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
₩769,000.00
+52000.00
+6.76%
₩1,271,717.68
₩821,000.00
₩874,000.00
₩821,000.00
₩828,000.00
2026-10-26
₩775,000.00
-23000.00
-2.97%
₩1,191,170.39
₩752,000.00
₩787,000.00
₩745,000.00
₩769,000.00
2026-10-23
₩751,000.00
-11000.00
-1.46%
₩1,227,602.47
₩740,000.00
₩777,000.00
₩719,000.00
₩775,000.00
2026-10-22
₩779,000.00
-13000.00
-1.67%
₩1,245,850.61
₩766,000.00
₩794,000.00
₩738,000.00
₩751,000.00
2026-10-21
₩741,000.00
+20000.00
+2.70%
₩1,266,994.29
₩761,000.00
₩799,000.00
₩758,000.00
₩779,000.00
2026-10-20
₩780,000.00
-2000.00
-0.26%
₩1,233,696.15
₩778,000.00
₩778,000.00
₩722,000.00
₩741,000.00
2026-10-19
₩784,000.00
-25000.00
-3.19%
₩1,236,867.60
₩759,000.00
₩780,000.00
₩736,000.00
₩780,000.00
2026-10-16
₩765,000.00
+23000.00
+3.01%
₩1,277,607.64
₩788,000.00
₩806,000.00
₩760,000.00
₩784,000.00
2026-10-15
₩852,000.00
-80000.00
-9.39%
₩1,240,317.07
₩772,000.00
₩795,000.00
₩751,000.00
₩765,000.00
2026-10-14
₩857,000.00
+6000.00
+0.70%
₩1,368,847.33
₩863,000.00
₩892,000.00
₩835,000.00
₩852,000.00
2026-10-13
₩984,000.00
-54000.00
-5.49%
₩1,359,330.43
₩930,000.00
₩943,000.00
₩847,000.00
₩857,000.00
2026-10-12
₩1,050,000.00
-51000.00
-4.86%
₩1,438,259.30
₩999,000.00
₩1,017,000.00
₩983,000.00
₩984,000.00
2026-10-08
₩1,142,000.00
+0.00
+0.00%
₩1,511,683.94
₩1,142,000.00
₩1,146,000.00
₩1,050,000.00
₩1,050,000.00
2026-10-07
₩1,161,000.00
-15000.00
-1.29%
₩1,511,683.94
₩1,146,000.00
₩1,195,000.00
₩1,138,000.00
₩1,142,000.00
2026-10-06
₩1,160,000.00
+14000.00
+1.21%
₩1,531,470.38
₩1,174,000.00
₩1,199,000.00
₩1,140,000.00
₩1,161,000.00
2026-10-02
₩1,155,000.00
-4000.00
-0.35%
₩1,513,207.53
₩1,151,000.00
₩1,164,000.00
₩1,142,000.00
₩1,160,000.00
2026-10-01
₩1,139,000.00
-23000.00
-2.02%
₩1,518,466.29
₩1,116,000.00
₩1,160,000.00
₩1,095,000.00
₩1,155,000.00
2026-09-30
₩1,118,000.00
+30000.00
+2.68%
₩1,549,760.85
₩1,148,000.00
₩1,163,000.00
₩1,119,000.00
₩1,139,000.00
2026-09-29
₩1,100,000.00
-4000.00
-0.36%
₩1,509,261.87
₩1,096,000.00
₩1,121,000.00
₩1,087,000.00
₩1,118,000.00
2026-09-28
₩1,190,000.00
+11000.00
+0.92%
₩1,514,770.13
₩1,201,000.00
₩1,201,000.00
₩1,093,000.00
₩1,100,000.00
2026-09-23
₩1,133,000.00
+46000.00
+4.06%
₩1,500,896.29
₩1,179,000.00
₩1,196,000.00
₩1,161,000.00
₩1,190,000.00
2026-09-22
₩1,127,000.00
+62000.00
+5.50%
₩1,442,337.15
₩1,189,000.00
₩1,189,000.00
₩1,130,000.00
