Intermediate
5 min read

Evidence Levels and Missing Data

Not all evidence is equal, and missing evidence should never be treated as neutral.

What you'll learn

  • Grade evidence by quality
  • Apply point-in-time discipline
  • Treat missing data as missing, not neutral

Optional supplemental lesson. It doesn't count toward the certificate. Suggested after Lesson 6.6: Market and Business Risk.

Back to Lesson 6.6

Grading evidence

Ask what kind of thing each claim actually is.

  • Reported fact from a regulatory filing
  • Derived measure calculated from reported facts
  • Estimate or projection made by someone
  • Opinion, narrative or expectation

Point-in-time discipline

Research is only honest if it uses information that was actually available at the time. Using later-known information to evaluate an earlier moment — lookahead bias — makes any analysis look far better than reality.

This is why our own research records the date each piece of evidence became available and evaluates companies only on what was known then.

Missing data stays missing

When evidence is unavailable, our platform labels it unavailable rather than substituting an assumption or an average. A company is never ranked using evidence it does not have.

Why this matters

Filling gaps with assumptions is how confident, wrong conclusions get built.

Terms used in this lesson

Select a term to read its definition.

  • Point-in-time

    Using only the information that was genuinely available on a given historical date.

    View in the glossary
  • Lookahead bias

    Using information in an analysis that was not actually available at the time being analysed.

    View in the glossary
  • Coverage

    How much reliable evidence exists for a company. Low coverage means less can be assessed.

    View in the glossary
  • Data freshness

    How recent data is compared with when you are using it. Research should show the date the data was observed, not just when the page loaded.

    View in the glossary
See the full glossary

Key takeaways

  • Not all evidence is equal.
  • Use only what was known at the time you are analyzing.
  • Missing evidence is shown as missing, never filled in.
Written by
Pro Investor Academy Research Team
Content type
Educational article
Published
2026-09-13
Last reviewed
2026-09-13

Sources

Educational content only. This lesson is not investment, tax or legal advice and does not recommend buying or selling any specific investment. All investing involves the risk of loss.