MMK State Street Prime Money Market ETF

ETF

ETF quote, holdings, sector allocation, technicals, and options analytics. Fibonacci levels

Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.

MMK — —
Key stats
About

State Street Prime Money Market ETF (MMK) ETF

No description available.

Exchange
XNYS
Inception
2026-02-11
Has Options
No
Homepage
https://www.ssga.com/us/en/individual/etfs
Fund profile
holdings as of Oct 20, 2026issuer data
Taxable Bond Ultra-Short Bond#38 of 50 by assets State Street SPDR
Expense ratio
0.18%
issuer, Oct 22, 2026
Assets
$32M
issuer-reported, Oct 20, 2026
Trailing yield
2.30%
paid monthly
Average daily volume
$203K
30 sessions
Holdings
72
top 10 are 13.1%
Listed
Feb 10, 2026
NYSE
Net asset value
$100.21
issuer, Oct 20, 2026 · closed +0.00% to NAV
Median bid/ask spread
0.01%
30 days, issuer-reported
Closure risk, 12 months
4.5%
low: trading volume, age · model
FrenzyCap ETF score
43
how it is built
Cost65
Liquidity10
Scale3
Diversification86

Moves with. Long Treasuries (5% of its variance, beta 0.04). These factors explain 11% of its daily moves over the last year, so most of what drives this fund is something else.

Stated objective. The investment objective of the State Street Prime Money Market ETF (the Fund) is to seek to maximize current income, to the extent consistent with the preservation of capital and liquidity. (from the fund's prospectus)

All 72 holdingsOverlap toolAll Ultra-Short Bond ETFs

Fund flows
daily as of Oct 19, 2026issuer data
Oct 19, 2026
$0
latest day
Latest 5 trading days
+$3.0M
Latest 21 trading days
+$3.0M
+9.4% of assets
Year to date
+$7.0M
Each day
Net creations of MMK by day, Sep 21, 2026 to Oct 19, 2026
DayNet flow
Oct 19, 2026$0
Oct 16, 2026$0
Oct 15, 2026$0
Oct 14, 2026+$3.0M
Oct 13, 2026$0
Oct 12, 2026$0
Oct 9, 2026$0
Oct 8, 2026$0
Oct 7, 2026$0
Oct 6, 2026$0
Oct 5, 2026$0
Oct 2, 2026$0
Oct 1, 2026$0
Sep 30, 2026$0
Sep 29, 2026$0
Sep 28, 2026$0
Sep 25, 2026$0
Sep 24, 2026$0
Sep 23, 2026$0
Sep 22, 2026$0
Sep 21, 2026$0

Daily figures are the change in shares outstanding times net asset value, both as the issuer publishes them each day.

Similar funds
FundOverlapFeeAssets1Y
JPSTJPMorgan Ultra-Short Income ETF—0.18%$42.8B−0.8%compare
PULSPGIM Ultra Short Bond ETF—0.15%$19.7B−0.4%compare
MINTPIMCO Enhanced Short Maturity Active Exchange-Traded Fund—0.36%$18.9B+0.1%compare
BOXXAlpha Architect 1-3 Month Box ETF—0.19%$12.7B+4.0%compare
ICSHiShares Ultra Short Duration Bond Active ETF—0.08%$9.0B−0.6%compare

The largest other funds in the Ultra-Short Bond category.

