ETF comparison
SHY vs SPMB
US Treasury (Short) vs US Aggregate Bond.
iShares 1-3 Year Treasury Bond ETF · State Street SPDR Portfolio Mortgage Backed Bond ETF
Holdings overlap
0 positions appear in both funds. Buying equal dollars of SHY and SPMB 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 SHY. On a $100,000 position that's about $110/yr more in fees for SHY.
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 SHY vs SPMB.
Top shared holdings
0 shared in totalNo shared holdings between these funds.
Only in SHY
89 total- United States of America 1.96%
- United States of America 1.84%
- United States of America 1.71%
- United States of America 1.60%
- United States of America 1.60%
- United States of America 1.52%
- United States of America 1.48%
- United States of America 1.45%
- United States of America 1.43%
- United States of America 1.40%
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 SHY
- SHY vs SPSB · State Street SPDR Portfolio Short Term Corporate Bond ETF 0.0%
- SHY vs SPTI · State Street SPDR Portfolio Intermediate Term Treasury ETF 0.0%
- SHY vs SPTL · State Street SPDR Portfolio Long Term Treasury ETF 0.0%
- SHY vs SRLN · State Street Blackstone Senior Loan ETF 0.0%
- SHY vs STIP · iShares 0-5 Year TIPS Bond ETF 0.0%
- SHY vs SUB · iShares Short-Term National Muni Bond ETF 0.0%
More comparisons with SPMB
- SPMB vs TIP · iShares TIPS Bond ETF 0.0%
- SPMB vs TLT · iShares 20+ Year Treasury Bond ETF 0.0%
- 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%
Percentages are holdings overlap with the named fund.
Open SHY or SPMB 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.