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21 DTE vs. Profit Target: Which Should Manage a Short Put?
Time-based and profit-based rules solve different problems. One controls late-cycle risk; the other controls how much premium you are willing to leave on the table.
What a time-based rule is trying to control
As expiration approaches, gamma can become more important and option outcomes can change faster near the strike. A DTE rule is designed to prevent a position from drifting too deep into that late-cycle risk.
What a profit target is trying to control
A profit target asks whether the remaining premium is worth the risk still being carried. It is primarily a reward-versus-risk decision rather than a calendar rule.
The rules can coexist
A written plan can say to close when either the profit objective is met or the position reaches a time threshold. That creates two independent exit gates.
Do not treat 21 DTE as a law
Twenty-one DTE is a commonly discussed management point, but it is not a universal market law. Different strategies, underlyings and objectives can justify different timing.
Event risk can accelerate management
Earnings, macro events or company-specific news may justify reducing exposure before either the time or profit threshold is reached.
The portfolio comes first
If one position is contributing too much stress or concentration, portfolio risk can override both the DTE and premium-capture rule.
Use a written options process
Define winner management, time exits, loser decisions, assignment capacity and portfolio limits before the trade is under pressure.
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When to Close · 50% vs. 80% · 21 DTE vs. Profit Target · Tested Strike · Roll vs. Assignment · Rolling for Credit · Early Assignment · Expiration Risk · When Not to Roll