ETF Profile
holdings as of 2026-10-20
Holdings
72
AUM
$32.1M
Provider
SPDR (State Street)
Inception
2026-02-10
Exchange
XNYS
Data As Of
2026-10-20
Expense Ratio
0.18%
Dividend Yield
2.30%
Distribution
Monthly
Recent distributions
Ex-Date Pay Date Amount Type
2026-10-01 2026-10-06 $0.3111 CD
2026-09-01 2026-09-04 $0.3096 CD
2026-08-03 2026-08-06 $0.3075 CD
2026-07-01 2026-07-07 $0.2881 CD
2026-06-01 2026-06-04 $0.3063 CD
2026-05-01 2026-05-06 $0.2979 CD
Asset Allocation
Top Holdings
top 50 of 72 holdings
Symbol Name Weight % Asset Class Country
— US DOLLAR 35.18% Cash/Money Market —
— VERTO CAP I COMPARTMENT 10/26 ZCP 1.87% Corporate Bond —
— BARCLAYS BANK UK 1.56% Corporate Bond —
— ANGLESEA FDG PLC + ANG 1.56% Corporate Bond —
— MACKINAC FUNDING 1.38% Corporate Bond —
— VERTO CAP I 144A DISC COML PAP 11/26 ZCP 1.24% Corporate Bond —
— BPCE 1.16% Corporate Bond FR
— BANK MONTREAL CHICAGO BRH 1.09% Corporate Bond CA
— NORDEA BANK ABP 1.09% Corporate Bond FI
— HSBC BANK PLC 1.09% Corporate Bond —
— SWEDBANK AB PUBL IAM COML PAPE 02/27 VAR 1.09% Corporate Bond —
— ROYAL BANK OF CANADA 1.09% Corporate Bond —
— KBC BK NV INSTL CTF DEP PROGRA 1.09% Corporate Bond —
— CREDIT AGRICOLE CIB TD - 23Oct26 1.09% Corporate Bond —
— MERRILL LYNCH TRI PARTY E REPO 1.09% Corporate Bond —
— NORINCHUKIN BK NEW YORK BRH IN 1.09% Corporate Bond —
— PARK AVE COLL NOTES 1.09% Corporate Bond —
— MUFG BK LTD 1.09% Corporate Bond —
— BANK NOVA SCOTIA HOUSTON TEX 1.09% Corporate Bond CA
— CHESHAM FNC/ CHESH LLC 1.09% Corporate Bond —
— UNITED OVERSEAS BK LTD 1.09% Corporate Bond —
— CREDIT INDL ET COML INSTL CTF 1.09% Corporate Bond —
— WELLS FARGO BANK NA 1.09% Corporate Bond US
— HQLA FDG LLC SER CHAMPLAIN SER 10/26 ZCP 1.09% Corporate Bond —
— ANGLESEA FDG PLC + ANG 1.09% Corporate Bond —
— AQUITAINE FDG CO LLC 1.09% Corporate Bond —
— PARK AVE COLL NOTES 1.09% Corporate Bond —
— TREASURY BILL 1.09% Treasury US
— HELVETICA FDG CO LLC DISC COML 12/26 ZCP 1.09% Corporate Bond —
— BRIGANTINE FDG CO LLC DISC COM 12/26 ZCP 1.09% Corporate Bond —
— ING BK NV DISC COML PAPER 1.08% Corporate Bond —
— SVENSKA HANDLSBNKN A 1.08% Corporate Bond —
— DNB NOR BANK ASA 1.08% Corporate Bond —
— TREASURY BILL 1.07% Treasury US
— TOKENEKE FDG CO LLC DISC COML 03/27 ZCP 1.07% Corporate Bond —
— AUST + NEW ZEA 1.07% Corporate Bond —
— WESTPAC BANKING CORP. 1.07% Corporate Bond AU
— CITIBANK NA N Y BRH INSTL 0.94% Corporate Bond —
— BNP PARIBAS NY BRANCH 12/26 FIXED 4.0 0.94% Corporate Bond —
— CREDIT INDL ET COML INSTL CTF 0.93% Corporate Bond —
— SKANDIN ENS BANKEN AG 0.89% Corporate Bond —
— AUST + NEW ZEA 0.89% Corporate Bond —
— WELLS FARGO BANK NA 0.78% Corporate Bond US
— NATL AUSTRALIA BK LT 0.78% Corporate Bond —
— NATL AUSTRALIA BK LT 0.78% Corporate Bond —
— AQUITAINE FDG 12/26 VAR 0.78% Corporate Bond —
— SVENSKA HANDELSBANKEN AB 05/27 VAR 0.78% Corporate Bond —
— WELLS FARGO BANK NA 0.78% Corporate Bond US
— BANQUE NATIONALE DU CANADA TD - 22Oct26 0.78% Corporate Bond —
— BANQUE NATIONALE DU CANADA TD - 23Oct26 0.78% Corporate Bond —
Chart
Seasonality
'26Avg
Jan----
Feb0.17%0.17%
Mar0.27%0.27%
Apr0.30%0.30%
May0.29%0.29%
Jun0.29%0.29%
Jul0.29%0.29%
Aug0.28%0.28%
Sep0.27%0.27%
Oct0.22%*0.22%
Nov----
Dec----
Total2.41%2.41%
* Only 1 year(s) of data available.
Technical Indicators

