SEM Short Volume
Select Medical Holdings Corporation (SEM) operates in the Healthcare sector, specifically the Medical - Care Facilities industry, with a market capitalization near $2.05B, listed on NYSE, employing roughly 30,000 people, carrying a beta of 0.79 to the broader market. Select Medical Holdings Corporation (SEM) is a U. Led by Thomas Mullin, public since 2009-09-25.
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
- 2026-06-30
- Short Volume
- 1.3M
- Total Volume
- 9.4M
- Short %
- 13.30%
- 30-Day Avg Short %
- 42.48%
Showing 30 days of FINRA short volume data for Select Medical Holdings Corporation.
Learn how short volume is reported and how to read the data →
Frequently asked SEM short volume questions
- What is the daily SEM short volume?
- As of Jun 30, 2026, Select Medical Holdings Corporation (SEM) short volume is 1.3M shares against 9.4M total reported volume, or 13.30% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is SEM 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 SEM 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.