₩1,133,000.00
2026-09-21
₩1,079,000.00
+8000.00
+0.74%
₩1,367,126.97
₩1,087,000.00
₩1,137,000.00
₩1,080,000.00
₩1,127,000.00
2026-09-18
₩1,008,000.00
+46000.00
+4.56%
₩1,357,065.32
₩1,054,000.00
₩1,083,000.00
₩1,036,000.00
₩1,079,000.00
2026-09-17
₩1,020,000.00
+1000.00
+0.10%
₩1,297,838.56
₩1,021,000.00
₩1,043,000.00
₩1,001,000.00
₩1,008,000.00
2026-09-16
₩1,000,000.00
+2000.00
+0.20%
₩1,296,567.42
₩1,002,000.00
₩1,020,000.00
₩988,000.00
₩1,020,000.00
2026-09-15
₩1,000,000.00
-3000.00
-0.30%
₩1,293,979.46
₩997,000.00
₩1,022,000.00
₩994,000.00
₩1,000,000.00
2026-09-14
₩1,089,000.00
-55000.00
-5.05%
₩1,297,873.08
₩1,034,000.00
₩1,035,000.00
₩998,000.00
₩1,000,000.00
2026-09-11
₩1,135,000.00
-55000.00
-4.85%
₩1,366,908.88
₩1,080,000.00
₩1,095,000.00
₩1,066,000.00
₩1,089,000.00
2026-09-10
₩1,138,000.00
+6000.00
+0.53%
₩1,436,519.98
₩1,144,000.00
₩1,159,000.00
₩1,095,000.00
₩1,135,000.00
2026-09-09
₩1,131,000.00
-2000.00
-0.18%
₩1,428,985.78
₩1,129,000.00
₩1,157,000.00
₩1,111,000.00
₩1,138,000.00
2026-09-08
₩1,125,000.00
+8000.00
+0.71%
₩1,431,517.20
₩1,133,000.00
₩1,199,000.00
₩1,117,000.00
₩1,131,000.00
2026-09-07
₩1,041,000.00
+64000.00
+6.15%
₩1,421,409.40
₩1,105,000.00
₩1,125,000.00
₩1,089,000.00
₩1,125,000.00
2026-09-04
₩981,000.00
+9000.00
+0.92%
₩1,339,083.43
₩990,000.00
₩1,049,000.00
₩983,000.00
₩1,041,000.00
2026-09-03
₩982,000.00
+20000.00
+2.04%
₩1,326,909.94
₩1,002,000.00
₩1,006,000.00
₩947,000.00
₩981,000.00
2026-09-02
₩1,067,000.00
-47000.00
-4.40%
₩1,300,424.71
₩1,020,000.00
₩1,024,000.00
₩982,000.00
₩982,000.00
2026-09-01
₩1,037,000.00
-21000.00
-2.03%
₩1,360,346.24
₩1,016,000.00
₩1,072,000.00
₩1,010,000.00
₩1,067,000.00
2026-08-31
₩1,028,000.00
-35000.00
-3.40%
₩1,388,463.64
₩993,000.00
₩1,046,000.00
₩974,000.00
₩1,037,000.00
2026-08-28
₩1,068,000.00
-5000.00
-0.47%
₩1,437,402.44
₩1,063,000.00
₩1,075,000.00
₩1,026,000.00
₩1,028,000.00
2026-08-27
₩1,058,000.00
+45000.00
+4.25%
₩1,444,163.50
₩1,103,000.00
₩1,111,000.00
₩1,050,000.00
₩1,068,000.00
2026-08-26
₩1,060,000.00
+0.00
+0.00%
₩1,385,244.77
₩1,060,000.00
₩1,079,000.00
₩1,027,000.00
₩1,058,000.00
2026-08-25
₩1,076,000.00
-42000.00
-3.90%
₩1,385,244.77
₩1,034,000.00
₩1,060,000.00
₩999,000.00
₩1,060,000.00
2026-08-24
₩1,123,000.00
+17000.00
+1.51%
₩1,441,511.97
₩1,140,000.00
₩1,145,000.00
₩1,061,000.00
₩1,076,000.00
2026-08-21
₩1,123,000.00
-27000.00
