CMCSA Short Volume
Comcast Corporation (CMCSA) operates in the Communication Services sector, specifically the Telecommunications Services industry, with a market capitalization near $92.90B, listed on NASDAQ, employing roughly 179,000 people, carrying a beta of 0.65 to the broader market. Comcast Corporation functions as a global media and technology conglomerate. Led by Brian L. Roberts, public since 1980-03-17.
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
- 2026-08-14
- Short Volume
- 5.2M
- Total Volume
- 8.4M
- Short %
- 61.42%
- 30-Day Avg Short %
- 47.46%
Showing 30 days of FINRA short volume data for Comcast Corporation.
Learn how short volume is reported and how to read the data →
CMCSA most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| CALL | $30.00 | Jan 15, 2027 | 143 | 103.2K | 32.9% | $0.88 | $1.01 |
Top 1 contracts from the institutional-grade nightly options scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked CMCSA short volume questions
- What is the daily CMCSA short volume?
- As of Aug 14, 2026, Comcast Corporation (CMCSA) short volume is 5.2M shares against 8.4M total reported volume, or 61.42% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is CMCSA 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 CMCSA 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.