To The Moon

After selling a few Puts, you may start running into the same dilemma.

At first, you may be worried about getting assigned, so you choose a strike price further away from the current share price. After doing this a few times, however, you may start thinking: “I’ve set aside so much capital, but I’m only collecting this amount of premium each month. Is it too little?”

So you move the strike price closer.

The premium goes up, but another concern appears: “What if the share price really drops?”

This is exactly what advanced Short Put management is about: how much additional risk are you taking on for the extra premium you collect?

For the same stock, where should you set the strike price? When IV is high, is it worth opening a position? If you have already earned most of the premium, should you continue holding the position?

Below, we will go through the process of selecting contracts, sizing positions and managing open trades, and look at how each decision affects your return, effective purchase price and capital allocation.

This article mainly discusses Cash-Secured Puts, where sufficient cash has been set aside to take assignment. All examples assume one option contract represents 100 shares. All figures are for educational purposes only and do not represent live market prices. Transaction costs, taxes and financing costs are not included.

1｜First, understand how much downside buffer your premium provides

Assume the underlying share price is US$100. You sell one Put with a strike price of US$100 and receive a premium of US$4 per share, or US$400 per contract.

If you hold the option to expiry, the outcomes are:

The figures above include the premium received and the profit or loss based on the share price at expiry after assignment.

A Short Put does not require the underlying share price to rise significantly for the trade to be profitable. However, the potential return is capped, while the downside protection provided by the premium is limited.

In this example, the breakeven price at expiry is US$96. If the share price falls to US$80, the US$400 premium received is not enough to offset the loss after taking assignment.

There is another important distinction that is easy to overlook: the breakeven price at expiry is not the same as the breakeven level for closing the position before expiry.

Before expiry, the Put price is still affected by remaining time value and IV. Even if the share price is above US$96, you may still incur a loss when buying back the option to close the position.

Therefore, when assessing a Short Put trade, you should consider both the effective purchase price after assignment and the price fluctuations that may occur while the position remains open.

2｜Choosing the strike price: is an extra US$100 of premium worth a higher assignment price?

Assume the underlying share price is US$100 and you are comparing three Put options expiring in around 30 days:

The Delta shown in the table refers to the Put option contract itself, not the position Delta after selling the Put.

Looking only at the premium, the 95 Put appears the most attractive. But if US$90 was originally the price at which you were willing to buy the shares, switching from the 90 Put to the 95 Put means:

• You collect an additional US$100 premium per contract;

• The amount payable upon assignment increases by US$500;

• After accounting for the premium, your effective purchase price rises from US$89 to US$93 per share.

Now take the scenario one step further. If the share price falls to US$85 at expiry, how would the two contracts compare?

This makes the trade-off clearer: while you collect an additional US$100 premium, you are also accepting a higher effective purchase price.

Your turn: if you were originally only willing to take assignment at US$90, what would justify switching to the 95 Put?

It could be because you reassessed the stock and concluded that the higher purchase price was still reasonable. But that decision should be based on your own investment view, rather than simply chasing a higher premium.

A clearer decision process is: first decide the price at which you are genuinely willing to take assignment, then assess whether the premium is attractive enough. If the return is not compelling, choosing not to open the trade is also an option.

3｜Looking at Delta: do not just focus on the opening value — watch how it changes

In the example above, the 90 Put has a Delta of −0.18.

Some investors use the absolute value of Delta as a rough reference for the likelihood that an option may expire in the money. However, Delta primarily measures how sensitive the option price is to changes in the underlying share price. It should not be treated as an exact probability of assignment or a trade win rate.

In the Tiger Trade options chain, you can select the same expiry date and compare Put options across different strike prices side by side.

Image: The strike price is shown in the centre, while the Put Delta, Gamma and Theta are displayed on the right. The screenshot uses 15-minute delayed quotes and is for interface and illustration purposes only.

Using AAPL contracts as an example, the screenshot shows the Sep 28W (7D) expiry. For the Put side, the 330 Put has a Delta of −0.293, the 332.5 Put has a Delta of −0.359, and the 335 Put has a Delta of −0.448. Further down the chain, the 337.5 Put has a Delta of −0.532, while the 340 Put has a Delta of −0.615.

Within this group of contracts, as the strike price moves closer to or above the current share price, the absolute value of Delta becomes larger. This means the option price becomes more sensitive to movements in the underlying stock. So when choosing a strike closer to the current share price, you should not only compare how much more premium you can collect, but also how much more directional sensitivity you are taking on.

Gamma can help you observe how quickly Delta may change as the underlying stock moves. In this example, the Put Gamma values around these strikes are mostly in the 0.028 to 0.034 range, showing that Delta may continue to adjust as AAPL moves. Theta, on the other hand, shows the effect of time decay. For instance, the 330 Put has a Theta of −0.253, the 335 Put has a Theta of −0.283, and the 340 Put has a Theta of −0.260. This means that, all else equal, time decay may gradually work in favour of the option seller — but only if the stock price and implied volatility do not move against the position.

