HALO Short Volume
Halozyme Therapeutics, Inc. (HALO) operates in the Healthcare sector, specifically the Biotechnology industry, with a market capitalization near $8.31B, listed on NASDAQ, employing roughly 350 people, carrying a beta of 0.88 to the broader market. Halozyme Therapeutics, Inc. Led by Helen I. Torley, public since 2004-03-16.
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
- 420.8K
- Total Volume
- 716.9K
- Short %
- 58.69%
- 30-Day Avg Short %
- 63.29%
Showing 30 days of FINRA short volume data for Halozyme Therapeutics, Inc..
Learn how short volume is reported and how to read the data →
HALO most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| PUT | $65.00 | Sep 18, 2026 | 303 | 114 | 36.9% | $4.20 | $4.80 |
Top 1 contracts from the ORATS-sourced nightly scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked HALO short volume questions
- What is the daily HALO short volume?
- As of May 15, 2026, Halozyme Therapeutics, Inc. (HALO) short volume is 420.8K shares against 716.9K total reported volume, or 58.69% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is HALO 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 HALO 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.