CSTM Short Volume
Constellium SE (CSTM) operates in the Basic Materials sector, specifically the Aluminum industry, with a market capitalization near $4.71B, listed on NYSE, employing roughly 12,000 people, carrying a beta of 1.54 to the broader market. Constellium SE, together with its subsidiaries, engages in the design, manufacture, and sale of specialty rolled and extruded aluminum products for the packaging, aerospace, and automotive end-markets. Led by Ingrid Joerg, public since 2013-05-23.
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
- 221.6K
- Total Volume
- 598.3K
- Short %
- 37.04%
- 30-Day Avg Short %
- 43.95%
Showing 30 days of FINRA short volume data for Constellium SE.
Learn how short volume is reported and how to read the data →
Frequently asked CSTM short volume questions
- What is the daily CSTM short volume?
- As of May 15, 2026, Constellium SE (CSTM) short volume is 221.6K shares against 598.3K total reported volume, or 37.04% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is CSTM 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 CSTM 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.