Quick-reference for reading the values below. Indicators combine to confirm a view — no single one is a trade signal on its own.

Trend Indicators
  • SMA 20 / 50 / 200 — price above = uptrend, below = downtrend. SMA 50 crossing SMA 200 is the golden/death cross.
  • EMA 12 / 26 — faster-reacting averages; 12 above 26 is short-term bullish.
  • MACD — bullish when MACD > signal (green badge), bearish when below. Divergence from price often precedes reversals.
  • ADX (14) — trend strength regardless of direction. <20 range, 20–25 weak trend, 25–50 trend, >50 strong trend.
  • +DI / −DI — +DI > −DI favors bulls; the reverse favors bears. Read alongside ADX.
Momentum Oscillators
  • RSI (14) — <30 oversold, >70 overbought. 40–60 is neutral; trending names can stay extreme.
  • Stochastic %K / %D — <20 oversold, >80 overbought. %K crossing %D is an early momentum signal.
  • Williams %R — inverted scale: <−80 oversold, >−20 overbought.

Oscillators work best in range-bound markets; in strong trends they give premature reversal signals.

Volume & Volatility
  • Bollinger Bands — price at upper band = overbought, lower = oversold. Narrow bands (squeeze) often precede expansion.
  • OBV — cumulative volume; rising OBV confirms uptrend, falling OBV confirms downtrend. Divergence from price is a warning.
  • Vol SMA 20 / Vol ROC — today's volume vs. 20-day average. Positive ROC with price move = conviction.
  • ATR / True Range — average daily $ move; sizing and stop-loss reference.
  • HV 20 / 30 / 60 — realized (historical) volatility. Compare to IV on the options cards: IV > HV = rich premium.

Confluence matters: trend + momentum + volume agreeing carries far more weight than any single indicator. For how these feed the spread scanner score, see the algorithm docs →

Trend Indicators

SMA 20: $100.16
SMA 50: $100.17
SMA 200: —
Current: $100.22
EMA 12: $100.17
EMA 26: $100.16
MACD: 0.0092 | Signal: 0.0129
BEARISH
ADX (14): 16.82
RANGE
+DI: 52.82
−DI: 31.58

Momentum Oscillators

RSI (14): 60.40
NEUTRAL
Stoch %K: 87.54
Stoch %D: 74.88
Williams %R: -2.38

Volume & Volatility

BB Upper: $100.33
BB Lower: $99.98
NEUTRAL
OBV: 205,607
Vol SMA 20: 2,019
Vol ROC: -48.65%
ATR: $0.03
True Range: $0.02
HV 20: 1.1%
HV 30: 0.9%
HV 60: 1.1%

Data Summary

Data Points: 173
Last Updated:
Date Range: 2026-02-12T00:00:00 – 2026-10-21T00:00:00
AI Analysis

LLM Stock Analysis Report: MMK

Executive Summary

Overall Assessment: NEUTRAL (6/10)

Key Drivers:

  • Trend direction: Weak uptrend (ADX 22.14)
  • Support/resistance levels: $100.01 (lower Bollinger band) and $100.33 (upper Bollinger band)
  • Momentum signals: Bullish MACD and Stochastic indicators
  • Volume analysis: Weak volume trends

Primary Risks:

  • Beta -0.00 indicates inverse correlation with the market, increasing volatility risk
  • Lack of recent news headlines may lead to unpredictable price movements

Investment Thesis: MMK's neutral trend and mixed momentum signals indicate a high degree of uncertainty. The stock's inverse correlation with the market increases its volatility risk, making it challenging to predict its near-term performance.

