SPMB
State Street SPDR Portfolio Mortgage Backed Bond ETF
stockNYSEETF
At CloseOct 2, 2026 3:59:54 PM EDT
21.06USD-0.284%(-0.06)3,503,073
After-hoursOct 2, 2026 4:54:30 PM EDT
21.01USD-0.216%(-0.05)
As of 2026-09-15, there were 416,559 shares short with a short interest of 0.13%.
SPMB Short Interest - Official
Short Interest
SPMB Short Position Change - Official
Short Position Change
SPMB 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 | 0.13 | 416,559 | 1.00 | +176,301 | +73.38 | 325,900,000 | 325,900,000 |
| 2026-08-31 | 0.07 | 240,258 | 1.00 | -143,803 | -37.44 | 324,600,000 | 324,600,000 |
| 2026-08-14 | 0.12 | 384,061 | 1.00 | -511,808 | -57.13 | 320,400,000 | 320,400,000 |
| 2026-07-31 | 0.28 | 895,869 | 1.00 | +647,856 | +261.22 | 316,900,000 | 316,900,000 |
| 2026-07-15 | 0.08 | 248,013 | 1.00 | -251,284 | -50.33 | 316,900,000 | 316,900,000 |
| 2026-06-30 | 0.16 | 499,297 | 1.00 | +279,707 | +127.38 | 317,200,000 | 317,200,000 |
| 2026-06-15 | 0.07 | 219,590 | 1.00 | -394,098 | -64.22 | 315,200,000 | 315,200,000 |
| 2026-05-15 | 0.20 | 613,688 | 1.00 | -230,448 | -27.30 | 307,500,000 | 307,500,000 |
| 2026-04-30 | 0.27 | 844,136 | 1.00 | -299,884 | -26.21 | 309,200,000 | 309,200,000 |
| 2026-04-15 | 0.37 | 1,144,020 | 1.47 | +692,513 | +153.38 | 307,900,000 | 307,900,000 |
| 2026-03-31 | 0.15 | 451,507 | 1.00 | -224,428 | -33.20 | 308,400,000 | 308,400,000 |
| 2026-03-13 | 0.22 | 675,935 | 1.00 | +107,612 | +18.94 | 305,800,000 | 305,800,000 |
| 2026-02-27 | 0.19 | 568,323 | 1.00 | +329,011 | +137.48 | 304,100,000 | 304,100,000 |
| 2026-02-13 | 0.08 | 239,312 | 1.00 | -225,248 | -48.49 | 300,400,000 | 300,400,000 |
| 2026-01-30 | 0.16 | 464,560 | 1.00 | -137,904 | -22.89 | 298,800,000 | 298,800,000 |
| 2026-01-15 | 0.20 | 602,464 | 1.00 | +110,705 | +22.51 | 297,300,000 | 297,300,000 |
| 2025-12-31 | 0.17 | 491,759 | 1.00 | -316,902 | -39.19 | 295,400,000 | 295,400,000 |
| 2025-12-15 | 0.28 | 808,661 | 1.17 | +70,716 | +9.58 | 292,100,000 | 292,100,000 |
| 2025-11-28 | 0.25 | 737,945 | 1.00 | +130,390 | +21.46 | 289,900,000 | 289,900,000 |
| 2025-11-14 | 0.21 | 607,555 | 1.00 | -321,012 | -34.57 | 285,300,000 | 285,300,000 |
| 2025-10-31 | 0.33 | 928,567 | 1.00 | +489,868 | +111.66 | 285,300,000 | 285,300,000 |
| 2025-10-15 | 0.15 | 438,699 | 1.00 | +385,262 | +720.96 | 285,300,000 | 285,300,000 |
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.