Weekly expiry compresses Theta and amplifies Gamma; monthly is smoother. A model tuned for monthly fails weekly without tighter DTE and VIX gates. The framework uses DTE as a feature and tightens filters under 2 days.
Trade the expiry your data covers. Mixing them leaks regime. Weekly needs more discipline; monthly more patience. Size accordingly.
Q: Which is harder?
A: Weekly — compresses Theta, amplifies Gamma.
Q: Same model?
A: No — weekly needs tighter DTE/VIX gates.
Q: Size difference?
A: Weekly smaller, more discipline; monthly patience.
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By Shakti Tiwari · Options AI research pillar. NISM XII certified. Educational only, not investment advice; verify before acting.