A good trade is mostly decided before you click sell (Lesson 4). But two things still need a plan: when to open, and what to do once the position is live. Decide both before you enter — not while you're staring at a red number.
Get the timing right
Higher implied volatility — the market's estimate of how much the stock is likely to swing — means fatter premiums, because a bigger expected move makes the option worth more. The IV Rank calculator tells you whether today's IV is rich or cheap versus its own past year — selling is more attractive when IV Rank is elevated. But always ask why it's high. "The whole market pulled back" is a reason to sell. "Earnings are Thursday and I don't know what will happen" is a reason to wait.
The earnings trap
Selling a Put across an event you didn't mean to hold through. Premiums balloon before earnings because the stock can gap — leap sharply up or down the instant the market reopens — and a Cash-Secured Put gives you no stop and no exit while the market is closed. The rich premium is the market paying you for real gap risk. Check the earnings date before every trade; the expected move calculator shows how big a swing is priced in.
Take profits early
Many Sellers close a winner around 50% of max profit — buying the Put back once it has lost half its value — rather than squeezing the last few dollars while leaving the obligation open. It's a convention, not a law, but it trades a little upside for meaningfully less tail risk (the rare, outsized loss): late in the trade you're risking the whole position to earn the last bit of premium.
Have an assignment plan
Before selling, know what you'll do if the stock finishes through your strike: hold the shares, start selling Covered Calls against them (that's the Wheel, the next lesson), or close the position. Decide it cold, not in the moment — assignment is a planned outcome, not an emergency.
Rolling, honestly
Rolling means buying back the current Put and selling another, usually further out in time and often lower in strike. Done for a credit — collecting more for the new Put than it costs to buy back the old one — when you still want the stock, it buys time and lowers your cost basis. Done purely to avoid booking a loss, it just makes a bad position bigger. The rolling decision calculator shows whether a given roll is actually a net credit and where it moves your breakeven.
Common mistakes
- Selling on a stock you don't actually want — the original sin.
- Sorting the chain by premium and selling the top line.
- Selling across earnings without meaning to.
- Sizing for the premium instead of the assignment.
- Treating a high win rate as low risk — small wins, rare large losses.
- Rolling over and over to avoid admitting the thesis broke.
For a deeper look at FOMO, revenge trading, panic-closing, and the other psychological traps that erode options income over time, see the trading psychology guide.
Key takeaways
- Sell into elevated IV you can explain; never sell across an event by accident.
- Take profits early (around 50%) rather than risk a lot to keep a little.
- Decide your assignment plan before you enter — hold, Wheel, or close.
- Roll only when you still want the stock and the roll genuinely pays you.