Compare two plain stock-name lists and see how many names appear in both. Use this checker to review diversification and possible duplication without storing your lists.
Last updated: May 24, 2026
This calculator provides estimates based on the information entered by the user and the assumptions used in the calculation. Actual outcomes may vary due to market conditions, fees, taxes, inflation, lender rules, employer policies, and other factors. Results should be used for informational and educational purposes only and should not be considered financial, tax, investment, legal, lending, or professional advice.
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Portfolio overlap happens when two funds, watchlists, or stock portfolios contain the same names. Some overlap is normal, but too much duplication can reduce diversification and increase concentration in the same companies.
The FinCalX portfolio overlap checker compares two plain-text lists and shows common names, list counts, and an overlap percentage. It is a quick screening tool, not a complete risk analysis platform.
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Paste one stock or fund name per line in each box, then click Check Overlap. The tool normalizes names, compares both lists, and identifies entries that appear in both portfolios.
The result shows the number of names in each list, the overlap percentage, and the common names found. It does not analyze allocation size, market value, sector exposure, or fund quality.
Overlap % = Common unique names / Total unique names x 100
Common unique names are entries found in both lists. Total unique names are the combined distinct names across both lists after removing duplicates.
Suppose Portfolio A has Reliance Industries, TCS, HDFC Bank, Infosys, and ICICI Bank. Portfolio B has TCS, Infosys, Axis Bank, ITC, and SBI. The common names are TCS and Infosys.
There are 8 unique names across both portfolios and 2 common names, so overlap is 2 / 8 x 100 = 25%. This means one quarter of the combined name list is duplicated.
Use the overlap checker before adding a new mutual fund, comparing two watchlists, reviewing family portfolios, or checking whether multiple funds are giving you similar exposure.
It is a helpful first screen when your portfolio has grown through many small purchases and you want to understand duplication before doing deeper research.
Review holdings periodically, especially after adding a fund. If overlap is high, check whether the second fund adds a different style, sector, market cap, or asset class.
This tool compares names only. It does not account for allocation weight, sector exposure, cash positions, fund manager style, expense ratio, taxation, or liquidity.
Mutual fund investors, DIY stock investors, financial literacy learners, families consolidating holdings, and students studying diversification can use this tool for quick screening.
The portfolio overlap checker compares two plain-text lists of stock or fund names and identifies common holdings. It is useful when checking whether two portfolios are truly diversified or whether multiple funds contain similar securities. This tool compares names only and does not analyze allocation, weight, market value, sector exposure, price movement, or portfolio risk.
Overlap % = Common unique names / Total unique names x 100
Names are normalized for comparison, but holdings and weights are not considered.
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