docs: market data and alternative data source pages - #62
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Market data: the vendor landscape for US equities and ETFs (daily panels and trade, quote and order-book data), futures, options, FX and crypto, with delisted coverage, adjustments, granularity, point-in-time index membership, access tier and ml4t-data support. Wrapped providers link to the existing provider comparison instead of repeating it. Alternative data: news and text, social, web and app, workforce, card transactions, foot traffic and satellite, ESG, supply chain, prediction markets and marketplaces, with history, what is documented about point-in-time behavior, access tier and ml4t-data support. Vendor facts verified September 2026; every external link checked. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01F6TR4nQDjiPtanA2n4F3Gw
…by-claim audit Every factual claim on both pages was checked against vendor documentation, press releases or, for PredictIt and Polymarket's US access, published reporting. Corrections: - Wrong dates: Databento OPRA starts April 2013 (not March 2023), Cboe DataShop options data starts January 2012, Advan Patterns+ history starts 2019, Orbital Insight sale was May 2024, Reddit paid API began July 2023. - Wrong coverage: Sharadar SEP counts tickers, not funds, and only its close is dividend and spin-off adjusted; AlgoSeek covers every listed US equity from 2007; TAQ from 1993 is Monthly TAQ, Daily TAQ starts September 2003; CRSP daily NYSE data starts July 1962; Neudata lists 7,000+ datasets. - Outdated: PredictIt now has CFTC approval as a regulated exchange; Polymarket's US access runs through QCEX since December 2025; the Zillow database has no catalog page and was last refreshed July 2025. - Filled from vendor docs: Alpaca spin-off adjustment, FirstRate and Norgate individual futures contracts, FactSet supply-chain history by region, CME DataMine per-contract files, Tardis tier windows. - Removed claims no public source supports (ORATS futures-option exclusion, S&P ESG counts and history, Sustainalytics score range, Panjiva history, Nasdaq Data Link publisher count, and others) or marked them not documented. - Kinetick and Benzinga links now point to pages that describe the product. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01F6TR4nQDjiPtanA2n4F3Gw
…e PredictIt The cited Polymarket release (2025-11-25) reports a CFTC amended order of designation for intermediated US access with launch to follow; it names no QCEX and no December access date, so the page no longer claims either. PredictIt's September 2025 approval now links the Bloomberg report. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01F6TR4nQDjiPtanA2n4F3Gw
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Adds
docs/providers/market_data.mdanddocs/providers/alternative_data.md: the vendor landscape beyond whatml4t-datawraps (US equities daily and tick, futures, options, FX, crypto; news, social, web and app, card, foot traffic, satellite and shipping, ESG, supply chain, prediction markets, marketplaces). Linked from the provider index and the nav next to the fundamentals page (#60).Verification (September 2026):
mkdocs build --strictpasses; pre-commit passes.🤖 Generated with Claude Code
https://claude.ai/code/session_01F6TR4nQDjiPtanA2n4F3Gw