Skip to content
etf.net

GISC vs MBB

Guggenheim Securitized Income ETF

GISCDNYSE Arca

iShares MBS ETF

MBBANasdaq

Overlap

No data

Expense ratio

MBB −0.43pt a year

GISC0.47%MBB0.04%

Avg volume · 30D

MBB 461.6×the volume

GISC9.16KMBB4.23M

GISC vs MBB Performance

Jul 31, 2026 – Oct 30, 2026

+0.2%GISC+0.2%MBB

Jul 31, 2026 to Oct 30, 2026. GISC +0.2%. MBB +0.2%. Use the arrow keys to read each point.−3%−2%−1%1%Jul 2026Sep 2026Oct 2026
Expense ratio
GISC 0.47%
MBB 0.04%, better
Fund size
GISC $93M
MBB $35.9B
1Y total return
GISC No data
MBB +0.6%
Yield (12M)
GISC No data
MBB 4.42%
Holdings
GISC 52
MBB 10814
Avg volume (30D)
GISC 9.16K sh
MBB 4.23M sh, better
NAV per share
GISC $49.54
MBB $91.96
52W range

ETF.net Grade

GISC: Cost 27, Risk 60, Mission not scored, Tradability 23, Holdings 20, Durability 13. MBB: Cost 94, Risk 34, Mission 56, Tradability 89, Holdings 77, Durability 92.
Pillar letters and Scores for GISC, MBB, with each pillar’s weight
PillarGISCMBB
Cost30% weightD27A94Higher
Mission25% weightNot scoredB56
Risk15% weightB60HigherD34
Tradability15% weightF23A89Higher
Holdings10% weightF20A77Higher
Durability5% weightF13A92Higher

Rank among Mortgage-Backed Securities funds

How we build Categories ›
Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

Same Category. GISC and MBB are both graded against the same 24 Mortgage-Backed Securities funds, so their Grades compare head to head.

Mortgage-Backed Securities⁠

Category · 24 funds
See all 24 ›

MBB ranks 2nd and GISC 21st of 24 funds in the Mortgage-Backed Securities Category.

  1. Rank 1ASPMBState Street SPDR Portfolio Mortgage Backed Bond ETFScore 75
  2. Rank 2AMBBiShares MBS ETFScore 73
  3. Rank 3AVMBSVanguard Mortgage-Backed Securities ETFScore 72
  4. Rank 20DPMBSPIMCO Mortgage-Backed Securities Active Exchange-Traded FundScore 32
  5. Rank 21DGISCGuggenheim Securitized Income ETFScore 31
  6. Rank 21DMBSAngel Oak Mortgage-Backed Securities ETFScore 31
  7. MBSFNot yet graded
  8. MBSXNot yet graded

Our read on each fund

ETF.net Research

GISCDGuggenheim Securitized Income ETF

MBBAiShares MBS ETF

In short

GISC No data

MBB Launched in 2007, MBB is the plain-vanilla way to own U.S. agency mortgage bonds: one of the biggest and busiest funds in a small niche, tracking the Bloomberg U.S. MBS Index for four basis points.

Stated mandate

GISC No data

MBB The fund seeks to track an index composed of U.S. agency mortgage-backed securities.

Why people hold it

GISC No data

  • MBB Four basis points to rent the entire agency mortgage market, against a category median near 0.35%. In low-coupon bond land, that gap compounds quietly.
  • Scale is the real feature: one of the largest and most actively traded funds in the mortgage-bond category, which generally shows up as tighter spreads.
  • Pays monthly, and the mandate stays narrow: an index of U.S. agency mortgage-backed securities, nothing exotic bolted on.
  • Among the stronger builds in a thin peer group of mortgage-bond ETFs, on the combination of cost, trading friction and issuer staying power.

Worth knowing

GISC No data

  • MBB This is one slice of the bond market. Agency mortgage paper only, with no Treasuries or corporates alongside it.
  • Mortgage bonds cut both ways with rates: borrowers refinance when yields fall and sit tight when they rise, so the portfolio's duration shifts underneath you.
  • On price it's a photo finish: SPMB tracks the same index at the same 0.04%, and VMBS runs a basis point cheaper.

Full GISC profile⁠

Full MBB profile⁠

GISC vs MBB Holdings

How we measure overlap

Each holding counts at its smaller weight in the two funds, summed over the full Holdings. Sector, country and asset class use the same rule on each fund’s split. Cash, FX and derivative lines stay out of the counts. Two bond funds get no overlap figure.

GISC vs MBB Cost

Overpaying GISC vs MBB

$8,569

On $10,000 over 30 years. 7% growth a year before fees, expense ratio only.