Recent News Sentiment Impact: N/A (no recent news headlines available)

Technical Analysis

Trend Direction: Weak uptrend (ADX 22.14)

Support/Resistance Levels:

  • Lower Bollinger band: $100.01
  • Upper Bollinger band: $100.33

Momentum Signals: RSI interpretation: Neutral (69.78) MACD signal: Bullish (0.03 / Signal: 0.01 / Histogram: 0.02) Stochastic %K/D: Bullish (97.39 and 97.69) Williams %R: Neutral (0.00)

Volume Analysis: Volume SMA 20: 2225.70 On-Balance Volume (OBV): 121003.81 Volume Rate of Change: -28.20% (weak volume trends)

News & Sentiment Analysis

Recent Headlines Summary: N/A (no recent news headlines available) Sentiment Assessment: Neutral Catalyst Identification: None Market Narrative: N/A

Risk & Volatility Assessment

Beta Interpretation: Inverse correlation with the market (beta -0.00)

Volatility Regime: High volatility risk due to inverse correlation with the market

Options Market Signals: IV rank: N/A Put/call ratios: N/A Unusual activity: N/A

Downside Protection: Support levels: $100.01 and $100.17 (SMA 20) Risk management considerations: None

Market Context & Positioning

Sector Performance: N/A (no sector data available)

Institutional Activity: N/A (no institutional activity data available)

Correlation Analysis: Inverse correlation with the market (beta -0.00)

Relative Valuation: Neutral

Key Levels & Action Items

Critical Price Levels:

  • Support/resistance levels: $100.01 and $100.33 (Bollinger bands)
  • Breakout/breakdown levels: N/A

Time-Sensitive Catalysts: None

Risk Management: None

Generated
News
All MMK news →

MMK Options Activity & IV Rank

Loading options activity...
Spread Scanner GPU
Full Algorithm Docs ↗

Each spread is ranked by a composite score built in three stages. Full documentation →

Stage 1 — Base Score (GPU scanner)

score = P(profit) × (credit / spread_width)
P(profit) from short leg delta (1 − |delta|), penalised above 85%. Credit uses mid-price to handle illiquid chains fairly.

Stage 2 — Skew Adjustment (±25% cap)

RR and BF (30-delta) from the persisted per-symbol skew snapshot — wing strikes picked by real greeks.delta, not a moneyness proxy. Put skew boosts bull puts, penalises bear calls. High butterfly boosts iron condors. Calendars are skew-neutral.

Stage 3 — Technical Overlay (±50% cap, 5 groups)
Group 1 · Directional Bias (±0.25)
  • RSI <40 bullish / >60 bearish
  • MACD crossover + histogram trend
  • Price vs SMA 50 & SMA 200
Group 2 · Momentum (±0.10)
  • Stochastic %K <20 / >80
  • Williams %R <−80 / >−20
Group 3 · Volatility (up to −0.25 / +0.15)
  • Blended ATR + straddle expected-move penalty
  • Bollinger Band signal (+ counter-trend penalty)
  • BB width — vol contraction boost for ICs
Group 4 · IV Regime (±0.15)
  • IV rank ≥ 75 → strong boost for credit spreads
  • IV rank < 25 → penalty (selling cheap vol)
Group 5 · Liquidity (penalty up to −0.10)
  • Min open interest across all legs
  • OI < 100 → −0.10 · OI < 500 → −0.05

score = base_score × skew_multiplier × tech_multiplier
Both multipliers are shown per spread. Beta is informational only — ATR already captures realized vol. Full algorithm documentation →

Enter a ticker to scan for optimal spread opportunities.

Evaluates all bull put, bear call, iron condor, and calendar spread combinations using GPU-accelerated analysis.

Skew (Wing IV − ATM IV)
DTE:
Wing Δ:
Metric:
Wing vs ATM
IV(put wing) − IV(ATM), in vol points

How much the OTM put trades above (or below) the at-the-money strike. Measures the height of the put-side tail relative to ATM — i.e. how expensive crash insurance is on this name.

