PTGX: Protagonist Therapeutics Inc.

As of Friday, August 21st, 2026

$ 154.32

+3.63 +2.41%

Open: 152.10
High: 154.95
Low: 150.82
Volume: 402,512
Previous Close on Thursday, August 20th, 2026

$ 150.69

-4.25 -2.74%

Open: 152.45
High: 155.25
Low: 148.28
Volume: 518,412

Historical Data

Date Open High Low Close Volume Chg %Chg
2026-08-21 152.10 154.95 150.82 154.32 402,512 +3.63 +2.41
2026-08-20 152.45 155.25 148.28 150.69 518,412 -4.25 -2.74
2026-08-19 160.81 160.81 154.22 154.94 778,103 -2.40 -1.53
2026-08-18 157.96 160.00 156.81 157.34 399,525 -1.28 -0.81
2026-08-17 155.11 158.95 153.60 158.62 431,597 +3.52 +2.27
2026-08-14 150.23 155.53 149.17 155.10 426,255 +3.68 +2.43
2026-08-13 153.15 154.99 150.92 151.42 384,545 -0.59 -0.39
2026-08-12 148.21 152.70 147.33 152.01 41,632 +3.72 +2.51
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Metrics and Technicals

Period High Low Chg %Chg Max Drawdown SMA
Peak Trough %Loss
Period High Low Chg %Chg MDD SMA
5D 160.81
On 2026-08-19		 148.28
On 2026-08-20		 -0.78 -0.50 160.81
On 2026-08-19		 148.28
On 2026-08-20		 -7.79 155.18
10D 160.81
On 2026-08-19		 147.33
On 2026-08-12		 8.45 5.79 160.81
On 2026-08-19		 148.28
On 2026-08-20		 -7.79 153.27
20D 160.81
On 2026-08-19		 130.63
On 2026-07-30		 18.21 13.38 160.81
On 2026-08-19		 148.28
On 2026-08-20		 -7.79 145.54
WTD 160.81
On 2026-08-19		 148.28
On 2026-08-20		 -0.78 -0.50 160.81
On 2026-08-19		 148.28
On 2026-08-20		 -7.79 155.18
MTD 160.81
On 2026-08-19		 131.68
On 2026-08-03		 17.68 12.94 160.81
On 2026-08-19		 148.28
On 2026-08-20		 -7.79 148.68
As of Friday, August 21st, 2026
 
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53,277.01 +517.80 +0.98 420,929,349
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VIX

CBOE Volatility Index

15.16 -0.83 -5.19
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CBOE S&P 500 One-Year Volatility Index

22.65 -0.22 -0.96
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CBOE S&P 500 6-Month Volatility Index

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PTGX

Protagonist Therapeutics Inc.

154.32 +3.63 +2.41 402,512