CORB AB Core Bond 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.

CORB — —
Key stats
About

AB Core Bond ETF (CORB) ETF

No description available.

Exchange
ARCX
Inception
2002-05-17
Has Options
No
Fund profile
holdings as of May 31, 2026SEC filingthrough May 2026flows, SEC filings
Expense ratio
0.28%
prospectus, filed Mar 27, 2026
Assets
$1.1B
SEC filing, May 31, 2026
Trailing yield
3.87%
paid monthly
Average daily volume
$3.1M
30 sessions
Holdings
711
top 10 are 20.8%
Listed
May 17, 2002
NYSE Arca
Closure risk, 12 months
0.6%
low · model
FrenzyCap ETF score
66
how it is built
Cost52
Liquidity50
Scale75
Diversification100

Moves with. Long Treasuries (58% of its variance, beta 0.31); High yield over Treasuries (10% of its variance, beta -0.25); US large-cap stocks (9% of its variance, beta 0.07). These factors explain 84% of its daily moves over the last year.

Stated objective. The Funds investment objective is to provide safety of principal and a moderate to high rate of current income. (from the fund's prospectus)

All 711 holdingsFlow historyOverlap toolAll Core Bond ETFs

Fund flows
through May 2026SEC filings
May 2026
+$57M
latest reported month
Latest 3 months
+$128M
+12.2% of assets
Latest 12 months
—
Nov 2025: +$18MNovDec 2025: +$9.0MDecJan 2026: +$4.5M+$4.5MJanFeb 2026: +$57MFebMar 2026: +$27MMarApr 2026: +$44MAprMay 2026: +$57M+$57MMay
View as a table
Net flows of CORB by month, Nov 2025 to May 2026
MonthNet flow
May 2026+$57M
Apr 2026+$44M
Mar 2026+$27M
Feb 2026+$57M
Jan 2026+$4.5M
Dec 2025+$9.0M
Nov 2025+$18M

Net creations and redemptions from the fund's SEC filings, which become public about 60 days after each quarter. Every month since 7 months ago

Similar funds
FundOverlapFeeAssets1Y
BNDVanguard Total Bond Market—0.03%$158.8B−5.5%compare
AGGiShares Core U.S. Aggregate Bond ETF—0.03%$137.1B−5.5%compare
IUSBiShares Trust iShares Core Universal USD Bond ETF—0.06%$48.6B−5.4%compare
BIVVanguard Intermediate-Term Bond ETF—0.03%$28.1B−6.5%compare
FBNDFidelity Total Bond ETF—0.36%$28.0B−6.2%compare

The largest other funds in the Core Bond category.

Under the hood
fiscal year to Nov 30, 2025SEC census
Authorized participants
3 active
of 22 with agreements; top 3 did 100%
Created · redeemed
$18M · $0
over the fiscal year
Redemptions in kind
0%
creations 40% in kind
Creation unit
50,000
shares
Securities lending
authorized, none lent

From the fund's annual census filing with the SEC. In-kind redemptions are what let an ETF shed appreciated securities without realising gains.

