TNDM Short Volume
Tandem Diabetes Care, Inc. (TNDM) operates in the Healthcare sector, specifically the Medical - Devices industry, with a market capitalization near $966.9M, listed on NASDAQ, employing roughly 2,650 people, carrying a beta of 1.64 to the broader market. Tandem Diabetes Care, Inc. Led by John F. Sheridan, public since 2013-11-14.
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
- 1.9M
- Total Volume
- 2.9M
- Short %
- 64.20%
- 30-Day Avg Short %
- 58.47%
Showing 30 days of FINRA short volume data for Tandem Diabetes Care, Inc..
Learn how short volume is reported and how to read the data →
TNDM most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| CALL | $15.00 | Jan 15, 2027 | 1.1K | 138 | 79.5% | $2.20 | $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 TNDM short volume questions
- What is the daily TNDM short volume?
- As of May 15, 2026, Tandem Diabetes Care, Inc. (TNDM) short volume is 1.9M shares against 2.9M total reported volume, or 64.20% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is TNDM 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 TNDM 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.