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Protagonist Therapeutics PTGX

US equityMarket cap rank #1553
$140.63 +$0.57 (+0.41%)
Market closed · Oct 5, 8:20 pm ET · Last extended-hours $140.63 0.00%
Open$139.96
Prev close$140.06
Day range$138.08 – $142.51
Volume1.27M
Market cap$9.10B
P/E (TTM)136.5
Dividend yield–

Average implied volatility across the listed chain right now: 77%. Implied volatility measures how big a price swing the options market is pricing in — there is no fixed “normal” level, it varies a lot by stock.

Calls

ExpiryStrikeLastBid/AskVolumeOpen interestIV
16 Oct 2026 $140.00 $5.50 $3.50/$8.00 0 26 55%
16 Oct 2026 $145.00 $3.50 $1.35/$6.00 2 35 56%
16 Oct 2026 $135.00 $8.18 $6.70/$11.00 0 36 58%
16 Oct 2026 $150.00 $2.77 $1.75/$4.90 0 137 70%
16 Oct 2026 $130.00 $12.39 $10.20/$15.00 0 7 61%
16 Oct 2026 $155.00 $2.50 $0.00/$4.90 0 9 74%
16 Oct 2026 $125.00 $16.61 $14.70/$19.00 0 2 64%
16 Oct 2026 $160.00 $2.23 $0.00/$4.90 0 7 83%
16 Oct 2026 $120.00 $20.84 $19.20/$23.50 0 15 67%
16 Oct 2026 $165.00 $1.96 $0.00/$1.50 0 32 91%
16 Oct 2026 $115.00 $25.39 $23.90/$28.50 0 4 76%
16 Oct 2026 $170.00 $1.69 $0.00/$4.90 0 2 97%
16 Oct 2026 $110.00 $30.16 $29.20/$33.50 0 2 95%
16 Oct 2026 $175.00 $1.47 $0.00/$4.90 0 1 102%
16 Oct 2026 $105.00 $35.07 $33.90/$38.50 0 12 103%

Puts

ExpiryStrikeLastBid/AskVolumeOpen interestIV
16 Oct 2026 $140.00 $5.57 $2.50/$7.10 0 33 54%
16 Oct 2026 $145.00 $8.11 $5.50/$9.70 0 2 53%
16 Oct 2026 $135.00 $3.25 $0.60/$5.30 0 12 56%
16 Oct 2026 $150.00 $12.83 $9.00/$13.60 0 8 55%
16 Oct 2026 $130.00 $2.47 $0.00/$4.80 0 20 70%
16 Oct 2026 $155.00 $17.55 $13.00/$17.70 0 0 55%
16 Oct 2026 $125.00 $1.68 $0.00/$4.90 0 26 75%
16 Oct 2026 $160.00 $22.28 $17.20/$22.00 0 10 49%
16 Oct 2026 $120.00 $0.90 $0.00/$4.90 0 1 75%
16 Oct 2026 $165.00 $27.00 $22.00/$26.70 0 0 0%
16 Oct 2026 $115.00 $0.44 $0.00/$4.90 0 1 76%
16 Oct 2026 $170.00 $31.72 $27.00/$31.80 0 0 55%
16 Oct 2026 $110.00 $0.19 $0.00/$4.90 0 2 76%
16 Oct 2026 $175.00 $36.49 $32.00/$36.80 0 0 62%
16 Oct 2026 $105.00 $0.08 $0.00/$4.90 0 2 77%

Open interest = contracts currently outstanding (not yet closed out). Higher open interest generally means a strike/expiry is more actively traded and easier to get in and out of.

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