Weekly options
Weekly options expire every Thursday (recently aligned by SEBI to specific index weeks). They are shorter-dated, cheaper per contract, and more sensitive to theta (time decay) and gamma (rate of change of delta).
Monthly options
Monthly options expire on the last Thursday of the month. They are longer-dated, more expensive, and behave more like their underlying — less whipsawy, but with slower P&L movement.
SEBI 2025 reform
In 2024–25, SEBI restricted weekly expiries to one benchmark index per exchange to reduce retail speculation. This reduced turnover but also reduced the explosive weekly-options P&L swings that hurt retail. Strategies built around weekly expiries had to adapt.
When to use which
Weekly options suit short-horizon directional trades and premium-selling strategies. Monthly options suit longer-horizon directional bets and structured positions. Sleeping Trade uses both based on regime — you don't pick; the engine does.
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