Screen a sector by published market capitalization

Why use this

1. A financial researcher screening a sector may encounter company names, tickers and capitalizations that differ by listing or observation date. A range filter can appear precise while mixing currencies or stale figures.

2. This job could organize a transparent screen with the comparison basis and source dates visible. The result should help the reader inspect the chosen universe, rather than implying that a company fits an investment objective merely because it falls inside a size range.

Why an agent / simpler alternative

Useful judgment

Resolve listed-company identity, align capitalization basis and explain ambiguous sector classification.

Simpler alternative

Use a financial data provider's built-in screen when the universe and definitions are already suitable.

Unsuitable when

The task would recommend investments, infer suitability or trade on unverified screening data.

Proposed inputs

1. Name

   Screen definition

   Owner

   Research owner

   Minimum scope

   Sector scope, capitalization range and comparison currency

   Quality check

   Define inclusions and treatment of multiple listings

2. Name

   Published market data

   Owner

   Permitted source

   Minimum scope

   Company IDs, tickers, countries, values and dates

   Quality check

   Check listing identity and units

Access and setup — proposed or unknown

Proposed minimum

1. Use fictional company rows and a proposed screen; no live market-data retrieval, broker access or financial action.

Compatibility unknowns

1. Current data freshness, sector taxonomy, licensing and runtime compatibility are unknown.

External actions requiring approval

1. Paid data access, sharing private investment context and any financial transaction requires appropriate authorization.

Expected deliverable and review checks

Proposed artifact

Screening-table candidate with inclusion rationale, currency/date basis and unresolved classification or identity questions.

Critical checks

1. Avoid mixing capitalization definitions/currencies; preserve borderline and stale entries; distinguish country labels from exchange location.

Missing output evidence

This overlay adds no new output inspection, execution or validation; consult the referenced canonical source outcome limits.

Failure signals and proposed responses

1. Signal

   The same company appears under two listings

   Why it matters

   The screen double-counts an entity

   Proposed response

   Group by verified company identity and explain listing choices.

2. Signal

   One value is expressed in different units

   Why it matters

   The range filter produces a false match

   Proposed response

   Normalize documented units or hold the row.

Effort and cost — unknown

Setup work

1. Define the universe and comparable value basis.

Ongoing review

1. Researcher verifies current figures before consequential use.

Unknowns

1. Data latency, classification quality, licensing and research costs are unknown.

First check — proposed, unexecuted

Status

proposed_unexecuted

Synthetic fixture

Invent six listed-company rows with duplicate listings, mixed units and one stale date; prepare a provisional screen.

Acceptance checks

1. Flag duplicates/units; preserve dates; make no investment ranking or trade suggestion.

Stop conditions

1. Stop if identity or the capitalization basis cannot be established.

Limits

1. A sector screen cannot establish valuation, financial quality or suitability for any investor.