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Premortem and exit rules before entering a market

Most bad decisions in event markets happen after entry, when a headline lands and there is no plan. A premortem moves some of that thinking earlier. Before opening a position, you assume it has already failed and ask why. Then you write a few exit rules in plain language. The exercise is borrowed from project management and decision research, and it fits prediction markets well because every contract has a defined end and a written rulebook.

Running the premortem

Set a timer for five minutes. Write: "It is settlement day and my view was wrong. The most likely reasons were…" Typical answers include a rule detail you misread, a resolution source you did not check, a scheduled event you forgot, or simply that the base rate was against you. Each reason becomes something to verify now, using the resolution criteria checklist and the venue's rulebook.

Writing exit rules

Good exit rules are specific and tied to information, not to your entry price. Examples: "Reassess if the official source publishes X." "Reassess if the price moves past 25% without news I can find." "Leave it alone during the final hour unless rules change." Avoid rules framed around getting back to even; that is the sunk cost trap.

Reviewing without hindsight

After resolution, compare what happened with your premortem list. Did one of your listed failure modes occur? Did something unlisted? The point is to judge the process, not the outcome — a good process can lose and a sloppy one can win. See outcome bias and hindsight. Store the notes in your reading journal.

When the premortem says wait

Sometimes the list reveals that the rules are unclear or the key source is unknown. That is a useful finding. Watching a market without a position is a complete SoftCta outcome.

A worked example

Before a position on whether a central bank cuts rates at its next meeting, a reader writes three failure modes: an inflation print surprises higher, a key official signals patience, or the contract counts only cuts of a specific size. The third item sends them back to the rulebook, where they find that a smaller cut would resolve No. That single finding, discovered before entry, changes the whole picture. Their exit rules: reassess after the inflation print, and after any speech by the chair. Prices here are illustrative only — verify live on the operator.

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.

Common mistakes

Skipping the premortem when excited. Writing exits relative to entry price. Judging the process only by the result. Ignoring rule ambiguity the premortem revealed. Substantial risk of loss.

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

• Run a five-minute premortem before any position.
• Tie exit rules to information and probabilities.
• Review the process after resolution, not just the outcome.
• ChanceWire does not execute trades.
• Verify live prices and rules on the operator.

Where ChanceWire fits

ChanceWire explains decision-process habits for event markets; tools handle conversions such as implied probability. Venues such as Polymarket and Kalshi hold live quotes and rules — verify live.

Published 9 October 2026 (Asia/Nicosia). Informational only. Not financial, legal, investment, or tax advice. Rules and fees change — verify on the operator’s site. SoftCta only: ChanceWire does not execute trades. Affiliate disclosure.