# Extract Trading-Literature Entities

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Extract reusable infospace entities from the source chunk. Return one
Markdown bundle where each entity starts with `# Entity Title` and has a
`## Definition` section, plus a `## Category` line drawn from the list
below. Add `## Context` and `## Source Evidence` when the chunk gives
enough material; leave them out rather than inventing detail.

Allowed categories (use exactly one per entity):

- `trader` — a named operator, broker, manipulator, or counter-party
- `market` — a market, exchange, pit, or named instrument family
  (e.g. the New York Stock Exchange, the cotton market, the bucket-shop
  circuit)
- `strategy` — a named tactic, system, or recurring playbook
  (e.g. pyramiding, scale buying, tape reading)
- `error` — a recurring mistake, anti-pattern, or losing habit
- `psychological_pattern` — a named cognitive or emotional habit that
  drives decisions (e.g. tip-following, hope-against-evidence)
- `institution` — a firm, regulator, news organisation, or social venue
- `instrument` — a specific security, commodity, or contract
- `evidence_bearing_claim` — a concrete operator-level claim the text
  asserts and partially supports (e.g. "amateurs buy on tips, pros buy
  on tape"); preserve the supporting evidence in the body

Prefer entities that will recur across chapters. Avoid fictionalised
people whose role is purely narrative colour. Avoid wrapping a single
trade as an entity unless the trade is itself a teachable case.

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Source artifact: {{ input.artifact_id }}

## Source

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