-2.40%
₩1,420,015.74
₩1,096,000.00
₩1,141,000.00
₩1,078,000.00
₩1,123,000.00
2026-08-20
₩1,004,000.00
+78000.00
+7.77%
₩1,454,997.88
₩1,082,000.00
₩1,131,000.00
₩1,029,000.00
₩1,123,000.00
2026-08-19
₩1,135,000.00
-105000.00
-9.25%
₩1,350,108.94
₩1,030,000.00
₩1,042,000.00
₩993,000.00
₩1,004,000.00
2026-08-18
₩1,154,000.00
+46000.00
+3.99%
₩1,487,741.40
₩1,200,000.00
₩1,265,000.00
₩1,117,000.00
₩1,135,000.00
2026-08-14
₩1,117,000.00
+65000.00
+5.82%
₩1,430,711.31
₩1,182,000.00
₩1,183,000.00
₩1,130,000.00
₩1,154,000.00
2026-08-13
₩1,024,000.00
+77000.00
+7.52%
₩1,352,034.29
₩1,101,000.00
₩1,150,000.00
₩1,082,000.00
₩1,117,000.00
2026-08-12
₩945,000.00
+37000.00
+3.92%
₩1,257,477.85
₩982,000.00
₩1,053,000.00
₩970,000.00
₩1,024,000.00
2026-08-11
₩949,000.00
-20000.00
-2.11%
₩1,210,098.34
₩929,000.00
₩960,000.00
₩901,000.00
₩945,000.00
2026-08-10
₩939,000.00
+12000.00
+1.28%
₩1,236,149.98
₩951,000.00
₩977,000.00
₩931,000.00
₩949,000.00
2026-08-07
₩970,000.00
+26000.00
+2.68%
₩1,220,551.87
₩996,000.00
₩1,006,000.00
₩925,000.00
₩939,000.00
2026-08-06
₩1,119,000.00
-31000.00
-2.77%
₩1,188,690.07
₩1,088,000.00
₩1,088,000.00
₩968,000.00
₩970,000.00
2026-08-05
₩1,060,000.00
+83000.00
+7.83%
₩1,222,559.00
₩1,143,000.00
₩1,157,000.00
₩1,105,000.00
₩1,119,000.00
2026-08-04
₩1,025,000.00
+71000.00
+6.93%
₩1,133,781.75
₩1,096,000.00
₩1,096,000.00
₩999,000.00
₩1,060,000.00
2026-08-03
₩1,038,000.00
+32000.00
+3.08%
₩1,060,334.21
₩1,070,000.00
₩1,070,000.00
₩992,000.00
₩1,025,000.00
2026-07-31
₩799,000.00
+196000.00
+24.53%
₩1,028,623.28
₩995,000.00
₩1,038,000.00
₩944,000.00
₩1,038,000.00
2026-07-30
₩850,000.00
-24000.00
-2.82%
₩826,000.00
₩826,000.00
₩872,000.00
₩770,000.00
₩799,000.00
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2026-07-29
(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 %
2026-07
₩850,000.00
₩1,028,623.28
+178623.28
+21.01%
2026-08
₩1,028,623.28
₩1,388,463.64
+359840.36
+34.98%
2026-09
₩1,388,463.64
₩1,549,760.85
+161297.21
+11.62%
2026-10
₩1,549,760.85
₩1,271,717.68
-278043.17
-17.94%
📅 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 2021-11-29 to 2026-10-23 (1,190 trading days), $1 invested
overnight-only would now be worth $2.49;
$1 invested intraday-only would be worth $4.10.
402340'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 402340, 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.