ETF and Mutual Fund Analysis

Holdings as of August 12, 2026

ETF and Mutual Fund Analysis

Overlap, Comparison, and Diversification for Your Portfolio

Home > Compare > BIL vs SPMB Holdings as of August 12, 2026

BIL vs SPMB: Portfolio Overlap

State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF vs State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF

0.1%
Weighted portfolio overlap
Low Overlap

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

BIL
20 equity holdings
as of August 12, 2026
SPMB
2722 equity holdings
as of August 12, 2026
2 stocks held in common
Overlap View Venn Diagram
0.1% OVERLAP BIL SPMB
Overlapping Holdings
2 Sorted by overlap contribution
# Stock BIL SPMB Overlap%
1
SSI US GOV MONEY MARKET CLASS
 0.06% 6.61% 0.06%
2
US DOLLAR
 0.00% 0.12% 0.00%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in BIL — State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF
StockWeight
TREASURY BILL 09/26 0.0000010.48%
TREASURY BILL 0 09/10/202610.21%
TREASURY BILL 10/26 0.000008.14%
TREASURY BILL 10/26 0.000007.42%
TREASURY BILL 09/26 0.000007.08%
Only in SPMB — State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF
StockWeight
FED HM LN PC POOL RQ0094 FR 02/56 FIXED 51.08%
FNMA TBA 30 YR 5.5 SINGLE FAMILY MORTGAGE0.91%
FNMA TBA 30 YR 5 SINGLE FAMILY MORTGAGE0.77%
FNMA POOL MA4547 FN 02/52 FIXED 20.72%
FED HM LN PC POOL RQ0041 FR 08/55 FIXED 60.70%

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Frequently Asked Questions (FAQs)
What is the portfolio overlap between BIL and SPMB?

BIL (State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF) and SPMB (State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF) share 0.1% portfolio overlap as of their August 12, 2026 filings, across 2 common stocks. 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 BIL and SPMB 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 BIL and SPMB?

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

Related Comparisons
BIL — State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF vs SPSB — State Street(R) SPDR(R) Portfolio Short Term Corporate Bond ETFSPHY — State Street(R) SPDR(R) Portfolio High Yield Bond ETF vs SPMB — State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETFBIL — State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF vs JNK — State Street(R) SPDR(R) Bloomberg High Yield Bond ETFBIL — State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF vs SPAB — State Street(R) SPDR(R) Portfolio Aggregate Bond ETFBIL — State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF vs SPHY — State Street(R) SPDR(R) Portfolio High Yield Bond ETFBIL — State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF vs SPTI — State Street(R) SPDR(R) Portfolio Intermediate Term Treasury ETF