Terms of service

Effective 2026-07-29. Using marketparquet.com or its data means you accept these terms. They are deliberately short -- please actually read them.

The service

MarketParquet ("we") sells downloadable historical market data -- OHLCV bars for US stocks, ETFs, and futures in Apache Parquet format -- plus a free sample tier and an optional "Keep Current" update subscription. What each product contains is described on the pricing page; how the data is built is described on the methodology page. We do not sell real-time data, tick data, options data, or fundamentals.

Accounts

  • You need an account (email + password, or Google sign-in) to download data. Keep your credentials private; activity under your account is your responsibility.
  • One account per person or organization. Credential sharing outside your organization is grounds for suspension.
  • You must provide a working email address -- it is how purchases are delivered and billing problems are resolved.

Purchases & billing

  • Payments are processed by Stripe; we never see or store card numbers.
  • The archive is a one-time purchase. Keep Current is a recurring subscription you can cancel anytime from the billing page -- cancellation stops future charges and you keep data already delivered.
  • All sales are final: see the refund policy for the reasoning and the billing-error exceptions we always honor.
  • Prices may change; changes never apply retroactively to a completed purchase.

Data license & acceptable use

  • Data use is governed by the data license: personal trading, research, and internal business use are allowed; redistribution of the raw files is not.
  • Don't abuse the service: no scraping the site in lieu of buying, no attempting to access data you have not purchased, no interfering with the service's operation.
  • We may throttle or suspend accounts that violate these terms, and will say why when we do.

Disclaimers

The data is provided "as is", for informational and research purposes only. It is not investment advice, and nothing on this site is a recommendation to buy or sell any security. While our quality controls are documented and extensive, market data is inherently imperfect and we do not warrant that it is complete or error-free. To the maximum extent permitted by law, our total liability for any claim arising from the service is limited to the amount you paid us in the twelve months before the claim. Trading involves risk of loss; decisions you make with the data are yours.

Changes & contact

We may update these terms; material changes will be noted by updating the effective date above, and continued use after a change is acceptance. Questions: [email protected]. See also the privacy policy.