Bankster API / 6 articles
Data & access
What you can retrieve, what you can keep, and what the data can actually tell you.
Getting data is only the first boundary. A useful financial dataset also needs the right coverage, identifiers, timing and permission to retain it. These articles follow those conditions from a live feed to a historical model run.
Start with what an API actually delivers, then explore how revisions, licensing and database conventions change the conclusions you can draw.
A market-data endpoint does not define your coverage or rights. Understand feeds, timing, entitlements and the limits of API access.
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Saved code does not guarantee a repeatable model run. Data retention, access and licensing rights can determine what can be reproduced.
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A backtest must use what was knowable at the time. Separate event dates, publication times, revisions and historical data availability.
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LEI, ISIN, FIGI and MIC identify different things. Learn why matching an entity, security or venue does not establish permission.
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Knowing where data came from does not prove it is complete or correct. Compare lineage, quality checks and reconciliation.
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Shared file formats do not guarantee shared table behavior. Examine the catalogs, metadata and writer rules behind lakehouse interoperability.
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