State Street Prime Money Market ETF

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Robinhood gives you the tools you need to put your money in motion. You can buy or sell MMK and other ETFs, options, and stocks.

About MMK

MMK is an actively managed ETF that broadly invests in ultra-short term money market instruments issued from around the world. The fund assesses instruments based on relative attractiveness using its own credit research team. 

Category
Prime Money Market
CategoryPrime Money Market
Number of holdings
56
Number of holdings56
Inception Date
Feb 11, 2026
Inception DateFeb 11, 2026

MMK Key Statistics

AUM
25.02M
AUM25.02M
Price-Earnings ratio
Price-Earnings ratio
30-Day yield
30-Day yield
Average volume
369.40
Average volume369.40
High today
High today
Low today
Low today
Open price
$100.07
Open price$100.07
Volume
0.00
Volume0.00
52 Week high
$100.19
52 Week high$100.19
52 Week low
$100.01
52 Week low$100.01
Expense ratio
0.18
Expense ratio0.18

Stock Snapshot

The current State Street Prime Money Market ETF(MMK) stock price is $100.07, with a market capitalization of 25.02M.

On 2026-03-10, State Street Prime Money Market ETF(MMK) stock opened at $100.07, reached a high of —, and a low of —.

The State Street Prime Money Market ETF(MMK)'s current trading volume is 0, compared to an average daily volume of 369.4.

In the last year, State Street Prime Money Market ETF(MMK) shares hit a 52-week high of $100.19 and a 52-week low of $100.01.

In the last year, State Street Prime Money Market ETF(MMK) shares hit a 52-week high of $100.19 and a 52-week low of $100.01.

Average Annual Return

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All investments involve risks, including the loss of principal. Performance data represents past performance and is no guarantee of future results. Investment returns and principal value will fluctuate and are subject to market volatility. An investment, when redeemed, may be worth more or less than the original cost. Current performance may be lower or higher than the performance data quoted. Options are risky and aren’t suitable for all investors. To learn more about risks, read the Options Disclosure Document.