A beginner-friendly introduction to option selling — how premium is earned, why time decay helps the seller, and the risk that must always be respected.
Where a buyer pays premium hoping for a big move, a seller collects that premium and hopes the move never comes.
Every option loses value each day as expiry nears — time decay (Theta). For a buyer it is the enemy; for a seller it is income, as long as the option stays out-of-the-money and finally expires worthless.
Selling is not free money. Reward is limited to the premium collected, but risk can be much larger on a sharp move. This risk-reward asymmetry is why position sizing and discipline matter so much.
The best time to sell is usually when IV is high, because inflated premiums are likely to fall. Selling into low volatility gives little premium for the same risk.
Because losses can be large, selling needs margin (SPAN + Exposure) and more capital than buying. Sizing to your account is the first discipline.
The Options Selling course walks through each of these with live examples and a clear risk framework.