₩38,850.00
₩42,250.00
-1050.00
-2.49%
₩43,675.99
2026-06-24
₩38,600.00
₩40,300.00
₩37,850.00
₩39,500.00
₩38,850.00
-250.00
-0.64%
₩43,394.93
2026-06-25
₩39,000.00
₩42,400.00
₩39,000.00
₩40,950.00
₩39,500.00
-500.00
-1.27%
₩42,845.63
2026-06-26
₩39,950.00
₩40,600.00
₩36,550.00
₩38,050.00
₩40,950.00
-1000.00
-2.44%
₩41,799.34
2026-06-29
₩37,800.00
₩41,800.00
₩37,800.00
₩41,400.00
₩38,050.00
-250.00
-0.66%
₩41,524.71
2026-06-30
₩41,400.00
₩41,900.00
₩40,725.00
₩41,050.00
₩41,400.00
+0.00
+0.00%
₩41,524.71
2026-07-01
₩41,900.00
₩42,900.00
₩40,750.00
₩41,100.00
₩41,050.00
+850.00
+2.07%
₩42,384.53
2026-07-02
₩40,700.00
₩42,350.00
₩39,500.00
₩40,600.00
₩41,100.00
-400.00
-0.97%
₩41,972.03
2026-07-03
₩40,350.00
₩40,800.00
₩38,500.00
₩40,600.00
₩40,600.00
-250.00
-0.62%
₩41,713.58
2026-07-06
₩40,500.00
₩41,500.00
₩39,150.00
₩39,700.00
₩40,600.00
-100.00
-0.25%
₩41,610.84
2026-07-07
₩39,250.00
₩40,050.00
₩38,300.00
₩39,500.00
₩39,700.00
-450.00
-1.13%
₩41,139.18
2026-07-08
₩38,350.00
₩39,350.00
₩37,100.00
₩38,150.00
₩39,500.00
-1150.00
-2.91%
₩39,941.46
2026-07-09
₩37,500.00
₩38,500.00
₩36,900.00
₩37,450.00
₩38,150.00
-650.00
-1.70%
₩39,260.94
2026-07-10
₩37,700.00
₩39,950.00
₩37,700.00
₩38,850.00
₩37,450.00
+250.00
+0.67%
₩39,523.03
2026-07-13
₩39,250.00
₩40,600.00
₩39,050.00
₩39,750.00
₩38,850.00
+400.00
+1.03%
₩39,929.96
2026-07-14
₩39,400.00
₩39,800.00
₩37,550.00
₩37,950.00
₩39,750.00
-350.00
-0.88%
₩39,578.37
2026-07-15
₩39,200.00
₩41,550.00
₩39,150.00
₩40,550.00
₩37,950.00
+1250.00
+3.29%
₩40,882.01
2026-07-16
₩40,150.00
₩41,850.00
₩39,750.00
₩40,900.00
₩40,550.00
-400.00
-0.99%
₩40,478.73
2026-07-20
₩39,950.00
₩40,550.00
₩39,100.00
₩39,700.00
₩40,900.00
-950.00
-2.32%
₩39,538.52
2026-07-21
₩40,450.00
₩41,650.00
₩39,700.00
₩40,800.00
₩39,700.00
+750.00
+1.89%
₩40,285.47
2026-07-22
₩41,650.00
₩43,300.00
₩41,050.00
₩41,200.00
₩40,800.00
+850.00
+2.08%
₩41,124.75
2026-07-23
₩40,950.00
₩46,200.00
₩40,950.00
₩43,350.00
₩41,200.00
-250.00
-0.61%
₩40,875.20
2026-07-24
₩42,500.00
₩43,150.00
₩41,350.00
₩41,900.00
₩43,350.00
-850.00
-1.96%
₩40,073.73
2026-07-27
₩42,900.00
₩45,350.00
₩42,150.00
₩44,750.00
₩41,900.00
+1000.00
+2.39%
₩41,030.14
2026-07-28
₩42,950.00
₩44,250.00
₩41,250.00
₩41,950.00
₩44,750.00
-1800.00
-4.02%
₩39,379.77
2026-07-29
₩42,250.00
₩42,900.00
₩38,200.00
₩39,350.00
₩41,950.00
+300.00
+0.72%
₩39,661.39
2026-07-30
₩37,550.00
₩41,400.00
₩37,550.00
₩39,900.00
₩39,350.00
-1800.00
-4.57%
₩37,847.14
2026-07-31
₩41,150.00
₩42,800.00
₩41,050.00
₩42,600.00
₩39,900.00
+1250.00
+3.13%
₩39,032.83
2026-08-03
₩41,850.00
₩43,550.00
₩41,850.00
₩42,950.00
₩42,600.00
-750.00
-1.76%
₩38,345.63
2026-08-04
₩43,350.00
₩44,350.00
₩41,050.00
₩43,800.00
₩42,950.00
+400.00
+0.93%
₩38,702.75
2026-08-05
₩44,550.00
₩46,750.00
₩41,550.00
₩41,550.00
₩43,800.00
+750.00
+1.71%
₩39,365.47
2026-08-06
₩42,100.00
₩42,350.00
₩40,600.00
₩41,800.00
₩41,550.00
+550.00
+1.32%
₩39,886.55
2026-08-07
₩41,700.00
