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
$63.15
-1.47
-2.33%
$61.68
$61.68
$63.28
$61.06
$61.82
2026-07-21
$61.82
-2.31
-3.74%
$59.38
$59.51
$60.83
$58.61
$59.66
2026-07-22
$59.66
-0.29
-0.49%
$59.09
$59.37
$59.86
$57.74
$58.07
2026-07-23
$58.07
-0.93
-1.60%
$58.14
$57.14
$58.43
$56.27
$57.02
2026-07-24
$57.02
+0.23
+0.41%
$58.38
$57.26
$57.46
$53.85
$54.07
2026-07-27
$54.07
+0.77
+1.42%
$59.21
$54.84
$57.07
$54.39
$55.63
2026-07-28
$55.63
-0.80
-1.44%
$58.36
$54.83
$55.85
$53.34
$55.80
2026-07-29
$55.80
-0.77
-1.37%
$57.56
$55.04
$56.23
$54.16
$54.49
2026-07-30
$54.49
+1.48
+2.71%
$59.12
$55.97
$58.08
$54.52
$57.92
2026-07-31
$57.92
-0.07
-0.12%
$59.05
$57.85
$59.49
$54.71
$54.82
2026-08-03
$54.82
+0.10
+0.19%
$59.16
$54.92
$58.00
$52.66
$55.14
2026-08-04
$55.14
+1.70
+3.08%
$60.98
$56.84
$58.34
$55.88
$56.99
2026-08-05
$56.99
+1.01
+1.77%
$62.07
$58.00
$59.45
$55.58
$56.26
2026-08-06
$56.26
+1.28
+2.28%
$63.48
$57.54
$58.99
$53.71
$53.86
2026-08-07
$53.86
+0.93
+1.73%
$64.58
$54.79
$59.41
$54.62
$59.17
2026-08-10
$59.17
+0.58
+0.98%
$65.21
$59.75
$60.77
$58.41
$59.81
2026-08-11
$59.81
+0.40
+0.67%
$65.65
$60.21
$61.40
$58.60
$60.57
2026-08-12
$60.57
+0.01
+0.02%
$65.66
$60.58
$64.25
$59.29
$63.67
2026-08-13
$63.67
+0.13
+0.20%
$65.79
$63.80
$65.33
$62.33
$63.65
2026-08-14
$63.65
-0.76
-1.19%
$65.01
$62.89
$63.78
$60.82
$63.32
2026-08-17
$63.32
+1.46
+2.30%
$66.50
$64.78
$65.53
$62.91
$64.46
2026-08-18
$64.46
-1.42
-2.20%
$65.04
$63.04
$64.37
$62.13
$62.96
2026-08-19
$62.96
+53.06
+84.28%
$119.85
$116.02
$176.66
$114.46
$174.38
2026-08-20
$174.38
-24.27
-13.92%
$103.17
$150.11
$155.00
$128.61
$133.32
2026-08-21
$133.32
-0.82
-0.62%
$102.53
$132.50
$159.47
$132.43
$145.13
2026-08-24
$145.13
-2.43
-1.67%
$100.82
$142.70
$145.49
$130.02
$138.89
2026-08-25
$138.89
+4.61
+3.32%
$104.16
$143.50
$161.37
$141.21
$158.83
2026-08-26
$158.83
-4.31
-2.71%
$101.34
$154.52
$156.13
$145.11
$149.66
2026-08-27
$149.66
-5.46
-3.65%
$97.64
$144.20
$148.59
$138.54
$142.77
2026-08-28
$142.77
-5.71
-4.00%
$93.73
$137.06
$138.80
$133.33
$137.99
2026-08-31
$137.99
-3.89
-2.82%
$91.09
$134.10
$144.20
$133.85
$140.34
2026-09-01
$140.34
-0.38
-0.27%
$90.84
$139.96
$154.70
$138.09
$154.27
2026-09-02
$154.27
-2.79
-1.81%
$89.20
$151.48
$156.42
$146.54
$150.81
2026-09-03
$150.81
-4.87
-3.23%
$86.32
$145.94
$150.20
$142.78
$148.87
2026-09-04
$148.87
+4.13
+2.77%
$88.72
$153.00
$154.03
$141.52
$145.55
2026-09-08
$145.55
+0.43
+0.30%
$88.98
$145.98
$147.50
$139.70
$140.33
2026-09-09
$140.33
-0.04
-0.02%
$88.96
$140.29
$143.94
$135.54
$135.61
2026-09-10
$135.61
-0.75
-0.55%
$88.47
$134.86
$137.13
$130.38
$136.62
2026-09-11
$136.62
+1.47
+1.08%
$89.42
$138.09
$149.71
$135.01
$143.97
2026-09-14
$143.97
+1.03
+0.72%
$90.06
$145.00
$147.34
$139.03
$146.69
2026-09-15
$146.69
-0.69
-0.47%
$89.64
$146.00
$148.70
$141.16
$143.77
2026-09-16
$143.77
+1.49
+1.04%
$90.56
$145.26
$148.93
$142.30
$145.62
2026-09-17
$145.62
+6.88
+4.72%
$94.84
$152.50
$161.96
$149.50
$158.07
2026-09-18
$158.07
+0.28
+0.18%
$95.01
$158.35
$159.79
$150.26
$154.04
2026-09-21
$154.04
+7.01
+4.55%
$99.34
$161.05
$176.86
$159.06
$172.94
2026-09-22
$172.94
-4.44
-2.57%
$96.79
$168.50
$187.20
$168.30
$182.56
2026-09-23
$182.56
+0.76
+0.42%
$97.19
$183.32
$192.31
$181.30
$182.11
2026-09-24
$182.11
-1.51
-0.83%
$96.39
$180.60
$195.71
$180.39
$194.82
2026-09-25
$194.82
+0.53
+0.27%
$96.64
$195.34
$202.67
$192.51
$198.88
2026-09-28
$198.88
-3.72
-1.87%
$94.83
$195.16
$199.82
$189.10
$197.28
2026-09-29
$197.28
+0.33
+0.17%
$94.99
$197.61
$208.90
$190.00
$203.46
2026-09-30
$203.46
-16.91
-8.31%
$87.10
$186.55
$196.83
$184.58
$192.57
2026-10-01
$192.57
-5.96
-3.09%
$84.40
$186.61
$201.00
$186.01
$188.94
2026-10-02
$188.94
+1.32
+0.70%
$84.99
$190.26
$193.72
$183.28
$190.01
2026-10-05
$190.01
+1.40
+0.74%
$85.62
$191.41
$205.76
$185.90
$203.21
2026-10-06
$203.21
-1.12
-0.55%
$85.15
$202.09
$212.19
$186.64
$187.46
2026-10-07
$187.46
-4.45
-2.37%
$83.13
$183.01
$197.65
$182.51
$196.48
2026-10-08
$196.48
-0.05
-0.03%
$83.10
$196.43
$199.92
$192.73
$197.00
2026-10-09
$197.00
+2.10
+1.06%
$83.99
$199.10
$225.00
$197.17
$225.00
📈 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
$63.15
$59.05
-4.10
-6.50%
2026-08
$59.05
$91.09
+32.04
+54.27%
2026-09
$91.09
$87.10
-3.99
-4.38%
2026-10
$87.10
$83.99
-3.11
-3.57%
📅 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 2018-12-07 to 2026-10-09 (1,962 trading days), $1 invested
overnight-only would now be worth $5.72;
$1 invested intraday-only would be worth $2.11.
MRNA'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 MRNA, with buy/sell triggers plotted right on the chart.