  • Positive (typical) — wing IV > ATM IV. Standard equity put skew: portfolios bid up crash protection, so OTM puts trade richer than ATM.
  • Near zero or negative (unusual) — wing IV ≤ ATM IV. Flat or inverted put side. Common when there's no fear demand, in tightly mean-reverting names, or right after an earnings catalyst clears.
  • Percentile vs own 3-yr history: high = wings rich (good time to sell wing premium); low = wings cheap (good time to buy protection).
  • Not directional — high or low wings don't predict up or down moves. It's a price tag on tail insurance, not a forecast.
Risk Reversal
IV(call wing) − IV(put wing), equal delta on each side

Which side of the smile is the market paying up for? Measures the tilt of the surface — call skew vs put skew at matched deltas.

  • Negative (typical) — puts richer than calls. Standard equity behavior: hedging demand makes puts carry a premium. Most large-caps sit in the −1 to −5 vol-point range.
  • Strongly negative (< −5 pts) — heavy downside hedging, elevated fear, or an upcoming catalyst (earnings, FDA, macro event). Worth flagging.
  • Positive — calls richer than puts. Unusual for equities; signals bullish momentum, short-squeeze positioning, or takeover/M&A speculation.
  • Near zero — symmetric surface. Market sees roughly equal up/down risk. Rare for large-caps; more common in commodities and FX.
Reading them together

Wing-vs-ATM tells you how expensive the tails are. Risk Reversal tells you which side is favored. Combined:

  • High wing percentile + deeply negative RR → strong put bid; stress or major event priced in. Owning protection costs a premium; selling put premium is dangerous.
  • Low wing percentile + near-zero RR → complacency; insurance cheap and balanced. Good environment to add cheap downside hedges.
  • Positive RR + elevated wings → call-side fear-of-missing-out; common in squeeze setups. Upside calls expensive, downside puts not bid.
14 DTE / 10d —
— pts EXTREME
ATM — / Wing —
30 DTE / 10d —
— pts EXTREME
ATM — / Wing —

Percentile is the rank of today's reading within ~3 years of this symbol's own history. High percentile = wings are rich relative to history; not a directional signal. Skew is read off the chain in real time, not from CBOE SKEW.

Volatility Surface

Enter a ticker to render the implied volatility surface.

Volatility Smile

Enter a ticker to render the implied volatility smile.

IV Rank (7 DTE)
IV Rank (30 DTE)
Straddle Price (30 DTE)
Beta Analysis

Risk Metrics

Beta: -0.0050
Alpha: 0.40%
Correlation: -0.0659
R-Squared: 0.4%
Stock Volatility: 1.0%
Market Volatility: 13.1%

Analysis Details

Benchmark: SPY
Data Points: 172
Period: 252 trading days
Interpretation:
Negative beta - stock moves opposite to market
Beta & Alpha Over Time

MMK Institutional Ownership (13F)

Latest filings — 2026-06-30

Institutional managers with $100M+ AUM file Form 13F-HR quarterly, due 45 days after quarter end. Holdings are reported gross at quarter-end market value — they are a snapshot, not a real-time position.

  • Shares — long equity positions in this name, aggregated across share classes.
  • Calls / Puts — notional value of long call / put exposure where this ticker is the underlying.
  • % of Float — holder's reported shares divided by the latest diluted shares outstanding. Sums above 100% indicate large custodian / prime broker positions where the same shares are reported by multiple filers.
  • Custodian badge — filers with more than 5,000 holdings are typically broker-dealers / custodians reporting customer-held shares, not active managers.

Each filer is counted once at its latest 13F-HR filing. New filings are ingested on a weekly cadence.

1 filers3,180 shares$318.89K value
# Filer Shares Value % of Total % of Float Period
1 Citadel Advisors LLC Custodian 3,180 $318.89K 100.00% — 2026-06-30
# Filer Notional Value % of Total Period
# Filer Notional Value % of Total Period
Constituent Performance

Click any bar to view the full quote for that stock.

Constituents
Symbol Name Weight % Price 1 Day 1 Week 1 Month