SPY vs SPYM: holdings overlap and fees
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Head-to-head
THE VERDICT
SPY and SPYM share 99% of their holdings by weight, near-identical baskets. Their expense ratios are 0.09% and 0.02%. SPYM is the cheaper of the two.
Holdings overlap · Σ min(weight in SPY, weight in SPYM)
Portfolio overlap
99%overlap
Shared holdings503
Total unique names503
In one, not the other0
Top shared holdings · weight in SPY / SPYM
Which 503 names both funds hold, at what weight, and which positions each fund weights more heavily, is on a paid plan.Premium · $119/yr · 7-day trial · cancel anytimeUnlock the shared names →
Heavier in SPY · Heavier in SPYM
Where each fund leans is withheld with the shared names above, on the same plan.
Portfolio look-through · “am I secretly all-in on one stock?”
Your holdings:
Overlap computed Oct 20, 2026 from each fund's published holdings via the weighted-minimum method. Bond and fund-of-funds holdings are excluded from look-through where disaggregation is unreliable. Decision-support, not a recommendation · Not investment advice.
More on these funds
SPY snapshot · SPY holdings · SPY income