Home > Compare > RSP vs VIIIX Holdings as of April 30, 2026 (RSP) and March 31, 2026 (VIIIX)

RSP vs VIIIX: Portfolio Overlap

Invesco S&P 500 Equal Weight ETF vs Vanguard Institutional Index Fund

46.3%

Weighted portfolio overlap

Moderate Overlap

Moderate Overlap. A recognisable amount of shared weight, common among funds drawing on the same large-cap pool. Much of it typically sits in the top conviction holdings.

RSP

503 equity holdings
as of April 30, 2026

VIIIX

503 equity holdings
as of March 31, 2026

501 stocks held in common

Overlap View Venn Diagram

Overlapping Holdings

10 Top 10 of 501 shared, by overlap contribution

#	Stock	RSP	VIIIX	Overlap%
1	INTC	0.38%	0.37%	0.37%
2	AMD	0.33%	0.59%	0.33%
3	TXN	0.27%	0.32%	0.27%
4	UNH	0.25%	0.44%	0.25%
5	GEV	0.25%	0.42%	0.25%
6	QCOM	0.26%	0.25%	0.25%
7	ADI	0.24%	0.28%	0.24%
8	CAT	0.24%	0.59%	0.24%
9	AMZN	0.24%	3.65%	0.24%
10	MU	0.24%	0.68%	0.24%

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

Only in RSP — Invesco S&P 500 Equal Weight ETF

Stock	Weight
CASY	0.21%
AMCR	0.17%

Only in VIIIX — VANGUARD INSTITUTIONAL INDEX FUND

Stock	Weight
AMCR	0.03%
HOLX	0.03%

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Frequently Asked Questions (FAQs)

What is the portfolio overlap between RSP and VIIIX?

RSP (Invesco S&P 500 Equal Weight ETF) and VIIIX (Vanguard Institutional Index Fund) share 46.3% portfolio overlap as of RSP's April 30, 2026 filing and VIIIX's March 31, 2026 filing, across 501 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 RSP and VIIIX invest in the same stocks?

Somewhat. The two funds share a meaningful set of stocks, though each also holds distinct positions the other does not.

What are the top stocks held by both RSP and VIIIX?

The most prominent shared holdings (by combined weight) are: INTC, AMD, TXN. See the full common-holdings table on this page for weights in each fund.

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