MUB
iShares National Muni Bond ETF
stockNYSEETF
Market OpenOct 5, 2026 1:27:52 PM EDT
100.86USD-0.104%(-0.10)11,811,259
100.85Bid100.86Ask0.01SpreadPre-marketOct 5, 2026 9:29:30 AM EDT
101.08USD+0.119%(+0.12)
As of 2026-09-15, there were 11,953,104 shares short with a short interest of 2.77%.
MUB Short Interest - Official
Short Interest
MUB Short Position Change - Official
Short Position Change
MUB Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | 2.77 | 11,953,104 | 1.04 | +3,879,819 | +48.06 | 432,300,000 | 432,300,000 |
| 2026-08-31 | 1.87 | 8,073,285 | 1.89 | +2,442,050 | +43.37 | 432,200,000 | 432,200,000 |
| 2026-08-14 | 1.30 | 5,631,235 | 1.39 | -441,822 | -7.28 | 432,800,000 | 432,800,000 |
| 2026-07-31 | 1.42 | 6,073,057 | 1.29 | +520,924 | +9.38 | 427,200,000 | 427,200,000 |
| 2026-07-15 | 1.30 | 5,552,133 | 1.67 | +1,215,781 | +28.04 | 427,200,000 | 427,200,000 |
| 2026-06-30 | 1.02 | 4,336,352 | 1.42 | -1,064,076 | -19.70 | 424,800,000 | 424,800,000 |
| 2026-06-15 | 1.28 | 5,400,428 | 1.52 | +349,329 | +6.92 | 422,100,000 | 422,100,000 |
| 2026-05-15 | 1.23 | 5,051,099 | 1.65 | -1,339,714 | -20.96 | 411,200,000 | 411,200,000 |
| 2026-04-30 | 1.56 | 6,390,813 | 2.24 | +359,398 | +5.96 | 408,800,000 | 408,800,000 |
| 2026-04-15 | 1.48 | 6,031,415 | 1.50 | -339,798 | -5.33 | 406,800,000 | 406,800,000 |
| 2026-03-31 | 1.59 | 6,371,213 | 1.25 | -1,527,410 | -19.34 | 401,200,000 | 401,200,000 |
| 2026-03-13 | 1.98 | 7,898,623 | 2.08 | +135,908 | +1.75 | 398,000,000 | 398,000,000 |
| 2026-02-27 | 1.96 | 7,762,715 | 2.92 | -634,341 | -7.55 | 395,400,000 | 395,400,000 |
| 2026-02-13 | 2.12 | 8,397,056 | 2.48 | +1,158,055 | +16.00 | 395,400,000 | 395,400,000 |
| 2026-01-30 | 1.86 | 7,239,001 | 1.78 | -514,658 | -6.64 | 390,000,000 | 390,000,000 |
| 2026-01-15 | 1.98 | 7,753,659 | 1.71 | +922,924 | +13.51 | 391,200,000 | 391,200,000 |
| 2025-12-31 | 1.76 | 6,830,735 | 2.10 | -71,291 | -1.03 | 387,900,000 | 387,900,000 |
| 2025-12-15 | 1.78 | 6,902,026 | 2.06 | +81,268 | +1.19 | 387,900,000 | 387,900,000 |
| 2025-11-28 | 1.76 | 6,820,758 | 1.57 | -687,407 | -9.16 | 387,800,000 | 387,800,000 |
| 2025-11-14 | 2.00 | 7,508,165 | 1.73 | +209,813 | +2.87 | 375,100,000 | 375,100,000 |
| 2025-10-31 | 1.95 | 7,298,352 | 1.95 | -191,667 | -2.56 | 375,100,000 | 375,100,000 |
| 2025-10-15 | 2.00 | 7,490,019 | 2.47 | +563,737 | +8.14 | 375,100,000 | 375,100,000 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.