₩42,625.00
₩41,150.00
₩42,000.00
₩41,800.00
-100.00
-0.24%
₩39,791.13
2026-08-10
₩42,050.00
₩44,500.00
₩41,750.00
₩44,200.00
₩42,000.00
+50.00
+0.12%
₩39,838.50
2026-08-11
₩44,000.00
₩46,100.00
₩43,750.00
₩44,900.00
₩44,200.00
-200.00
-0.45%
₩39,658.24
2026-08-12
₩44,950.00
₩45,400.00
₩43,950.00
₩43,950.00
₩44,900.00
+50.00
+0.11%
₩39,702.40
2026-08-13
₩44,350.00
₩44,700.00
₩43,600.00
₩44,700.00
₩43,950.00
+400.00
+0.91%
₩40,063.74
2026-08-14
₩44,700.00
₩46,050.00
₩44,700.00
₩45,150.00
₩44,700.00
+0.00
+0.00%
₩40,063.74
2026-08-18
₩44,850.00
₩45,100.00
₩42,300.00
₩42,850.00
₩45,150.00
-300.00
-0.66%
₩39,797.54
2026-08-19
₩41,800.00
₩42,000.00
₩40,650.00
₩41,250.00
₩42,850.00
-1050.00
-2.45%
₩38,822.33
2026-08-20
₩43,200.00
₩46,850.00
₩43,200.00
₩44,950.00
₩41,250.00
+1950.00
+4.73%
₩40,657.57
2026-08-21
₩45,350.00
₩46,000.00
₩41,500.00
₩42,500.00
₩44,950.00
+400.00
+0.89%
₩41,019.37
2026-08-24
₩42,900.00
₩46,750.00
₩42,750.00
₩44,800.00
₩42,500.00
+400.00
+0.94%
₩41,405.44
2026-08-25
₩44,300.00
₩47,050.00
₩43,100.00
₩46,100.00
₩44,800.00
-500.00
-1.12%
₩40,943.32
2026-08-26
₩45,850.00
₩47,000.00
₩44,550.00
₩46,300.00
₩46,100.00
-250.00
-0.54%
₩40,721.29
2026-08-27
₩46,350.00
₩49,000.00
₩46,000.00
₩46,900.00
₩46,300.00
+50.00
+0.11%
₩40,765.26
2026-08-28
₩47,600.00
₩48,350.00
₩46,550.00
₩47,350.00
₩46,900.00
+700.00
+1.49%
₩41,373.70
2026-08-31
₩45,400.00
₩46,450.00
₩44,100.00
₩46,450.00
₩47,350.00
-1950.00
-4.12%
₩39,669.82
2026-09-01
₩46,800.00
₩47,300.00
₩45,150.00
₩45,900.00
₩46,450.00
+350.00
+0.75%
₩39,968.73
2026-09-02
₩44,450.00
₩45,400.00
₩44,100.00
₩44,750.00
₩45,900.00
-1450.00
-3.16%
₩38,706.10
2026-09-03
₩45,050.00
₩45,950.00
₩43,750.00
₩44,800.00
₩44,750.00
+300.00
+0.67%
₩38,965.59
2026-09-04
₩46,550.00
₩48,200.00
₩46,150.00
₩47,300.00
₩44,800.00
+1750.00
+3.91%
₩40,487.68
2026-09-07
₩47,050.00
₩47,250.00
₩46,350.00
₩46,750.00
₩47,300.00
-250.00
-0.53%
₩40,273.69
2026-09-08
₩46,800.00
₩47,200.00
₩46,250.00
₩46,500.00
₩46,750.00
+50.00
+0.11%
₩40,316.76
2026-09-09
₩46,000.00
₩47,100.00
₩45,200.00
₩46,950.00
₩46,500.00
-500.00
-1.08%
₩39,883.25
2026-09-10
₩46,200.00
₩48,900.00
₩46,050.00
₩48,450.00
₩46,950.00
-750.00
-1.60%
₩39,246.13
2026-09-11
₩47,150.00
₩47,200.00
₩46,150.00
₩46,250.00
₩48,450.00
-1300.00
-2.68%
₩38,193.09
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2026-06-18
(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
₩46,050.00
₩41,524.71
-4525.29
-9.83%
2026-07
₩41,524.71
₩39,032.83
-2491.88
-6.00%
2026-08
₩39,032.83
₩39,669.82
+636.99
+1.63%
2026-09
₩39,669.82
₩38,193.09
-1476.73
-3.72%
🌙 Overnight vs. Intraday Return
Overnight (close→next open) Intraday (open→close)
From 2021-11-03 to 2026-09-04 (1,182 trading days), $1 invested
overnight-only would now be worth $0.56;
$1 invested intraday-only would be worth $0.44.
377300'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 377300, with buy/sell triggers plotted right on the chart.