CPRX Short Volume
Catalyst Pharmaceuticals, Inc. (CPRX) operates in the Healthcare sector, specifically the Biotechnology industry, with a market capitalization near $3.81B, listed on NASDAQ, employing roughly 181 people, carrying a beta of 0.72 to the broader market. Catalyst Pharmaceuticals, Inc. Led by Richard John Daly, public since 2006-11-08.
Short volume measures the number of shares sold short on a given day as reported by FINRA. Tracking short volume relative to total volume helps identify unusual bearish sentiment or short-squeeze potential.
- Latest Date
- 2026-05-15
- Short Volume
- 358.4K
- Total Volume
- 730.4K
- Short %
- 49.07%
- 30-Day Avg Short %
- 36.17%
Showing 30 days of FINRA short volume data for Catalyst Pharmaceuticals, Inc..
Learn how short volume is reported and how to read the data →
CPRX most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| CALL | $35.00 | Dec 18, 2026 | 405 | 1.8K | 909.8% | $0.05 | $0.15 |
| CALL | $30.00 | Dec 18, 2026 | 3 | 256 | 226.8% | $1.60 | $1.70 |
Top 2 contracts from the ORATS-sourced nightly scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked CPRX short volume questions
- What is the daily CPRX short volume?
- As of May 15, 2026, Catalyst Pharmaceuticals, Inc. (CPRX) short volume is 358.4K shares against 730.4K total reported volume, or 49.07% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is CPRX short volume reported?
- FINRA publishes the Daily Short Sale Volume File for trades reported to FINRA TRFs and the FINRA/Nasdaq ADF on a T+1 basis. The headline figure is the count of shares that printed at the short-sale or short-exempt tick across all reporting venues for the symbol; each exchange separately publishes its own daily short-sale data file.
- What does CPRX short volume tell options traders?
- Daily short-sale flow is one input that helps disambiguate dealer-hedging activity from directional bear flow when the chain shows fresh customer call inventory. It is not a clean MM-only proxy: the headline number mixes directional shorting, options-MM delta-hedging, ETF-creation arbitrage, and convertible-arb hedging. Cross-check against gamma-exposure and OI changes for a cleaner read.