However, “expiring in the money” and “making a loss on the trade” are not the same thing.

Going back to the earlier example, suppose the 90 Put collects US$1 per share in premium and the share price is US$89.50 at expiry. Although the Put is in the money, after accounting for the premium, the trade still has a profit of US$0.50 per share before transaction costs.

Another advanced point is that Delta changes over time.

If the share price falls quickly from US$100 towards US$90, the Put Delta may become more negative and its absolute value may increase. For a Put seller, this means the position becomes increasingly sensitive to further declines in the share price. That is why, when managing a Short Put, you should not look at Delta only at the point of entry. You should also monitor how it changes as the stock moves, as time passes, and as market conditions shift.

The Delta shown in the options chain refers to the option contract itself. After selling a Put, the position Delta has the opposite sign.

So choosing a contract with a lower absolute Delta at entry does not mean the position no longer needs to be managed. When comparing and managing contracts, Delta should be considered together with the assignment price, remaining time to expiry, IV and position size.

Your turn: if the share price has not yet reached your strike price, but the Put Delta has already increased significantly in absolute value, what aspects of the position would you reassess before deciding whether to continue holding?

4｜Looking at IV and expiry: what risk are you taking for the extra premium?

When Put premiums rise, it can be tempting to view it as a better opportunity to sell.

But before comparing returns, first ask: why has the premium increased?

All else being equal, a rise in IV, or implied volatility, generally increases the price of a Put option. A seller preparing to open a position may therefore collect a higher premium. However, for an existing Put seller, the cost of buying back the option to close the position may also increase.

Whether high IV is worth participating in therefore depends on what is driving it. Is overall market volatility increasing? Is the company about to report earnings? Or has there been news that could materially affect the business outlook?

First, check where IV sits relative to its own history

In Tiger Trade, go to the stock page and select Options → Options Analysis → Volatility Analysis to view IV and IV Percentile, which can help you understand where the current volatility level sits relative to its own historical range.

Image: A 52-week comparison period is selected. The blue line represents implied volatility, the orange line represents historical volatility, and the grey line represents the share price. The figures are for illustration purposes only.

In the example above, IV is 25.02%, while IV Percentile is 24.30%.

The former represents the annualised volatility implied by option prices. The latter indicates that the current IV is relatively low compared with the selected historical period. Therefore, simply seeing that “IV is above 25%” is not enough to conclude that the options are expensive.

Likewise, a high IV Percentile does not automatically mean the option is overpriced. The market may be pricing in earnings, major announcements or other uncertainty.

If the underlying share price has fallen to a level at which you were already willing to buy, and your investment thesis remains intact, you may then compare the available contracts. But if you have not yet understood why the share price has fallen, it may not make sense to rush into a trade simply because the premium has increased.

Then consider which events are covered by the contract

Choosing an expiry date also means choosing the period of risk you are willing to take on.

Your turn: suppose you are comparing two 90 Puts. One expires before the earnings announcement, while the other expires after. The latter offers a higher premium. How would you compare them?

The higher premium may reflect both the longer time to expiry and the uncertainty surrounding the earnings announcement. So apart from the additional premium, consider:

• Are you willing to take on the risk of a post-earnings gap?

• If the share price falls directly below the strike price, would you still be willing to take assignment?

• How long will the capital need to remain reserved, and could that affect your other positions?

Only by considering these factors together can you assess whether the additional premium is worth the extra risk.

Use GEX as an additional way to assess the volatility environment

Besides IV, you can also go to Options → GEX Analysis on the stock page to observe market Gamma exposure and use it as an additional reference for how hedging activity may affect price volatility.

Positive Gamma illustration: under the model assumptions shown, hedging activity may help dampen price volatility.

Negative Gamma illustration: hedging activity may amplify price volatility. Both charts are for educational illustration only and do not represent the real-time market condition of AAPL shown above.

For Short Put investors, GEX can provide another angle from which to reassess the position: if volatility may increase, is the downside buffer provided by your strike price still sufficient, and is the number of contracts sold still appropriate?

However, GEX is a model-based estimate of market exposure and depends on positioning assumptions. It changes with market conditions and cannot predict price movements with certainty. Even in a positive Gamma environment, the share price may still move sharply because of earnings or unexpected news.

It can therefore be useful to cross-check GEX with IV, upcoming events and the current share price. Any key levels shown in the chart should be treated as areas to monitor, rather than guaranteed support levels.

Ultimately, the decision to open a position should still come back to the price at which you are willing to take assignment and whether the overall position size is manageable.

