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ETF comparison

FLOT vs SPMB

Both US Aggregate Bond.

iShares Floating Rate Bond ETF · State Street SPDR Portfolio Mortgage Backed Bond ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

0 positions appear in both funds. Buying equal dollars of FLOT and SPMB would leave roughly 0.0% of each dollar exposed to the same underlying securities.

FLOT unmatched 98.3% Shared 0.0% SPMB unmatched 98.1%

Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.

In FLOT only
545 positions
Shared
0 positions
In SPMB only
2,699 positions

Side by side

FLOT

iShares Floating Rate Bond ETF

iShares · US Aggregate Bond

84 composite / 100
Expense ratio
0.15%
Net assets
$11.12B
TTM yield
4.27%
Top-10 conc.
8.8%
SPMB

State Street SPDR Portfolio Mortgage Backed Bond ETF

State Street · US Aggregate Bond

87 composite / 100
Expense ratio
0.040%
Net assets
$6.82B
TTM yield
4.27%
Top-10 conc.
6.6%

Sub-score comparison

85
Cost
96
52
Tax efficiency
52
100
Liquidity
93
100
Concentration
100
—
Tracking quality
—
FLOT sub-score SPMB

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

SPMB is 11 bps cheaper than FLOT. On a $100,000 position that's about $110/yr more in fees for FLOT.

Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with FLOT vs SPMB.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in FLOT

545 total
  • EUROPEAN BK RECON & DEV 1.15%
  • INTL BK RECON & DEVELOP 1.05%
  • EUROPEAN BK RECON & DEV 0.95%
  • INTL BK RECON & DEVELOP 0.89%
  • EUROPEAN BK RECON & DEV 0.85%
  • INTL FINANCE CORP 0.82%
  • INTL BK RECON & DEVELOP 0.77%
  • INTL BK RECON & DEVELOP 0.77%
  • INTL BK RECON & DEVELOP 0.77%
  • INTER-AMERICAN DEVEL BK 0.76%

Only in SPMB

2,699 total
  • Freddie Mac 1.17%
  • Fannie Mae 0.79%
  • Freddie Mac 0.76%
  • UMBS, TBA 0.63%
  • Freddie Mac 0.61%
  • Freddie Mac 0.55%
  • Government National Mortgage Association 0.55%
  • Fannie Mae 0.51%
  • Fannie Mae 0.49%
  • Fannie Mae 0.47%

Related comparisons

More comparisons with FLOT

More comparisons with SPMB

Percentages are holdings overlap with the named fund.

Open FLOT or SPMB at a brokerage

Both funds trade commission-free at major US brokerages.

Open at Fidelity

Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.

Holdings overlap is the sum of min(weight_a, weight_b) over positions matched on ISIN (CUSIP fallback). Methodology: see /methodology/.

Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.