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
2026-07-17
$168.92
+3.02
+1.79%
$171.94
$171.94
$172.65
$168.91
$170.06
2026-07-21
$170.06
-4.75
-2.79%
$167.14
$165.31
$166.60
$163.07
$163.39
2026-07-22
$163.39
+0.35
+0.21%
$167.50
$163.74
$166.82
$163.48
$166.06
2026-07-23
$166.06
+0.12
+0.07%
$167.62
$166.18
$168.23
$163.59
$164.65
2026-07-24
$164.65
+1.88
+1.14%
$169.53
$166.53
$169.49
$166.42
$166.67
2026-07-27
$166.67
-0.25
-0.15%
$169.28
$166.42
$168.19
$165.58
$166.74
2026-07-28
$166.74
+2.80
+1.68%
$172.12
$169.54
$178.60
$169.16
$171.50
2026-07-29
$171.50
+3.46
+2.02%
$175.59
$174.96
$180.37
$172.59
$179.26
2026-07-30
$179.26
-1.96
-1.09%
$173.67
$177.30
$179.47
$172.82
$174.46
2026-07-31
$174.46
-1.77
-1.01%
$171.91
$172.69
$174.17
$170.96
$173.36
2026-08-03
$173.36
+1.31
+0.76%
$173.21
$174.67
$175.16
$171.79
$173.00
2026-08-04
$173.00
-2.50
-1.45%
$170.71
$170.50
$175.55
$169.03
$175.25
2026-08-05
$175.25
-1.34
-0.76%
$169.40
$173.91
$173.91
$162.50
$168.07
2026-08-06
$168.07
+1.62
+0.96%
$171.03
$169.69
$172.38
$167.39
$171.20
2026-08-07
$171.20
-0.69
-0.40%
$170.34
$170.51
$173.77
$170.51
$172.54
2026-08-10
$172.54
-1.28
-0.74%
$169.08
$171.26
$171.49
$168.72
$169.11
2026-08-11
$169.11
-0.61
-0.36%
$168.47
$168.50
$171.62
$168.50
$169.55
2026-08-12
$169.55
-0.33
-0.19%
$168.14
$169.22
$172.39
$168.93
$170.43
2026-08-13
$170.43
+0.92
+0.54%
$169.05
$171.35
$175.00
$171.25
$174.19
2026-08-14
$174.19
+0.07
+0.04%
$169.12
$174.26
$176.59
$173.77
$175.58
2026-08-17
$175.58
-0.66
-0.38%
$168.48
$174.92
$175.08
$170.15
$172.23
2026-08-18
$172.23
+2.63
+1.53%
$171.05
$174.86
$175.33
$172.25
$172.33
2026-08-19
$172.33
+0.67
+0.39%
$171.72
$173.00
$175.76
$172.62
$174.49
2026-08-20
$174.49
+2.54
+1.46%
$174.22
$177.03
$177.75
$174.96
$175.72
2026-08-21
$175.72
+0.24
+0.14%
$174.46
$175.96
$178.02
$174.41
$175.80
2026-08-24
$175.80
+0.66
+0.38%
$175.12
$176.46
$178.86
$175.90
$178.39
2026-08-25
$178.39
-0.54
-0.31%
$174.58
$177.84
$178.99
$177.15
$178.57
2026-08-26
$178.57
+1.43
+0.80%
$175.98
$180.00
$180.98
$175.36
$175.73
2026-08-27
$175.73
-1.54
-0.88%
$174.44
$174.19
$176.11
$173.50
$174.16
2026-08-28
$174.16
+0.38
+0.22%
$174.82
$174.54
$177.32
$174.22
$176.23
2026-08-31
$176.23
-0.33
-0.19%
$174.49
$175.90
$176.86
$173.52
$175.70
2026-09-01
$175.70
+0.20
+0.11%
$174.69
$175.90
$178.24
$174.62
$176.02
2026-09-02
$176.02
-0.12
-0.07%
$174.57
$175.90
$176.38
$171.73
$172.92
2026-09-03
$172.92
