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 Delta Exposure By Expiry
The total Delta Exposure (DEX) for PRTA across all expirations shows 24,495.78 net shares that market makers must hedge, with 56,265.28 from calls and 31,769.5 from puts. The put-call delta ratio of 0.56 suggests neutral market maker positioning. The largest delta concentration at Sep 19, 25 with 15,427.21 net DEX represents significant hedging pressure that may cap upside moves. The nearest expiration on Sep 19, 25 carries positive delta requiring market makers to short shares, potentially creating resistance.
PRTA DEX Table
| Expiry Date | Call Delta | Put Delta | Net Delta | P/C Delta |
|---|---|---|---|---|
| Sep 19, 25 | 25,682.04 | -10,254.83 | 15,427.21 | 0.40 |
| Oct 17, 25 | 0 | -5.5 | -5.5 | n/a |
| Dec 19, 25 | 4,812.62 | -3,309.59 | 1,503.03 | 0.69 |
| Jan 16, 26 | 23,865.74 | -18,163.1 | 5,702.64 | 0.76 |
| Mar 20, 26 | 1,904.88 | -36.48 | 1,868.4 | 0.02 |