Option Premium & Theta Decay — Explained in Plain Language
7/6/2026
An option's price = intrinsic value + time value. Time value melts every day — that melting is theta.
In plain words
An option is an ice cream on a hot day: even if nothing else changes, it melts. Near expiry it melts fastest.
Level by level
Beginner
Every day that passes, an option loses a little value — even if the stock doesn't move. That's why 'waiting' costs buyers money.
Intermediate
Theta decay is non-linear: slow far from expiry, brutal in the final 1-2 weeks. ATM options carry the most time value to lose.
Advanced
Sellers harvest theta (positive theta) but carry gamma risk; buyers need the move to happen BEFORE decay eats the premium.
Key takeaways
- Time value → 0 at expiry; only intrinsic remains.
- Decay accelerates near expiry.
- Try the Theta calculator in Tools to see it in numbers.
Memory tip: Options are melting ice cream — buyers race the sun. ☀️🍦
Keep going
_Educational content only — not financial advice. Historical behaviour never guarantees future results._
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