CENX Short Volume
Century Aluminum Company (CENX) operates in the Basic Materials sector, specifically the Aluminum industry, with a market capitalization near $6.37B, listed on NASDAQ, employing roughly 2,971 people, carrying a beta of 1.92 to the broader market. Century Aluminum Company, together with its subsidiaries, produces standard-grade and value-added primary aluminum products in the United States and Iceland. Led by Jesse E. Gary, public since 1996-03-29.
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
- 243.8K
- Total Volume
- 686.7K
- Short %
- 35.50%
- 30-Day Avg Short %
- 38.65%
Showing 30 days of FINRA short volume data for Century Aluminum Company.
Learn how short volume is reported and how to read the data →
CENX most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| CALL | $65.00 | Jun 18, 2026 | 101 | 7.1K | 76.6% | $2.45 | $2.80 |
Top 1 contracts from the ORATS-sourced nightly scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked CENX short volume questions
- What is the daily CENX short volume?
- As of May 15, 2026, Century Aluminum Company (CENX) short volume is 243.8K shares against 686.7K total reported volume, or 35.50% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is CENX 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 CENX 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.