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
2026-06-15
$245.16
$247.80
$244.73
$246.02
$238.55
+6.61
+2.77%
$245.16
2026-06-16
$248.00
$249.51
$245.45
$246.00
$246.02
+1.98
+0.80%
$247.14
2026-06-17
$244.90
$245.91
$236.00
$237.50
$246.00
-1.10
-0.45%
$246.03
2026-06-18
$240.12
$245.73
$236.02
$244.39
$237.50
+2.62
+1.10%
$248.75
2026-06-22
$240.08
$242.00
$232.24
$232.79
$244.39
-4.31
-1.76%
$244.36
2026-06-23
$232.55
$236.87
$232.00
$234.11
$232.79
-0.24
-0.10%
$244.11
2026-06-25
$231.93
$232.32
$225.56
$227.01
$234.11
-2.18
-0.93%
$241.83
2026-06-26
$227.39
$232.95
$226.12
$232.69
$227.01
+0.38
+0.17%
$242.24
2026-06-29
$234.25
$249.71
$233.80
$240.14
$232.69
+1.56
+0.67%
$243.86
2026-06-30
$237.43
$241.54
$237.17
$238.34
$240.14
-2.71
-1.13%
$241.11
2026-07-01
$239.98
$244.90
$234.90
$241.70
$238.34
+1.64
+0.69%
$242.76
2026-07-02
$241.60
$246.72
$241.08
$242.67
$241.70
-0.10
-0.04%
$242.67
2026-07-07
$247.32
$248.91
$242.70
$245.98
$242.67
+4.65
+1.92%
$247.32
2026-07-08
$244.27
$244.80
$240.52
$243.62
$245.98
-1.71
-0.70%
$245.60
2026-07-09
$239.82
$247.46
$238.25
$247.04
$243.62
-3.80
-1.56%
$241.77
2026-07-10
$249.55
$251.03
$244.41
$245.34
$247.04
+2.51
+1.02%
$244.22
2026-07-13
$244.68
$249.65
$244.23
$247.31
$245.34
-0.66
-0.27%
$243.57
2026-07-14
$245.55
$248.56
$243.80
$247.49
$247.31
-1.76
-0.71%
$241.83
2026-07-15
$249.75
$256.48
$249.75
$254.96
$247.49
+2.26
+0.91%
$244.04
2026-07-16
$255.12
$258.08
$248.00
$249.89
$254.96
+0.16
+0.06%
$244.19
2026-07-17
$244.46
$250.24
$243.59
$247.23
$249.89
-5.43
-2.17%
$238.89
2026-07-21
$249.10
$249.34
$246.72
$247.55
$247.23
+1.88
+0.76%
$240.70
2026-07-22
$248.13
$248.45
$242.45
$244.85
$247.55
+0.58
+0.23%
$241.26
2026-07-23
$236.32
$238.35
$232.05
$233.66
$244.85
-8.53
-3.48%
$232.86
2026-07-24
$234.37
$234.95
$231.35
$232.11
$233.66
+0.71
+0.30%
$233.57
2026-07-27
$235.70
$235.89
$230.99
$231.39
$232.11
+3.59
+1.55%
$237.18
2026-07-28
$232.85
$233.11
$228.10
$230.86
$231.39
+1.46
+0.63%
$238.68
2026-07-29
$229.31
$232.82
$226.16
$226.65
$230.86
-1.55
-0.67%
$237.08
2026-07-30
$233.35
$239.82
$231.06
$235.50
$226.65
+6.70
+2.96%
$244.09
2026-07-31
$265.00
$273.23
$262.06
$271.58
$235.50
+29.50
+12.53%
$274.66
2026-08-03
$278.29
$287.16
$278.00
$284.02
$271.58
+6.71
+2.47%
$281.45
2026-08-04
$276.06
$281.07
$275.82
$277.42
$284.02
-7.96
-2.80%
$273.56
2026-08-05
$281.59
$282.79
$270.74
$272.65
$277.42
+4.17
+1.50%
$277.67
2026-08-06
$272.76
$275.48