5｜Position sizing: assume every Put gets assigned before deciding how many contracts to sell

Suppose you choose the 90 Put. Each contract would require US$9,000 to take assignment.

One contract may be manageable. Five contracts would require:

US$90 × 100 shares × 5 contracts = US$45,000

At this point, the key consideration is no longer just the Delta of each contract, but the effect of assignment on your overall portfolio:

• What percentage of your portfolio would US$45,000 represent?

• Do you already own the same stock?

• If the shares continue to fall after assignment, how much additional loss can you tolerate?

If you sell Puts on several stocks at the same time, you should also add up the potential assignment amounts across all positions. This is particularly important when the underlying stocks are concentrated in the same sector, as a market decline could put several positions under pressure at the same time.

Having enough cash to take assignment only addresses your ability to pay for the shares. Concentration risk and further downside after assignment still need to be assessed separately.

American-style equity options may also be assigned before expiry, so your capital planning should not be based on the expiry date alone.

6｜Managing profits: is the final US$30 still worth waiting for?

Using the same 90 Put with around 30 days to expiry, assume you collected US$100 when opening the trade.

Ten days later, buying back the entire contract would cost only US$30. If you close the position now, you would realise approximately US$70 in profit. If you continue holding it, the maximum remaining profit over the next 20 days is around US$30.

Your turn: if there is only US$30 left to earn, but one contract has 3 days left to expiry while another has 20 days, what different factors would you consider?

Apart from the number of days remaining, you should also consider whether there are any major events during that period, how far the share price is from the strike price, and whether keeping the capital tied up is worthwhile.

Time decay generally benefits option sellers, all else being equal. However, a decline in the underlying share price or an increase in IV can still cause part of the unrealised profit to be given back.

A profit-taking percentage can therefore form part of your position management rules, but each decision should also consider: how much profit remains, how much longer you need to wait, and what risks you need to take to earn it.

If you decide to close the position early, you should also look at the actual bid-ask spread and executable price. Trading volume and open interest, or OI, may help indicate how active a contract is, but the actual cost of closing the position will still depend on prevailing market liquidity.

7｜Managing losses: close, roll, or take assignment?

Assume the underlying share price falls from US$100 to US$95, while you are holding a 90 Put.

The fact that the share price has not yet reached the strike price does not mean you must act immediately, but it also does not mean the position can be ignored.

At this stage, you can reassess:

• Does the original reason you were willing to buy the stock still hold?

• Have the remaining time to expiry or upcoming events changed the risk?

• If you had no position today, would you still be willing to open this trade?

Different answers may lead to different actions.

After assignment, the share price may continue to fall. Therefore, saying “I am willing to take assignment” should also mean that you have considered the purchase price, position size and potential downside after assignment.

As for rolling, it essentially means buying back the existing option and selling a new option. The profit or loss on the existing contract is realised when it is closed, while the new contract creates a new obligation.

For example, suppose you initially collected US$100 in premium, but it now costs US$300 to buy back the option. The existing contract therefore realises a US$200 loss.

If you then sell a new Put and collect US$350, the roll produces a net cash credit of US$50. However, the new contract is still open, so the US$50 should not be treated as the overall profit from the entire trade.

Before every roll, it is worth asking:

If I had no position today, would I still be willing to sell this new Put?

Then compare the new strike price, expiry date, capital requirement and event risk before deciding whether rolling still fits your current view.

Before Your Next Sell Put Trade, Answer These 5 Questions

1. Underlying: If I am assigned, am I still willing to own this stock?

2. Price: Does this strike price match the price at which I genuinely want to buy, or am I moving it closer simply because the premium is higher?

3. Time: What major events does the contract cover, and is the return worth taking that risk for this period?

4. Position size: If all my Puts are assigned at the same time, will the capital requirement and overall portfolio exposure still be manageable?

5. Management: What changes would make me reassess the trade, take profit, cut losses, roll, or accept assignment?

Advancing your Short Put strategy means understanding the trade-off behind every decision: how much extra premium you collect, how much your effective purchase price increases, how much capital is tied up, and how long you are taking on the risk.

Which Stock Are You Considering for a Short Put?

👇 Share in the comments: stock ticker + the price at which you are willing to take assignment + what you are most unsure about.

“I’m looking at . I’m willing to take assignment at US$ per share, but I’m still unsure about ______.”

You may be deciding whether to choose a strike closer to or further from the current share price, whether to open the trade now or wait until after earnings, or whether the position would become too large after assignment.

If you already have a specific contract in mind, you can also include the expiry date, strike price and premium, so everyone can discuss the trade-offs together. If you have not selected a contract yet, simply share the stock you are watching.

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For the same stock, at what price would you be willing to take assignment? Feel free to reply to other users, share your thinking, and like the comments you find useful.

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