ETF Profile
holdings as of 2026-11-30
Holdings
629
AUM
$1.0B
Provider
Nport
Inception
2002-05-17
Exchange
ARCX
Data As Of
2026-11-30
Expense Ratio
0.28%
Dividend Yield
3.87%
Distribution
Monthly
Recent distributions
Ex-Date Pay Date Amount Type
2026-10-01 2026-10-06 $0.0897 CD
2026-09-01 2026-09-04 $0.0937 CD
2026-08-03 2026-08-06 $0.1006 CD
2026-07-01 2026-07-07 $0.0964 CD
2026-06-01 2026-06-04 $0.0951 CD
2026-05-01 2026-05-06 $0.0944 CD
Asset Allocation
Top Holdings
top 50 of 629 holdings
Symbol Name Weight % Asset Class Country
— United States Treasury 12.01% Short-term investment US
— UMBS, TBA 2.21% Mortgage-backed US
— United States Treasury 1.83% Debt US
— Government National Mortgage Association 1.77% Mortgage-backed US
— United States Treasury 1.68% Debt US
— United States Treasury 1.64% Debt US
— United States Treasury 1.37% Debt US
— Government National Mortgage Association 1.32% Mortgage-backed US
— United States Treasury 1.31% Debt US
— United States Treasury 1.23% Debt US
— United States Treasury 1.14% Debt US
— FEDERAL HOME LOAN BANK 1.13% Debt US
— United States Treasury 1.09% Debt US
— UMBS, TBA 1.07% Mortgage-backed US
— UMBS, TBA 1.00% Mortgage-backed US
— United States Treasury 0.94% Debt US
— Japan Government Thirty Year Bonds 0.92% Debt JP
— United States Treasury 0.87% Debt US
— United States Treasury 0.83% Debt US
— United States Treasury 0.80% Debt US
— Government National Mortgage Association 0.79% Mortgage-backed US
— United States Treasury 0.78% Debt US
— United States Treasury 0.78% Debt US
— Government National Mortgage Association 0.77% Mortgage-backed US
— United States Treasury 0.74% Debt US
— United States Treasury 0.74% Debt US
— UMBS, TBA 0.71% Mortgage-backed US
— Fannie Mae 0.71% Mortgage-backed US
— United States Treasury 0.69% Debt US
— United States Treasury 0.66% Debt US
— United States Treasury 0.62% Debt US
— United States Treasury 0.60% Debt US
— United States Treasury 0.59% Debt US
— United States Treasury 0.59% Debt US
— Government National Mortgage Association 0.54% Mortgage-backed US
— United States Treasury 0.53% Debt US
— UMBS, TBA 0.53% Mortgage-backed US
— United States Treasury 0.50% Debt US
— Fannie Mae 0.49% Mortgage-backed US
— United States Treasury 0.48% Debt US
— Fannie Mae 0.47% Mortgage-backed US
— United States Treasury 0.45% Debt US
— Freddie Mac 0.45% Mortgage-backed US
— United States Treasury 0.45% Debt US
— United States Treasury 0.41% Debt US
— United States Treasury 0.40% Debt US
— United States Treasury 0.40% Debt US
— United States Treasury 0.40% Debt US
— United States Treasury 0.39% Debt US
— Fannie Mae 0.38% Mortgage-backed US
Non-Equity Breakdown
AB Core Bond ETF · NPORT-P period 2026-05-31 (filed 2026-07-24)
Net assets: $1.06B · 711 total positions · equity 0.00% · non-equity 109.86%
Non-equity holdings — 710 positions, 109.86% of NAV
Category Weight Value Positions
US Treasury 39.02% $412.1M 59
Corporate 31.68% $334.5M 357
Mortgage-backed (US Govt-Sponsored Entity) 15.58% $164.6M 124
Mortgage-backed (US Govt Agency) 5.75% $60.7M 13
ABS-O 4.62% $48.8M 63
Short-term investment 3.95% $41.7M 1
Mortgage-backed (Corporate) 2.72% $28.7M 38
CBO/CDO (Corporate) 2.19% $23.2M 15
Non-US Sovereign 1.90% $20.0M 9
US Govt-Sponsored Entity 1.24% $13.1M 4
Debt 0.66% $6.9M 8
Municipal 0.51% $5.4M 3
Derivative (interest rate) 0.04% $379197 8
Derivative (FX) 0.01% $76469 8
Chart
Seasonality
Month'25'26Avg
Jan--0.21%0.21%
Feb--1.88%1.88%
Mar---1.43%-1.43%
Apr--0.03%0.03%
May---0.03%-0.03%
Jun--0.41%0.41%
Jul---1.17%-1.17%
Aug--0.20%0.20%
Sep---2.70%-2.70%
Oct--0.18%*0.18%
Nov0.55%--0.55%
Dec-0.47%---0.47%
Total0.08%-2.46%-1.19%
* Only 2 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: $28.26
SMA 50: $28.71
SMA 200: $29.41
Current: $28.10
EMA 12: $28.14
EMA 26: $28.35
MACD: -0.2057 | Signal: 0.0113
BEARISH
ADX (14): 39.44
TREND
+DI: 19.31
−DI: 37.81

Momentum Oscillators

RSI (14): 35.51
NEUTRAL
Stoch %K: 24.89
Stoch %D: 20.56
Williams %R: -72.60

Volume & Volatility

BB Upper: $28.73
BB Lower: $27.79
NEUTRAL
OBV: -1,715,771
Vol SMA 20: 113,128
Vol ROC: -61.86%
ATR: $0.12
True Range: $0.07
HV 20: 5.8%
HV 30: 5.5%
HV 60: 4.9%

Data Summary

Data Points: 230
Last Updated:
Date Range: 2025-11-10T00:00:00 – 2026-10-09T00:00:00
AI Analysis

Click Frenzy-Pro™ for an AI analysis of this ticker.

Analysis includes technical indicators, news sentiment, risk assessment, and specific price levels to watch.

CORB Options Activity & IV Rank

Loading options activity...
Spread Scanner GPU

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: 0.1544
Alpha: -9.65%
Correlation: 0.4351
R-Squared: 18.9%
Stock Volatility: 4.5%
Market Volatility: 12.8%

Analysis Details

Benchmark: SPY
Data Points: 229
Period: 252 trading days
Interpretation:
Low volatility - stock moves less than market
Beta & Alpha Over Time

CORB 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.

5 filers36,272,493 shares$1.08B value
# Filer Shares Value % of Total % of Float Period
1 AllianceBernstein L.P. 36,186,624 $1.07B 99.76% — 2026-06-30
2 Jane Street Group, LLC Custodian 55,235 $1.63M 0.15% — 2026-06-30
3 Kestra Advisory Services, LLC 18,631 $550.54K 0.05% — 2026-06-30
4 Cresset Asset Management, LLC 11,980 $354.00K 0.03% — 2026-06-30
5 UBS Group AG Custodian 23 $680 <0.01% — 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