$271.08
$272.26
$272.65
+0.12
+0.04%
$277.79
2026-08-07
$272.87
$278.31
$272.75
$274.48
$272.26
+0.61
+0.22%
$278.41
2026-08-10
$274.01
$280.14
$273.60
$278.09
$274.48
-0.47
-0.17%
$277.94
2026-08-11
$278.69
$278.84
$271.36
$272.27
$278.09
+0.60
+0.22%
$278.53
2026-08-12
$273.18
$273.46
$267.10
$267.28
$272.27
+0.91
+0.33%
$279.47
2026-08-13
$267.24
$269.58
$264.70
$265.13
$267.28
-0.04
-0.02%
$279.42
2026-08-14
$264.88
$265.81
$262.42
$262.65
$265.13
-0.25
-0.10%
$279.15
2026-08-17
$265.44
$265.75
$258.34
$261.31
$262.65
+2.79
+1.06%
$282.12
2026-08-18
$260.63
$262.18
$257.73
$259.45
$261.31
-0.68
-0.26%
$281.38
2026-08-19
$260.85
$266.40
$258.58
$265.84
$259.45
+1.40
+0.54%
$282.89
2026-08-20
$263.16
$263.84
$259.59
$260.11
$265.84
-2.68
-1.01%
$280.04
2026-08-21
$260.74
$261.08
$257.04
$258.63
$260.11
+0.63
+0.24%
$280.72
2026-08-24
$259.52
$263.31
$259.05
$262.07
$258.63
+0.89
+0.34%
$281.69
2026-08-25
$262.51
$263.87
$259.83
$261.06
$262.07
+0.44
+0.17%
$282.16
2026-08-26
$261.27
$262.05
$258.24
$260.28
$261.06
+0.21
+0.08%
$282.39
2026-08-27
$259.23
$259.66
$255.02
$256.26
$260.28
-1.05
-0.40%
$281.25
2026-08-28
$258.32
$267.56
$257.78
$266.43
$256.26
+2.06
+0.80%
$283.51
2026-08-31
$263.82
$264.36
$257.15
$259.77
$266.43
-2.61
-0.98%
$280.74
2026-09-01
$254.83
$255.82
$251.93
$254.92
$259.77
-4.94
-1.90%
$275.40
2026-09-02
$254.25
$256.24
$253.40
$254.98
$254.92
-0.66
-0.26%
$274.68
2026-09-03
$256.20
$259.50
$256.00
$258.90
$254.98
+1.22
+0.48%
$276.00
2026-09-04
$259.07
$261.12
$255.29
$258.51
$258.90
+0.17
+0.07%
$276.18
2026-09-08
$256.68
$257.99
$254.75
$256.97
$258.51
-1.83
-0.71%
$274.22
2026-09-09
$253.12
$254.62
$250.65
$252.40
$256.97
-3.85
-1.50%
$270.11
2026-09-10
$250.11
$253.15
$249.58
$251.89
$252.40
-2.29
-0.91%
$267.66
2026-09-11
$254.09
$257.59
$253.14
$256.78
$251.89
+2.20
+0.87%
$270.00
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2026-06-12
(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
$238.55
$241.11
+2.56
+1.07%
2026-07
$241.11
$274.66
+33.56
+13.92%
2026-08
$274.66
$280.74
+6.08
+2.21%
2026-09
$280.74
$270.00
-10.74
-3.83%
🌙 Overnight vs. Intraday Return
Overnight (close→next open) Intraday (open→close)
From 2025-04-23 to 2026-09-04 (341 trading days), $1 invested
overnight-only would now be worth $1.62;
$1 invested intraday-only would be worth $0.88.
AMZN'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 AMZN, with buy/sell triggers plotted right on the chart.