SPYM Short Interest (September 15, 2026 Update)
Short interest for SPYM was 19.6M as of September 15, 2026, -7.8% from the prior report.
This page tracks SPYM short interest over time, including historical values, changes between reports, and days to cover.
State Street SPDR Portfolio S& | SPYM | ARCA | Latest report: September 15, 2026
At the latest settlement date of September 15, 2026, State Street SPDR Portfolio S& (SPYM) showed reported short interest of 19,616,444 shares. That compared with 21,263,507 shares in the prior report, a change of -1.6M shares, or -7.8%. The latest reported days to cover was 1.03, based on average daily volume of 19.1M.
The historical data currently tracked for SPYM includes 33 reported entries from September 13, 2024 to September 15, 2026. Over that span, reported short interest has ranged from 1.6K to 43.1M shares.
Extreme edge-case readings may reflect unusually low reported average volume.
| Settlement Date | Short Interest | Prior Short Interest | Change Shares | Change % | Average Daily Volume | Days to Cover |
|---|---|---|---|---|---|---|
| September 15, 2026 | 19,616,444 | 21,263,507 | -1.6M | -7.8% | 19.1M | 1.03 |
| August 31, 2026 | 21,263,507 | 21,213,442 | 50.1K | +0.2% | 7.9M | 2.68 |
| August 14, 2026 | 21,213,442 | 20,239,028 | 974.4K | +4.8% | 9.5M | 2.24 |
| July 31, 2026 | 20,239,028 | 20,007,921 | 231.1K | +1.2% | 9.6M | 2.11 |
| July 15, 2026 | 20,007,921 | 18,380,394 | 1.6M | +8.8% | 13.1M | 1.53 |
| June 30, 2026 | 18,380,394 | 13,089,295 | 5.3M | +40.4% | 13.6M | 1.35 |
| June 15, 2026 | 13,089,295 | 11,105,301 | 2.0M | +17.9% | 20.5M | 1 |
| May 29, 2026 | 11,105,301 | 7,663,119 | 3.4M | +44.9% | 10.7M | 1.04 |
| May 15, 2026 | 7,663,119 | 8,133,973 | -470.9K | -5.8% | 7.2M | 1.06 |
| April 30, 2026 | 8,133,973 | 6,713,539 | 1.4M | +21.2% | 8.8M | 1 |
| April 15, 2026 | 6,713,539 | 8,325,187 | -1.6M | -19.4% | 14.8M | 1 |
| March 31, 2026 | 8,325,187 | 8,367,645 | -42.5K | -0.5% | 24.7M | 1 |
| March 13, 2026 | 8,367,645 | 6,697,053 | 1.7M | +24.9% | 25.0M | 1 |
| February 27, 2026 | 6,697,053 | 7,230,413 | -533.4K | -7.4% | 12.6M | 1 |
| February 13, 2026 | 7,230,413 | 6,823,889 | 406.5K | +6.0% | 12.2M | 1 |
| January 30, 2026 | 6,823,889 | 11,502,759 | -4.7M | -40.7% | 9.5M | 1 |
| January 15, 2026 | 11,502,759 | 37,359,911 | -25.9M | -69.2% | 11.7M | 1 |
| December 31, 2025 | 37,359,911 | 36,684,512 | 675.4K | +1.8% | 11.6M | 3.21 |
| December 15, 2025 | 36,684,512 | 43,057,290 | -6.4M | -14.8% | 11.8M | 3.1 |
| November 28, 2025 | 43,057,290 | 29,391,887 | 13.7M | +46.5% | 11.8M | 3.66 |
| November 14, 2025 | 29,391,887 | 29,225,333 | 166.6K | +0.6% | 7.1M | 4.16 |
| October 31, 2025 | 29,225,333 | 29,578,155 | -352.8K | -1.2% | 10.0M | 2.93 |
| February 14, 2025 | 2,193 | 1,976 | 217 | +11.0% | 2.8K | 1 |
| January 31, 2025 | 1,976 | 5,388 | -3.4K | -63.3% | 3.5K | 1 |
| January 15, 2025 | 5,388 | 1,620 | 3.8K | +232.6% | 2.4K | 2.22 |
| December 31, 2024 | 1,620 | 1,914 | -294 | -15.4% | 5.0K | 1 |
| December 13, 2024 | 1,914 | 2,874 | -960 | -33.4% | 2.1K | 1 |
| November 29, 2024 | 2,874 | 1,640 | 1.2K | +75.2% | 2.4K | 1.19 |
| November 15, 2024 | 1,640 | 1,604 | 36 | +2.2% | 1.7K | 1 |
| October 31, 2024 | 1,604 | 25,078 | -23.5K | -93.6% | 1.3K | 1.26 |
| October 15, 2024 | 25,078 | 10,654 | 14.4K | +135.4% | 4.0K | 6.34 |
| September 30, 2024 | 10,654 | 6,616 | 4.0K | +61.0% | 2.4K | 4.5 |
| September 13, 2024 | 6,616 | 0 | 6.6K | +100.0% | 1.6K | 4.04 |