On this page (5 sections)
Content reviewed: 2026-10-13. Examples are hypothetical.
Trading a news event requires identifying what information is new, whether it changes the contract's outcome probability and what price remains executable after the release. Being correct about the news is not enough if the order arrives after prices have adjusted.
Prepare the source and timing
Use the original publisher's release calendar. BLS publishes CPI release dates and times, and its calendar can change.[1] Convert the stated time zone carefully and confirm the schedule again before the event.
Create a short record:
| Item | Example of what to write |
|---|---|
| Contract | Exact series, period and threshold |
| Primary source | Official release page |
| Forecast baseline | What result you expected before publication |
| Decision rule | How different results would change your probability |
| Price boundary | Maximum all-in cost you would accept |
| Exposure limit | Maximum loss if the interpretation is wrong |
Read the actual number
A release can contain seasonally adjusted and unadjusted measures, monthly and annual changes, preliminary estimates and revisions. BLS describes why values can be revised.[2] Match the specific number to the rules instead of trading on the first large number in a headline.
In a hypothetical contract asking whether a monthly measure is strictly above 0.3%, a reported 0.3% is not above the threshold. A year-over-year figure of 3.2% on the same page does not answer the question. Save the relevant table or release version for your records.
Reprice before submitting
Compare the new evidence with your prepared cases, then check the available order book. If the offer already exceeds your maximum acceptable cost, the original opportunity may be gone. An old screenshot or aggregator observation is not an executable quote.
Review resting orders before the release. Some may no longer reflect your intended risk. Order instructions determine whether an order rests, fills partially or requires an immediate complete fill; Polymarket documents these controls.[3] None can guarantee a favorable price after unexpected news.
Plan for mistakes and delayed sources
A source outage, correction or delayed publication can make the first interpretation unreliable. Avoid replacing a missing official number with an unverified social post. Check the contract's source and revision rules before concluding that an alternative report settles it.
After the event, compare your forecast, observed release, attempted orders and actual fills. Separate a reasoning error from a slow or expensive execution. Use that record to decide whether the strategy has a repeatable advantage. A profitable surprise does not demonstrate one by itself.
References
- U.S. Bureau of Labor Statistics. Schedule of Releases for the Consumer Price Index. Accessed October 13, 2026.
- U.S. Bureau of Labor Statistics. Revisions. Accessed October 13, 2026.
- Polymarket Documentation. Place Orders. Accessed October 13, 2026.