How to use this ETF overlap tool

Pick two ETFs and press compare. A high overlap score means the funds share many of the same top stocks. The score uses a symmetric denominator: shared sampled weight divided by the average sampled weight of both ETFs. That keeps VOO vs VTI equal to VTI vs VOO and makes the result easier to compare.

For example, VTI vs VOO often looks like a choice between the total U.S. stock market and the S&P 500. In practice, both funds are heavily driven by the largest U.S. companies. The smaller stocks inside VTI add breadth, but the core exposure can still be close. The same idea shows up in SPY vs VOO, where the funds track the same index but differ on costs and structure.

What ETF overlap means for your portfolio

ETF overlap is not automatically bad. It becomes a problem when you think you are diversified but your money is still concentrated in the same stocks, sectors, or investing style. Owning VOO, SPY, and another S&P 500 fund does not create three separate strategies. It mostly repeats the same large-cap U.S. exposure.

Overlap can also be intentional. A dividend investor may combine SCHD and VYM because they want more income-focused exposure while accepting that some holdings repeat. A covered-call income investor may compare SCHD vs JEPI or JEPI vs JEPQ because the funds behave differently even when a few large holdings overlap.

The useful question is simple: what job is each ETF doing? If two funds do the same job, the lower-cost or more tax-efficient choice may be enough. If they do different jobs, some overlap may be acceptable.

Quick overlap guidelines

• 70% or higher: the ETFs likely have very similar core exposure.
• 35% to 70%: there is meaningful overlap, but the funds may still differ by style, sector, or income strategy.
• Below 35%: the funds may add different exposure, but check fees, risk, and why you want both.

Before buying, review the official issuer holdings, expense ratio, tax profile, and fund objective. Investor.gov also has a plain-English guide to mutual funds and ETFs.

Data sources and review date

This calculator uses a curated sample of large holdings, rounded weights, and fund expense ratios refreshed on July 24, 2026. The sample uses each issuer holding date when available: VOO, VTI, VYM, JEPI, and JEPQ as of June 30, 2026; SPY, QQQ, and SCHD as of July 23, 2026. It is built for quick planning, not exact portfolio accounting. ETF holdings can update daily, so confirm current weights on the fund issuer site before you buy or rebalance.

• Vanguard VOO fund page
• State Street SPY fund page
• Vanguard VTI fund page
• Invesco QQQ fund page
• Schwab SCHD fund page
• Vanguard VYM fund page
• JPMorgan JEPI fund page
• JPMorgan JEPQ fund page

Common ETF overlap traps to watch for

The most common ETF overlap mistake is buying several funds that sound different but own the same large stocks. A portfolio with VOO, SPY, IVV, and another S&P 500 ETF may look like four choices, but it is mostly one choice repeated four times. That can make your account harder to manage without adding much new exposure.

A second trap is mixing a total market fund with a large-cap fund and assuming they are very different. VTI owns thousands of stocks, but the biggest companies still carry a lot of weight. If you add VOO on top of VTI, you may be increasing your bet on the same largest U.S. companies. That may be fine, but it should be a choice, not an accident.

A third trap is chasing popular funds after they have already done well. Many investors add QQQ because they want more growth, then forget that QQQ may already overlap with the technology and communication stocks inside their broad market ETF. If those stocks fall together, the portfolio may feel less diversified than it looked on paper.

How to pair ETFs by role

A simple way to use this ETF overlap calculator is to give every fund a clear job. One ETF might be your broad U.S. stock market core. Another might add international stocks, bonds, dividend income, or a small slice of growth exposure. If two funds have the same job and high overlap, you may not need both.

Start with the core fund first. For many investors, that could be a total market ETF, an S&P 500 ETF, or a target allocation fund. Then ask what is missing. If you want more dividend exposure, compare a dividend ETF against your core fund and decide whether the extra income focus is worth the overlap. If you want more growth exposure, compare QQQ or another growth fund against your core before adding it.

Also compare costs. Two ETFs can overlap heavily while charging different expense ratios. If the funds are doing almost the same thing, the lower-cost fund may be the cleaner choice. If the more expensive fund has a special role, such as an income strategy, make sure you understand what you are paying for.

What to do after you find high ETF overlap

If the overlap score is high, do not panic and sell everything. Use it as a signal to slow down and review your plan. Ask whether each ETF gives you something useful. A fund can still earn a spot if it changes your income, risk, taxes, or behavior in a way you actually want.

If two ETFs are nearly identical, consider simplifying. Fewer funds can make it easier to rebalance, track performance, and avoid accidental bets. Simpler portfolios can also make dollar-cost averaging easier because each new contribution has a clear destination. If you are still building your plan, try our DCA calculator to see how steady investing can work with a simple fund mix.

If the overlap is moderate, look deeper. Check sector weights, dividend yield, expense ratio, tax history, and fund objective. The overlap score tells you what holdings repeat. It does not tell you whether the fund fits your life. The best ETF pair is not always the one with the lowest overlap. It is the pair that matches your goal without adding clutter.

Bottom line on ETF overlap

ETF overlap is a quick way to check whether your portfolio is truly spreading risk or simply repeating the same idea. High overlap can be useful when you want to tilt harder toward a specific part of the market. It can be wasteful when it adds complexity without changing your exposure.

Use this tool as a first pass. Then read the issuer pages, compare costs, and decide what each ETF is supposed to do. If you cannot explain why a fund belongs in one sentence, it may not need to be there.

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