+2.01
+1.16%
$176.60
$174.93
$179.05
$174.88
$177.75
2026-09-04
$177.75
-1.36
-0.77%
$175.25
$176.39
$179.39
$175.35
$175.85
2026-09-08
$175.85
+2.49
+1.42%
$177.73
$178.34
$179.19
$174.22
$175.73
2026-09-09
$175.73
-0.25
-0.14%
$177.48
$175.48
$176.45
$174.60
$175.43
2026-09-10
$175.43
+0.75
+0.43%
$178.24
$176.18
$176.84
$171.75
$172.98
2026-09-11
$172.98
+1.61
+0.93%
$179.90
$174.59
$178.54
$174.34
$177.85
2026-09-14
$177.85
+1.28
+0.72%
$181.19
$179.13
$179.47
$174.85
$176.94
2026-09-15
$176.94
-0.85
-0.48%
$180.32
$176.09
$178.70
$174.69
$177.71
2026-09-16
$177.71
-0.32
-0.18%
$179.99
$177.39
$179.80
$176.34
$176.39
2026-09-17
$176.39
+0.99
+0.56%
$181.01
$177.38
$177.38
$174.75
$175.58
2026-09-18
$175.58
-2.38
-1.36%
$178.55
$173.20
$175.57
$172.82
$173.98
2026-09-21
$173.98
-0.15
-0.09%
$178.40
$173.83
$175.46
$173.11
$174.60
2026-09-22
$174.60
-0.30
-0.17%
$178.09
$174.30
$177.04
$172.84
$175.25
2026-09-23
$175.25
-0.68
-0.39%
$177.40
$174.57
$175.97
$170.49
$170.78
2026-09-24
$170.78
+0.00
+0.00%
$177.40
$170.78
$171.09
$166.54
$167.26
2026-09-25
$167.26
-0.31
-0.19%
$177.07
$166.95
$169.20
$166.42
$169.03
2026-09-28
$169.03
-0.13
-0.08%
$176.94
$168.90
$169.85
$166.97
$168.00
2026-09-29
$168.00
-0.75
-0.45%
$176.15
$167.25
$169.22
$166.07
$167.35
2026-09-30
$167.35
+0.22
+0.13%
$176.38
$167.57
$167.73
$163.34
$163.69
2026-10-01
$163.69
-0.07
-0.04%
$176.30
$163.62
$164.51
$160.94
$161.06
2026-10-02
$161.06
+1.16
+0.72%
$177.57
$162.22
$165.23
$160.85
$162.20
2026-10-05
$162.20
-0.42
-0.26%
$177.11
$161.78
$162.67
$160.32
$162.26
2026-10-06
$162.26
+0.60
+0.37%
$177.77
$162.86
$165.24
$162.42
$164.78
2026-10-07
$164.78
+0.66
+0.40%
$178.48
$165.44
$168.30
$164.57
$166.18
2026-10-08
$166.18
+0.66
+0.40%
$179.19
$166.84
$167.41
$163.66
$166.73
2026-10-09
$166.73
+10.18
+6.11%
$190.13
$176.91
$182.52
$175.02
$182.24
📈 Overnight % Gain Trend
Cumulative overnight-only return, indexed to 0% on 2026-07-16
(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
$168.92
$171.91
+2.99
+1.77%
2026-08
$171.91
$174.49
+2.58
+1.50%
2026-09
$174.49
$176.38
+1.89
+1.08%
2026-10
$176.38
$190.13
+13.75
+7.80%
📅 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 2016-01-04 to 2026-10-09 (2,700 trading days), $1 invested
overnight-only would now be worth $1.77;
$1 invested intraday-only would be worth $1.38.
AMT'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 AMT, with buy/sell triggers plotted right on the chart.