State Street Prime Money Market (MMK) — Short Interest History
The most recent FINRA short interest report for MMK (settlement date June 30, 2026) shows 696 shares sold short , a change of -91.22% from the prior report .
Days to cover: 0.52.
Frequently asked questions
What is short interest in MMK?
Short interest is the total number of MMK shares currently sold short but not yet covered or closed out. FINRA publishes this data twice monthly.
How is MMK short interest calculated?
Short interest is aggregated from member firm reports to FINRA. Every U.S. broker-dealer must report aggregate short positions in each security as of the 15th and last trading day of each month.
What does a high short interest mean?
Higher short interest can indicate bearish sentiment, but it also raises the potential for a short squeeze if positive news forces short sellers to cover their positions simultaneously. Compare short interest to float (short percent of float) for context.