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Authority bias and expert pronouncements in event markets

When a famous economist, a central banker or a senior official makes a prediction, event prices can jump. Sometimes that is justified: the speaker may have inside knowledge or control over the outcome. Often it is authority bias, the habit of giving extra weight to people with status regardless of their record on the question at hand. This SoftCta guide explains how to separate the two.

What authority bias looks like

Authority bias shows up when readers:

• Treat a confident prediction from a well-known figure as near certain.
• Assume expertise in one field carries over to another.
• Give more weight to titles than to evidence.
• Follow a price move because "the experts" are said to agree, which can start a cascade.

What the research says

Philip Tetlock's long study of expert political and economic forecasts found that many experts did only modestly better than simple rules, and that famous experts were often less accurate. His later work on superforecasters showed that careful habits, such as using base rates, updating gradually and stating probabilities, mattered more than credentials. Our superforecasting guide covers these habits.

When authority carries real information

Not every statement is mere opinion. Weight it more when the speaker:

• Controls the outcome: a central bank chair signalling the next rate decision, or a party leader announcing a vote schedule.
• Has access to non-public facts: a statistics office describing a known data issue.
• Has a measured record: a forecaster with a published, scored track record on similar questions.

Even then, separate statements of intent from actions. Contracts usually settle on formal actions, such as a signed order, a published decision or a vote, not on what an official said was likely.

Domain limits

A Nobel prize in physics does not confer expertise on elections, and a celebrated investor is not an authority on public health. When a well-known person comments outside their field, their status adds little. Ask whether the claim falls within their demonstrated expertise.

Vague language and hedges

Expert statements are often vague: "there is a real risk," "it's quite possible." These phrases can mean anything from 10% to 70%. Our guide on estimative language explains how to translate them. Experts can also be overconfident, as our overconfidence guide shows.

Unnamed officials

Reports citing "a senior official" or "people familiar with the matter" borrow authority without accountability. They can be accurate, but they can also be trial balloons or partial information. Our guide on primary sources explains how to trace claims back to documents.

A scoring routine

When a pronouncement moves a price, ask:

• Does the speaker control the outcome or only comment on it?
• Is the claim inside their field?
• Did they state a probability or only a direction?
• Do they have a public track record on similar questions?
• What incentives might shape their statement?
• Does the contract settle on their words or on a later action?

Write your own probability before and after, and record why it moved. Convert prices with the implied probability tool and verify live prices on the venue.

Primary sources SoftCta readers open

• Philip Tetlock, Expert Political Judgment and Superforecasting
• Transcripts of official speeches and press conferences
• Published forecaster track records and scoring
• Official decision documents that settle contracts

Reading the quote step by step

• Read the full title and rules, including the named settlement source and the time zone.
• Convert the Yes and No prices to implied probabilities and note the gap between them.
• Subtract fees and spread to see the effective price you would actually face.
• Write your own probability range and the evidence behind it, then compare.
• Check related and near-duplicate markets on other venues for consistency.

Closing SoftCta checklist

• Re-read the venue definition in your own words before reacting to a price.
• Convert prices with fee and spread awareness; verify live cents on the operator.
• Prefer primary settlement sources over secondary headlines and social summaries.
• Treat ChanceWire hubs, movers, and tools as orientation — not order entry.
• Confirm age, location, and product eligibility; SoftCta pages will not suggest location spoofing.
• If clarity is incomplete, watching is a complete SoftCta outcome — no pick-selling urgency required.

SoftCta habits

• Write your own probability range before checking the crowd price.
• Prefer dated primary sources over social summaries.
• Compare related markets when a single book looks extreme.
• Size curiosity with fees and depth in mind; substantial risk of loss.