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Free ETF overlap calculator for supported US and UCITS funds. Measure portfolio overlap through shared holdings, combined stock weights, and sector exposure from official holdings data.
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The Same Stocks, Bought Twice: How Much Popular ETFs Really Overlap
We ran the holdings of 15 popular US ETFs through a look-through analysis. VOO and IVV have 99.6% holdings-weight overlap; an equal-weight VOO, QQQ, and SCHD example puts 28% in ten stocks. (July 2026)
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