MUB Short Volume
iShares National Muni Bond ETF (MUB) operates in the Financial Services sector, specifically the Asset Management - Bonds industry, with a market capitalization near $46.15B, listed on AMEX, carrying a beta of 0.90 to the broader market. This exchange-traded fund is designed to closely replicate the performance of a designated index, which exclusively comprises high-quality municipal bonds issued across the United States. public since 2007-09-10.
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
- 966.2K
- Total Volume
- 2.1M
- Short %
- 46.18%
- 30-Day Avg Short %
- 49.05%
Showing 30 days of FINRA short volume data for iShares National Muni Bond ETF.
Learn how short volume is reported and how to read the data →
MUB most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| PUT | $107.00 | Aug 21, 2026 | 0 | 5.0K | 950.9% | $1.05 | $1.45 |
| PUT | $106.00 | Aug 21, 2026 | 1 | 11.7K | 607.6% | $0.15 | $0.40 |
| CALL | $106.00 | Sep 18, 2026 | 2 | 7.5K | 584.6% | $0.20 | $0.50 |
| PUT | $105.00 | Sep 18, 2026 | 0 | 7.5K | 293.2% | $0.25 | $0.45 |
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 MUB short volume questions
- What is the daily MUB short volume?
- As of Aug 14, 2026, iShares National Muni Bond ETF (MUB) short volume is 966.2K shares against 2.1M total reported volume, or 46.18% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is MUB 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 MUB 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.