Prothena Corporation (PRTA)
NASDAQ: PRTA
· Real-Time Price · USD
9.92
0.16 (1.64%)
At close: Oct 01, 2025, 3:59 PM
9.66
-2.62%
After-hours: Oct 01, 2025, 07:56 PM EDT
PRTA Option Overview
Overview for all option chains of PRTA. As of October 01, 2025, PRTA options have an IV of 189.44% and an IV rank of 109.61%. The volume is 1,939 contracts, which is 343.79% of average daily volume of 564 contracts. The volume put-call ratio is 0.01, indicating a bullish sentiment in the market.
Implied Volatility
Implied Volatility (30d)
189.44%IV Rank
100%Historical Volatility
45.4%IV Low
80.74% on Oct 07, 2024IV High
179.91% on Sep 29, 2025Open Interest (OI)
Today's Open Interest
27,854Put-Call Ratio
1.36Put Open Interest
16,055Call Open Interest
11,799Open Interest Avg (30-day)
23,660Today vs Open Interest Avg (30-day)
117.73%Option Volume
Today's Volume
1,939Put-Call Ratio
0.01Put Volume
19Call Volume
1,920Volume Avg (30-day)
564Today vs Volume Avg (30-day)
343.79%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 |
| Oct 17, 2025 | 2 | 0 | 0 | 1,170 | 1,182 | 1.01 | 189.44% | 7.5 |
| Nov 21, 2025 | 0 | 0 | 0 | 147 | 704 | 4.79 | 155.03% | 9 |
| Dec 19, 2025 | 10 | 7 | 0.7 | 1,476 | 7,193 | 4.87 | 108.11% | 7.5 |
| Jan 16, 2026 | 947 | 7 | 0.01 | 7,116 | 6,924 | 0.97 | 82.16% | 7.5 |
| Mar 20, 2026 | 7 | 5 | 0.71 | 1,788 | 52 | 0.03 | 73.47% | 7.5 |
| Jan 15, 2027 | 953 | 0 | 0 | 95 | 0 | 0 | 102.65% | 3 |
| Jan 21, 2028 | 1 | 0 | 0 | 7 | 0 | 0 | 81.58% | 3 |