SPMB vs SPY
5YState Street SPDR Portfolio Mortgage Backed Bond ETF · $7.0BState Street SPDR S&P 500 ETF · $778B
+5.8%3 years · per year$11,852 · $18,118+21.9%
+0.3%5 years · per year$10,149 · $17,493+11.8%
0.04%Expense ratio$4 · $9 on $10k · lower wins0.09%
4.25%12-mo yield$425 · $101 on $10k1.01%
−5.6%Worst dropSmaller wins−8.9%
4.7%VolatilityLower wins13.7%
4–2SPMB wins
$10,000 · 5 yearsAll three, one scale
Shared top holdingsSPMB · SPY
They share no top holdings, or holdings aren’t on file […]
Held in common[…]
End-of-day Nov 9, 2026 · $10,000 5 years ago, dividends reinvested · ● winner of the row · each row scaled to the bigger of the two