Transparency & Trust

Data Sources

CalculatorInvest uses third-party market data to power historical ROI calculators, performance rankings, and forecast simulations. This page explains where prices come from, how data is cached and updated, and the limitations you should know before relying on any result.

Last updated: June 2026 · Written by Dionis Ceban, founder of CalculatorInvest

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Third-party providers
Daily close prices
Locally cached for speed
Not real-time

Providers

Primary Data Providers

CalculatorInvest does not operate its own market data exchange. Historical prices are sourced from established third-party financial data providers and cached on our servers for fast, browser-based calculations.

Yahoo Finance

Yahoo Finance data sources are used across CalculatorInvest where applicable — particularly as a fallback when primary feeds are unavailable and for certain asset classes that require provider-specific ticker mapping.

Daily closing prices
Stocks, ETFs, indexes, forex, crypto & commodities
Fallback and supplemental coverage

Stooq & related feeds

Primary daily close data for many asset classes is built from Stooq and similar market feeds. Prebuilt JSON price files are stored locally and served to calculators for consistent, fast performance.

End-of-day historical prices
Stocks, crypto, forex, indexes & metals
Cached in /data/ JSON files

Select crypto assets may also use supplemental providers such as CoinGecko when Yahoo or Stooq coverage is limited. Provider attribution may appear on individual calculator pages where relevant.

Coverage

Market Data Coverage

CalculatorInvest tools cover major global asset classes. Availability varies by symbol — not every ticker has complete history across all date ranges.

Stocks & ETFs

Historical closing prices for individual stocks and exchange-traded funds, used in ROI, DCA, and comparison calculators.

Forex

Major currency pair exchange rates for historical return and performance analysis.

Indexes

Benchmark index levels including major US, European, and Asian market indices.

Commodities & Metals

Precious metals, energy, and agricultural futures where available from provider feeds.

Crypto

Digital asset daily closes with provider-specific ticker mapping for major coins and tokens.

Forecasts & rankings

Performance rankings and forecast scenarios derive from the same cached historical price datasets.

Processing

How Data Is Used

Fetched from providers

Daily closing prices are retrieved from third-party market data providers on a scheduled basis.
Cached locally

Prices are stored as JSON files so calculators load quickly without repeated external API calls during each visit.
Processed in your browser

Calculator inputs and results are computed client-side whenever possible. We do not store your entries on our servers.
Adjusted where supported

Corporate actions such as stock splits, and dividends where supported by the data source and asset type, may be reflected depending on availability.

Freshness

Update Frequency

Market data is refreshed on a regular schedule — typically daily — depending on provider availability and asset class. Homepage performance cards, rankings, and calculator date ranges all depend on these cached datasets.

After raw price updates, derived caches (performance summaries and rankings) are regenerated so percentages and leaderboards stay consistent across the site.

Displayed prices are end-of-day closes, not live streaming quotes. For time-sensitive decisions, always verify current prices with your broker or an official exchange feed.

Limitations

Data Quality and Limitations

Third-Party Data

Market information is obtained from external providers. CalculatorInvest is not affiliated with Yahoo Finance, Stooq, or other data vendors.

Delays & Gaps

Prices may contain delays, missing sessions, or discrepancies between providers depending on the symbol and date range.

Corporate Actions

Historical records may be affected by stock splits, dividends, and listing changes in ways that vary by asset and tool.

Data Revisions

Providers may revise historical values over time. Cached data reflects the last successful import, not necessarily the latest provider revision.

No Guarantee

CalculatorInvest does not guarantee completeness or accuracy. Verify important figures using official or primary sources.

Educational Purpose

CalculatorInvest provides educational tools and simulations powered by third-party market data.

Nothing on this website should be interpreted as investment, financial, tax, or legal advice.

Disclaimer · Privacy Policy · Terms

Frequently asked questions

5 questions · FAQ schema enabled

Where does CalculatorInvest get market data?

Historical prices are obtained from third-party financial data providers. Primary daily close data is built from Stooq and similar market feeds, with Yahoo Finance used as a fallback where needed. Select crypto assets may use supplemental providers such as CoinGecko when required.

Is market data real-time?

No. CalculatorInvest uses end-of-day (daily close) historical prices cached locally for fast calculator performance. Prices are not live streaming quotes and should not be used for real-time trading decisions.

How often is data updated?

Market data is refreshed on a regular schedule, typically daily, depending on provider availability and asset class. Cached JSON files power calculators and rankings across the site.

Are stock splits and dividends included?

Corporate actions such as stock splits, and dividends where supported by the data source and asset type, may be reflected depending on data availability. Treatment varies by tool — see the specific calculator page for details.

Can I rely on this data for financial decisions?

No. Data may contain delays, gaps, or revisions. CalculatorInvest does not guarantee completeness or accuracy. For important decisions, verify figures independently using official or primary sources.