  • GISC 0.47%

    $9,418

  • MBB 0.04%

    $849

$10,000
30 years

Cost over time

  • GISC 0.47%
  • MBB 0.04%
  • Overpaying
One line per fund, from year 0 to year 30. Use the arrow keys to read each point.$0$2K$4K$6K$8K$10K051015202530GISC $9,418MBB $849

Year by year

YearGISCMBBOverpaying
10$847$73$774
20$3,261$288$2,973
30$9,418$849$8,569

Expense ratio

  • 0.47%GISC
  • 0.04%MBB, cheaper
  • Middle half of Mortgage-Backed Securities funds
  • Median 0.38%

MBB 3rd cheapest of 24 funds

GISC 19th cheapest of 24 funds

GISC vs MBB Dividends

Last 12 months to Oct 30, 2026
Yield (12M)
GISC No data
MBB 4.42%
Payout (12M)
GISC No data
MBB $4.07
Last payment
GISC $0.20
MBB $0.37
Ex-dividend
GISC Oct 5, 2026
MBB Oct 1, 2026
Paid on
GISC Oct 9, 2026
MBB Oct 6, 2026
Frequency
GISC Monthly
MBB Monthly

Distribution history

Per share, 2023 to 2026, same scale for both

GISCMonthly · 3 paymentsAll GISC payments⁠
One bar per payment. 3 payments from 2023 to 2026 YTD. Aug 5, 2026 $0.32; Sep 3, 2026 $0.22; Oct 5, 2026 $0.20. Use the arrow keys to read each point.$0$0.2520232026YTD
MBBMonthly · 45 paymentsAll MBB payments⁠
One bar per payment. 45 payments from 2023 to 2026 YTD. Feb 1, 2023 $0.24; Mar 1, 2023 $0.25; Apr 3, 2023 $0.25; May 1, 2023 $0.26; Jun 1, 2023 $0.27; Jul 3, 2023 $0.26; Aug 1, 2023 $0.28; Sep 1, 2023 $0.26; Oct 2, 2023 $0.29; Nov 1, 2023 $0.27; Dec 1, 2023 $0.28; Dec 14, 2023 $0.28; Feb 1, 2024 $0.30; Mar 1, 2024 $0.29; Apr 1, 2024 $0.28; May 1, 2024 $0.28; Jun 3, 2024 $0.30; Jul 1, 2024 $0.31; Aug 1, 2024 $0.31; Sep 3, 2024 $0.32; Oct 1, 2024 $0.31; Nov 1, 2024 $0.31; Dec 2, 2024 $0.31; Dec 18, 2024 $0.29; Feb 3, 2025 $0.34; Mar 3, 2025 $0.32; Apr 1, 2025 $0.33; May 1, 2025 $0.33; Jun 2, 2025 $0.33; Jul 1, 2025 $0.33; Aug 1, 2025 $0.33; Sep 2, 2025 $0.34; Oct 1, 2025 $0.34; Nov 3, 2025 $0.34; Dec 1, 2025 $0.35; Dec 19, 2025 $0.33; Feb 2, 2026 $0.33; Mar 2, 2026 $0.33; Apr 1, 2026 $0.33; May 1, 2026 $0.33; Jun 1, 2026 $0.33; Jul 1, 2026 $0.34; Aug 3, 2026 $0.34; Sep 1, 2026 $0.34; Oct 1, 2026 $0.37. Use the arrow keys to read each point.$0$0.2520232026YTD

GISC vs MBB Risk

Fall from peak · 5 years

This chart needs five years of history for both funds.

Risk facts

VolatilityStd dev, 3 years
GISC No dataMBB 6.4%
Return per unit of riskSharpe ratio, 3 years
GISC No dataMBB 0.30
Worst fallMax drawdown, 5 years
GISC No dataMBB −16.8%
Market sensitivityBeta, 5 years
GISC 0.25MBB 1.14

GISC and MBB in the news

All news⁠

Popular comparisons

  • GISCDvsSPMBA

    Guggenheim Securitized Income ETF · State Street SPDR Portfolio Mortgage Backed Bond ETF

    Expense ratio
    0.47% · 0.04%
    Category
    Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

  • MBBAvsSPMBA

    iShares MBS ETF · State Street SPDR Portfolio Mortgage Backed Bond ETF

    Expense ratio
    0.04% · 0.04%
    Category
    Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

  • GISCDvsVMBSA

    Guggenheim Securitized Income ETF · Vanguard Mortgage-Backed Securities ETF

    Expense ratio
    0.47% · 0.03%
    Category
    Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

  • MBBAvsVMBSA

    iShares MBS ETF · Vanguard Mortgage-Backed Securities ETF

    Expense ratio
    0.04% · 0.03%
    Category
    Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

  • GISCDvsSMBSA

    Guggenheim Securitized Income ETF · Schwab Mortgage-Backed Securities ETF

    Expense ratio
    0.47% · 0.03%
    Category
    Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

  • MBBAvsSMBSA

    iShares MBS ETF · Schwab Mortgage-Backed Securities ETF

    Expense ratio
    0.04% · 0.03%
    Category
    Same Category. Both funds are graded against the same funds, so their Grades compare head to head.