Samuel Wong's Playbook: Why Smart Investors Sell Puts (Not Just Buy Them)

Speaker: Samuel Wong, Investment Representative at Tiger Brokers, as he breaks down options fundamentals for first-timers and walks through why selling puts — not just buying calls — is one of the most underrated tools in a retail investor's kit.

[About the Speaker]
Samuel Wong is a trader with over 5 years of experience across market segments including precious metals and cryptocurrency, and 2 years of technical experience in financial derivatives ranging from US options and futures to SGX-listed DLCs. He also serves as an in-house trainer and speaker for Tiger Brokers, and as an Investment Representative for Tiger Brokers Singapore, supporting both new and like-minded investors through their journey with care and guidance.

[The Hook] "Most people think options are for gambling. You can make a lot of money, or lose everything you put in." Samuel opened with the line everyone expects to hear about options — then spent the next hour dismantling it. Options aren't just speculation vehicles; they're used by risk managers and patient investors alike. His focus for the session: the sell put strategy, and specifically the cash-secured put.

[What Actually Is an Option?]

An option is a financial contract, not a stock — it has to be based on an underlying company. One option typically represents 100 shares, and unlike stocks, options carry an expiration date. Expire out of the money, and the option can be a full loss.

A put option gives the holder the right (not obligation) to sell 100 shares at an agreed strike price, any time before expiry. Two reasons people buy puts:

  • Hedging — portfolio managers protecting existing holdings from downside

  • Directional speculation — betting a stock falls in price

[The Flip Side: Why Sell a Put?]

This is where Samuel's talk really started. When you write and sell a put instead of buying one, you collect a premium upfront from the buyer — but take on the obligation to buy shares at the strike price if the buyer decides to exercise. Unlike the buyer, the seller doesn't get a choice once assigned.

Two reasons investors sell puts:

  • Bullish or neutral income play — profit from a stock without owning it, just by collecting premium

  • Discounted entry — get paid while waiting to buy shares at a price you already wanted

Samuel illustrated this with a two-sided story: a portfolio manager buys a put to hedge shares he doesn't want to sell but fears a near-term drop. On the other side, an investor who thinks a stock is too expensive right now sells a put at a lower strike — collecting income while waiting for a discount. "It's not a zero-sum game. In the end of the day, they're actually two [tools] used by both investors and portfolio managers to manage risk."

If the stock stays flat or rises, the put seller keeps the full premium. If it falls enough to get assigned, the premium collected lowers the effective cost basis of the shares bought.

[The Greeks and Moneyness, Simplified]

Option prices move on the underlying share price plus the Greeks:

  • Delta — price sensitivity, and a rough proxy for probability of expiring in the money

  • Gamma — the rate of change of delta (more relevant to active traders)

  • Vega — how implied volatility affects price

  • Theta — time decay, "important for [option] sellers because [theta] indicates how fast the price will decay... near its end of lifespan"

And every option sits in one of three "moneyness" zones:

  • In the money (ITM) — holds intrinsic value, behaves more like equity

  • At the money (ATM) — highest volume and most uncertainty, priciest relative to strike proximity

  • Out of the money (OTM) — cheapest, but decays fast if it stays OTM

"For option sellers, especially for the sell-put strategy, you actually want to look at out-of-the-money options" — collect premium without accepting an unfavorable assignment price.

[Three Flavors of Selling Puts]

Samuel named three approaches, focusing the session on the first:

  1. Cash-secured put — set aside enough cash to buy 100 shares if assigned. "Assignment isn't really a bad thing for investors because it allows them to buy the shares at the entry that they're looking at."

  2. Naked put (on margin) — more for traders chasing income without full cash backing

  3. Put vertical spread — a more advanced, defined-risk structure covered in a separate seminar

[Key Takeaways]

  • Selling isn't the same risk as buying. The put seller trades unlimited-ish downside exposure for upfront income — know which side of the trade you're on.

  • Moneyness drives strategy. OTM strikes are the sweet spot for most put sellers who want premium without inviting assignment.

  • Theta is your friend when you're short. Time decay works in the seller's favor.

[Call to Action 🎯]

  1. Pull up the options chain on a stock you already want to own, and find its current delta at a few strikes below market.

  2. Write down: would you be happy owning this stock at that strike price? If not, it's not a candidate for a cash-secured put.

  3. Drop a comment: what's one stock you'd genuinely be happy to buy at a 10–15% discount to today's price?

Markets are always moving - and sometimes, the best move is knowing what works for you.

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Disclaimer: Investing carries risk. This is not financial advice. The above content should not be regarded as an offer, recommendation, or solicitation on acquiring or disposing of any financial products, any associated discussions, comments, or posts by author or other users should not be considered as such either. It is solely for general information purpose only, which does not consider your own investment objectives, financial situations or needs. TTM assumes no responsibility or warranty for the accuracy and completeness of the information, investors should do their own research and may seek professional advice before investing.

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  • He Man
    ·21:23
    i have been selling puts for 3 yrs now. collect premium and wait for the decay time working in my favour. worst case, roll for a longer timeline with credit premium.
    there was a time, got assign a share. sell call to collect 'rental'.
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  • Jerry Lam
    ·19:30
    我觉得现金担保卖 Put 最容易被低估的地方,不是“收权利金”,而是它可以把“我想等更低价格买股票”变成一套有纪律的执行方式。

    我自己的判断标准会先倒过来问:

    如果明天真的被指派,我愿不愿意按这个执行价买 100 股,而且跌下去以后还能安心持有?

    如果答案不是明确的“愿意”,那即使权利金再高,我也不会把它当成好的 Cash-Secured Put。

    我还会同时看三个东西:

    执行价是否真的是我认可的买入价、到期时间是否合理、隐含波动率是否值得承担这份义务。

    另外有一点我觉得特别重要:卖 Put 的风险不是无限的,但绝对也不是“稳赚权利金”。最坏情况下股票跌到接近 0,损失大致就是:

    执行价 × 100 − 收到的权利金。

    所以真正危险的不是被指派,而是:

    为了高权利金,去卖一只自己根本不想长期持有的股票。

    我会把现金担保 Put 理解成:

    限价买单 + 收取等待费 + 承担接货义务。

    一句话:

    好股票、好价格、足够现金,这三个条件缺一个,卖 Put 就很容易从“等折扣”变成“接飞刀”。

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  • 吉3186
    ·19:16
    The main lesson is simple: options are not only for gambling.
    A cash-secured put can be useful if you already want to buy a stock at a lower price.
    You sell a put and collect a premium.
    If the stock stays above the strike price, you keep the premium.
    If the stock falls below the strike, you may have to buy 100 shares at the strike price.
    The premium received effectively reduces your buying cost.
    OTM puts are commonly used because they provide income while setting a lower entry price.
    Theta helps option sellers because options lose time value as expiry approaches.
    Most important rule: Only sell a cash-secured put on a stock you are genuinely happy to own at that strike price.
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