UMC Short Volume
United Microelectronics Corporation (UMC) operates in the Technology sector, specifically the Semiconductors industry, with a market capitalization near $55.85B, listed on NYSE, employing roughly 20,000 people, carrying a beta of 1.56 to the broader market. United Microelectronics Corporation (UMC) operates as a specialized semiconductor wafer foundry, extending its services globally with operations across Taiwan, Singapore, China, Hong Kong, Japan, the United States, and Europe. Led by Jason S. Wang, public since 2000-09-19.
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
- 2026-10-14
- Short Volume
- 1.1M
- Total Volume
- 2.5M
- Short %
- 43.02%
- 30-Day Avg Short %
- 60.60%
Showing 30 days of FINRA short volume data for United Microelectronics Corporation.
Learn how short volume is reported and how to read the data →
Frequently asked UMC short volume questions
- What is the daily UMC short volume?
- As of Oct 14, 2026, United Microelectronics Corporation (UMC) short volume is 1.1M shares against 2.5M total reported volume, or 43.02% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is UMC 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 UMC 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.