KMX Short Volume
CarMax, Inc. (KMX) operates in the Consumer Cyclical sector, specifically the Auto - Dealerships industry, with a market capitalization near $7.82B, listed on NYSE, employing roughly 27,796 people, carrying a beta of 1.17 to the broader market. CarMax, Inc. Led by Keith Barr, public since 1997-02-04.
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
- 1.4M
- Total Volume
- 2.2M
- Short %
- 64.81%
- 30-Day Avg Short %
- 54.00%
Showing 30 days of FINRA short volume data for CarMax, Inc..
Learn how short volume is reported and how to read the data →
KMX most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| PUT | $55.00 | Oct 16, 2026 | 2.1K | 2.5K | 41.2% | $1.40 | $1.50 |
| PUT | $47.50 | Oct 16, 2026 | 1.9K | 2.7K | 43.0% | $0.05 | $0.10 |
| CALL | $62.50 | Oct 16, 2026 | 1.8K | 3.3K | 41.8% | $0.15 | $0.30 |
| PUT | $52.50 | Oct 16, 2026 | 1.3K | 1.6K | 41.3% | $0.45 | $0.70 |
Top 4 contracts from the institutional-grade nightly options scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked KMX short volume questions
- What is the daily KMX short volume?
- As of Sep 30, 2026, CarMax, Inc. (KMX) short volume is 1.4M shares against 2.2M total reported volume, or 64.81% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is KMX 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 KMX 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.