ETF comparison
SPMB vs TLT
US Aggregate Bond vs US Treasury (Long).
State Street SPDR Portfolio Mortgage Backed Bond ETF · iShares 20+ Year Treasury Bond ETF
Holdings overlap
0 positions appear in both funds. Buying equal dollars of SPMB and TLT would leave roughly 0.0% of each dollar exposed to the same underlying securities.
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.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
SPMB is 11 bps cheaper than TLT. On a $100,000 position that's about $110/yr more in fees for TLT.
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 SPMB vs TLT.
Top shared holdings
0 shared in totalNo shared holdings between these funds.
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%
Only in TLT
46 total- United States of America 4.58%
- United States of America 4.50%
- United States of America 4.46%
- United States of America 4.40%
- United States of America 4.15%
- United States of America 4.04%
- United States of America 4.03%
- United States of America 3.95%
- United States of America 3.94%
- United States of America 3.86%
Related comparisons
More comparisons with SPMB
- SPMB vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 0.0%
- SPMB vs VGSH · Vanguard Short-Term Treasury Index Fund ETF Shares 0.0%
- SPMB vs VTIP · Vanguard Short-Term Inflation-Protected Securities Index Fund ETF Shares 0.0%
- SPMB vs VUSB · Vanguard Ultra-Short Bond ETF 0.0%
- SPMB vs VMBS · Vanguard Mortgage-Backed Securities Index Fund ETF Shares 21.2%
- SPMB vs SPAB · State Street SPDR Portfolio Aggregate Bond ETF 18.0%
More comparisons with TLT
- TLT vs SPSB · State Street SPDR Portfolio Short Term Corporate Bond ETF 0.0%
- TLT vs SPTI · State Street SPDR Portfolio Intermediate Term Treasury ETF 0.0%
- TLT vs SPTS · State Street SPDR Portfolio Short Term Treasury ETF 0.0%
- TLT vs SRLN · State Street Blackstone Senior Loan ETF 0.0%
- TLT vs STIP · iShares 0-5 Year TIPS Bond ETF 0.0%
- TLT vs SUB · iShares Short-Term National Muni Bond ETF 0.0%
Percentages are holdings overlap with the named fund.
Open SPMB or TLT at a brokerage
Both funds trade commission-free at major US brokerages.
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.