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
77
Number of holdings77
Inception Date
Feb 11, 2026
Inception DateFeb 11, 2026

MMK Key Statistics

AUM
29.02M
AUM29.02M
Price-Earnings ratio
Price-Earnings ratio
30-Day yield
3.62
30-Day yield3.62
Average volume
1.25K
Average volume1.25K
High today
High today
Low today
Low today
Open price
$100.07
Open price$100.07
Volume
0.00
Volume0.00
52 Week high
$100.34
52 Week high$100.34
52 Week low
$99.99
52 Week low$99.99
Expense ratio
0.18
Expense ratio0.18

Stock Snapshot

State Street Prime Money Market ETF(MMK) stock is priced at $100.07, giving the company a market capitalization of 29.02M.

State Street Prime Money Market ETF(MMK) stock opened on 2026-09-08 at $100.07. The price climbed to — and dipped to —.

State Street Prime Money Market ETF(MMK) shares are trading with a volume of 0, against a daily average of 1.25K.

In the last year, State Street Prime Money Market ETF(MMK) shares hit a 52-week high of $100.34 and a 52-week low of $99.99.

In the last year, State Street Prime Money Market ETF(MMK) shares hit a 52-week high of $100.34 and a 52-week low of $99.99.

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.