Expiry Week Mechanics: Why Tuesday Is Not Like Friday

Nifty weekly options expire on Tuesday. The day before and the morning of expiry do not behave like the rest of the week, because time decay speeds up and the contest around Max Pain is settled in a few hours. Version 2 (October 8, 2026): the description of how the closing value is formed was corrected, and sources were added. AION Analytics research note. Canonical version: https://aionanalytics.in/research/notes/expiry-week-mechanics

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-10-08
DOI
https://doi.org/10.5281/zenodo.23226826
Primary Topic
Financial Markets and Investment Strategies
Type
article
Field-Weighted Citation Impact
0.00
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article

Expiry Week Mechanics: Why Tuesday Is Not Like Friday

Lokesh Gupta
Zenodo (CERN European Organization for Nuclear Research)
Financial Markets and Investment Strategies
article

Expiry Week Mechanics: Why Tuesday Is Not Like Friday

Lokesh Gupta
article en

Abstract

Nifty weekly options expire on Tuesday. The day before and the morning of expiry do not behave like the rest of the week, because time decay speeds up and the contest around Max Pain is settled in a few hours. Version 2 (October 8, 2026): the description of how the closing value is formed was corrected, and sources were added. AION Analytics research note. Canonical version: https://aionanalytics.in/research/notes/expiry-week-mechanics

Zenodo (CERN European Organization for Nuclear Research)
Openalex Percentile: Top 8%
Financial Markets and Investment Strategies
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Expiry Week Mechanics: Why Tuesday Is Not Like Friday — Lokesh Gupta · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS