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WFN QUICK BRIEF · UNDER 1 MIN
The short version
MODE 2 OF 2
What the primary record establishes
The Kalshi endpoint returns event and series identifiers, a scheduled time and override fields for fee type and multiplier. Null in both override fields indicates that the event override has been cleared. The event then falls back to its parent series. Kalshi · Get Event Fee Changes ↗
What the distinction changes
Historical reconciliation uses the fee structure in effect when the trade occurred. A cleared override still belongs in earlier trade records. Store effective times in a common time zone and retain the applicable series record for each interval.
What to check before drawing a conclusion
Test an execution before the change, during the override and after the return to series fees. Compare the calculated figure with the actual execution fee and keep the identifier of the applicable change.
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01 · VERIFIED RECORD
What the primary record establishes
The Kalshi endpoint returns event and series identifiers, a scheduled time and override fields for fee type and multiplier. Null in both override fields indicates that the event override has been cleared. The event then falls back to its parent series. Kalshi · Get Event Fee Changes ↗
02 · WFN EDITORIAL ANALYSIS
What the distinction changes
Historical reconciliation uses the fee structure in effect when the trade occurred. A cleared override still belongs in earlier trade records. Store effective times in a common time zone and retain the applicable series record for each interval.
03 · REVIEW POINTS
What to check before drawing a conclusion
Test an execution before the change, during the override and after the return to series fees. Compare the calculated figure with the actual execution fee and keep the identifier of the applicable change.
Original WFN vector illustrationWFN · 8 November 2026
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Editorial notePrimary sources and WFN analysis are identified in the article. Cover illustration by WFN.
WFN REALITY LEDGER
What is on the record?
Primary-source explainer
Primary-source explainer
Primary record / reference periodKalshi · Get Event Fee Changes
