State Street Prime Money Market ETF (MMK)

NYSE: MMKState Street Investment ManagementPrime Money MarketETFUSD

100.12+0.035 (+0.03%)

At close: Oct 9, 3:37 PM ET · Delayed 15 min

MMK chart

Key facts

Expense ratio: 0.18%
Assets (AUM): $29.09M
Dividend yield: —
Holdings: —
Inception: Feb 11, 2026
Issuer: State Street Investment Management
Index tracked: —
Category: Prime Money Market
52-week range: 99.99 – 100.34
Volume / Avg: 1.25K / 1.61K
Beta: —
Previous close: 100.09

MMK ETF today

The State Street Prime Money Market ETF (MMK) is an exchange-traded fund from State Street Investment Management in the Prime Money Market category. It charges an expense ratio of 0.18%, or $18.00 per year on a $10,000 investment, and manages $29.1 million in assets. MMK launched on Feb 11, 2026.

Summary generated from market data by MetaCap's automated system. Methodology

MMK performance

1 week

+0.04%

MMK price return, excluding dividends.

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MMK ETF FAQ

What is the MMK price today?

MMK last traded at $100.12 as of Oct 9, 3:37 PM EDT, up 0.03% on the day.

What is MMK's expense ratio?

MMK has an expense ratio of 0.18%, which works out to about $18.00 per year for every $10,000 invested.

How big is MMK?

MMK has about $29.1 million in assets under management.