Portfolio Calculators

ETF Overlap Analyzer

If you hold several ETFs, this shows how much you are really concentrated in each stock, added up across all of them.

Calculated in your browser only · inputs are not saved

Enter your values and press Analyze

Most exposed stocks

Overlap between ETFs

The illusion of diversification

Five ETFs, but possibly the same stocks

If you hold an S&P 500 ETF, a Nasdaq 100 ETF and a big tech ETF together, you may be far more concentrated in NVIDIA, Apple and Microsoft than you think.

Choose ETFs
Pick the ETFs you hold from popular Korea-listed and US-listed ETFs, and enter the amount invested.
Total real exposure
For each stock, it adds up each ETF's weight × your amount invested to show how much you really hold.
Check the overlap
Shows how much two ETFs overlap as a percentage. Because it uses only top holdings, even ETFs tracking the same index can come out at 40 to 50%. Treat anything above 40% as a substantial overlap.

Stock exposure = Σ (ETF amount invested × weight of that stock) Overlap(A,B) = Σ min(weight of stock in A, weight of stock in B)

FAQ

What date is the holdings data from?

It is based on top holdings from fund managers' websites and public sources. The as-of date is shown at the bottom of the page. ETF holdings can change through rebalancing.

Can I compare Korea-listed US ETFs and US-listed ETFs together?

Yes. The same stock is grouped under the same ticker and added together. For example, the NVIDIA exposure of TIGER US S&P500 and VOO is summed.

If the overlap is high, should I sell one?

Not necessarily. But it means the diversification benefit is smaller than you expected, so you could consolidate into the one with lower fees or a better tax treatment.

Results are estimates based on your inputs and simplified assumptions, and are for reference only, not a basis for investment decisions.

Last updated: November 2, 2026