Sources & coverage
Know what kind of evidence each source supplies.
SumWorth reports provider identity and evidence limits with results where available. Source availability and returned data can differ by feature, symbol, and date window. Provider metadata is shown as reported; SumWorth does not independently verify vendor data.
Historical price data and search
Yahoo Finance
Daily historical prices and instrument-search results; it can also supply headline metadata in News & Context.
The returned history, price basis, venue metadata and dates depend on the provider response. Availability, limits and terms are controlled upstream.
Alpha Vantage
A daily adjusted-history fallback for supported symbols when server configuration is available; it also supplies headline/news-sentiment results.
Its returned history depth and availability can depend on provider access and response limits. The result identifies Alpha Vantage when it supplies the selected history.
Massive
The codebase contains a daily U.S. stock-aggregate adapter, but it remains gated and is not a generally active source.
It is inactive unless account entitlements, permitted use, business-use terms and quote currency are confirmed. No current coverage promise is made.
Macro series, headlines, and product notes
FRED
Macroeconomic time-series observations shown in the macro-series research view; it is not a source of security price history.
Series definitions, dates, revisions and gaps are specific to each published series. Check the series context and dates in the result.
CoinGecko
Not enabled for the exchange-session price-analysis path.
SumWorth does not claim CoinGecko market-history or instrument-search coverage in that path.
SumWorth research notes
Original, read-only notes about research boundaries; these are product content, not third-party market data.
They do not provide a provider-backed market observation.
News & Context is a bounded headline index, not article analysis. Yahoo Finance and Alpha Vantage may supply headline metadata. The article body is not fetched or stored; publication times and coverage may be missing, partial, delayed, or provider-limited.
Coverage depends on the request
- Coverage varies by symbol, provider, and requested date window. A source that returned data for one symbol or period may return partial or no data for another.
- Read the actual result's requested window, observed dates, observation counts, price basis, missing-data handling, source and status. The evidence view describes the current Backtest result.
- Rolling or aggregate provider-health metrics summarize past observations across a sample. They are not a guarantee for an individual symbol, request, or date range.
- Displayed currency choices do not convert source-market prices. Check each result's currency caveat.