Prothena Corporation (PRTA)
NASDAQ: PRTA
· Real-Time Price · USD
8.24
0.18 (2.23%)
At close: Aug 15, 2025, 3:59 PM
8.20
-0.49%
After-hours: Aug 15, 2025, 05:52 PM EDT
PRTA Option Overview
Overview for all option chains of PRTA. As of August 15, 2025, PRTA options have an IV of 500% and an IV rank of 358.28%. The volume is 1,646 contracts, which is 71.32% of average daily volume of 2,308 contracts. The volume put-call ratio is 25.13, indicating a bearish sentiment in the market.
Implied Volatility
Implied Volatility (30d)
500%IV Rank
358.28%Historical Volatility
49.07%IV Low
80.74% on Oct 07, 2024IV High
197.76% on May 26, 2025Open Interest (OI)
Today's Open Interest
63,120Put-Call Ratio
2.32Put Open Interest
44,085Call Open Interest
19,035Open Interest Avg (30-day)
32,209Today vs Open Interest Avg (30-day)
195.97%Option Volume
Today's Volume
1,646Put-Call Ratio
25.13Put Volume
1,583Call Volume
63Volume Avg (30-day)
2,308Today vs Volume Avg (30-day)
71.32%Option Chain Statistics
This table provides a comprehensive overview of all PRTA options grouped by their expiration dates.
| Expiration | Call Vol | Put Vol | P/C Vol | Call OI | Put OI | P/C OI | Implied Volatility | Max Pain |
| Aug 15, 2025 | 0 | 785 | 0 | 1,860 | 27,601 | 14.84 | 500% | 7.5 |
| Sep 19, 2025 | 44 | 489 | 11.11 | 9,905 | 5,977 | 0.6 | 139.75% | 7.5 |
| Oct 17, 2025 | 0 | 2 | 0 | 0 | 0 | 0 | 94.69% | 2.5 |
| Dec 19, 2025 | 15 | 307 | 20.47 | 924 | 3,642 | 3.94 | 90.36% | 7.5 |
| Jan 16, 2026 | 4 | 0 | 0 | 5,686 | 6,841 | 1.2 | 129.13% | 7.5 |
| Mar 20, 2026 | 0 | 0 | 0 | 660 | 24 | 0.04 | 86.99% | 5 |