MARS Short Volume
Roundhill ETF Trust - Roundhill Space & Technology ETF (MARS) operates in the Financial Services sector, specifically the Asset Management industry, with a market capitalization near $44.9M, listed on CBOE, carrying a beta of 4.86 to the broader market. MARS targets pure-play companies worldwide involved in the space economy and its enabling technologies. public since 2026-03-05.
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
- 2026-09-30
- Short Volume
- 3.0K
- Total Volume
- 9.2K
- Short %
- 32.53%
- 30-Day Avg Short %
- 27.14%
Showing 30 days of FINRA short volume data for Roundhill ETF Trust - Roundhill Space & Technology ETF.
Learn how short volume is reported and how to read the data →
Frequently asked MARS short volume questions
- What is the daily MARS short volume?
- As of Sep 30, 2026, Roundhill ETF Trust - Roundhill Space & Technology ETF (MARS) short volume is 3.0K shares against 9.2K total reported volume, or 32.53% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is MARS 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 MARS 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.