SPMB vs SPTL: Portfolio Overlap

State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF vs State Street(R) SPDR(R) Portfolio Long Term Treasury ETF

0.0%

Weighted portfolio overlap

Low Overlap

Low Overlap. The two portfolios have highly distinct allocations: little of the weight sits in the same stocks.

SPMB

2722 equity holdings
as of August 12, 2026

SPTL

100 equity holdings
as of August 12, 2026

1 stocks held in common

Overlap View Venn Diagram

Overlapping Holdings

1 Sorted by overlap contribution

#	Stock	SPMB	SPTL	Overlap%
1	SSI US GOV MONEY MARKET CLASS	6.61%	0.03%	0.03%

Most Divergent Holdings Stocks held by one fund but absent from the other

Only in SPMB — State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF

Stock	Weight
FED HM LN PC POOL RQ0094 FR 02/56 FIXED 5	1.08%
FNMA TBA 30 YR 5.5 SINGLE FAMILY MORTGAGE	0.91%
FNMA TBA 30 YR 5 SINGLE FAMILY MORTGAGE	0.77%
FNMA POOL MA4547 FN 02/52 FIXED 2	0.72%
FED HM LN PC POOL RQ0041 FR 08/55 FIXED 6	0.70%

Only in SPTL — State Street(R) SPDR(R) Portfolio Long Term Treasury ETF

Stock	Weight
US TREASURY N/B 05/56 5	2.31%
US TREASURY N/B 08/55 4.75	2.22%
US TREASURY N/B 02/56 4.75	2.21%
US TREASURY N/B 05/55 4.75	2.17%
US TREASURY N/B 05/54 4.625	2.13%

Frequently Asked Questions (FAQs)

What is the portfolio overlap between SPMB and SPTL?

SPMB (State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF) and SPTL (State Street(R) SPDR(R) Portfolio Long Term Treasury ETF) share 0.0% portfolio overlap as of their August 12, 2026 filings, across 1 common stock. Overlap is the sum of the smaller weight of each shared stock, so it reads as the share of a dollar that lands on the same companies in both funds.

Do SPMB and SPTL invest in the same stocks?

Mostly not. Only a small portion of their portfolios overlaps — these funds hold largely different stocks and genuinely diversify each other.

What are the top stocks held by both SPMB and SPTL?

The most prominent shared holdings (by combined weight) are: SSI US GOV MONEY MARKET CLASS. See the full common-holdings table on this page for weights in each fund.

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