Market Data, Tickers, and Screening Tools

Market data, tickers, and screening tools covers the symbols, feeds, tapes, scanners, and filtering tools used to find or monitor securities and market activity.

Use this branch when the evidence depends on a market-data field, ticker, tape, scanner, or screen rather than a confirmed trade. This content is educational and does not validate any vendor result or recommend a security.

What This Branch Covers

Decision Lens

Market-data tools are discovery evidence, not final proof. A ticker screen can point to a candidate, but the exact instrument, exchange, currency, quote condition, and timestamp still need confirmation.

Move to Securities Identifiers and Reference Data when the issue is exact instrument identity. Move to Quotes and Executable Prices when the issue is whether a price can trade.

Evaluation Checklist

• Identify the ticker, exchange, security identifier, data vendor, field definition, timestamp, and delay status.
• Check whether the tool uses consolidated, venue-specific, OTC, adjusted, or vendor-derived data.
• Confirm the screen universe and filters before interpreting omitted or included names.
• Watch for stale data, ticker changes, corporate actions, suspended securities, and duplicate listings.
• Use issuer, exchange, broker, or custodian records when the decision requires final evidence.

Common Mistakes

• Treating a scanner result as verified investment evidence.
• Confusing a ticker with the full security identity.
• Comparing vendor fields without checking definitions and update times.
• Ignoring adjusted versus unadjusted data after splits, dividends, or symbol changes.
• Using a broad screen result without checking liquidity, listing status, and tradeability.

For broader context, return to Quotes, Prices, and Market Data.

In this section

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