Last updated: 2026-05-16

Data Sources and License Notice

Source ownership, data reuse limits, trademarks, and licensing risks.

Key summary

  • TapeFlow is not an exchange or licensed market-data vendor.
  • Market data, index names, company names, trademarks, and source links remain the property of their respective owners.
  • Bulk extraction, redistribution, resale, or commercial reuse may require separate permission from the original source.

1. Current sources

  • KRX for Korean market and flow data.
  • KOFIA FreeSIS for Korean margin-credit balances.
  • Bank of Korea ECOS for Korean prices, rates, money, external accounts, labor, housing, and equity-market statistics.
  • FRED for US prices, rates, labor, output, housing, and credit spreads.
  • The US Treasury for daily nominal and real yield curves.
  • Stooq for indexes, FX, commodities, and some historical data.
  • Yahoo Finance for selected indexes, commodities, crypto quotes, and long history.
  • LBMA for gold and silver benchmark prices, and Upbit for won-denominated crypto.
  • Cboe for VIX history and the put/call ratio, and FINRA for US margin debt.
  • Naver Finance for Korean stock radar data.
  • TradingView Screener for U.S. stock radar data.
  • Supabase, Cloudflare, and Google AdSense for storage, hosting, CDN, security, and ads.

2. Reuse limits

  • Normalization by TapeFlow does not remove the original data owner's restrictions.
  • Users should not copy TapeFlow data into a competing product, paid dataset, report feed, or automated trading system without checking source rights.
  • Source names are used for identification and do not imply affiliation, sponsorship, or endorsement.

3. Operating risks

  • External providers can change data formats, access methods, coverage, and terms, which may delay or remove some data.
  • Data that requires an official license must not be redistributed or commercially reused without the source provider's permission.
  • Source labels and links are provided so users can verify original materials.

Revision history

Pre-deployment legal baseline

Version 2026-05-16.1 · 2026-05-16

Prepared the Privacy Policy, Terms of Use, Data and Investment Risk Disclosure, Data Sources and License Notice, and Contact page as the deployment baseline.