Stock Market · Options Theory

Why option sellers tend to win (with risk)

If 90% of option buyers lose, someone is consistently winning. That's option sellers. But the 'consistently' part comes with an asterisk, when sellers lose, they can lose catastrophically.

The edge of option selling

1. Time value: every second, theta works for the seller. Premiums decay to zero by expiry. The seller keeps the decay.

2. High probability: OTM options expire worthless most of the time. A 0.2 delta OTM option expires worthless 80% of the time. Sellers are on the right side of that probability.

3. IV premium: IV typically overestimates actual volatility (historical volatility is often lower than implied). Sellers collect a volatility risk premium.

> Option sellers are like insurance companies. They collect small premiums consistently and pay out rarely but potentially large amounts.

The tail risk

Selling naked options has unlimited loss potential. A single black swan event, COVID crash, Adani collapse, sudden geopolitical event, can wipe out months of premium collection in one day.

March 2020: Nifty fell 38% in 5 weeks. VIX hit 84. OTM put sellers faced losses 10–50× their premium collected.

How professional sellers manage risk

• Selling naked leaves the maximum loss undefined; buying a further OTM option against it turns the position into a spread, capping that loss in exchange for part of the premium
• Strict position sizing: never put more than 20–30% of capital at risk in short options
• Stop-loss rules: if premium doubles (2×), close the position
• Delta hedging: continuously adjust underlying position to neutralise delta exposure

Short selling optionsstatistically profitable but with fat-tail risk

Always define maximum lossthe difference between your short and long strike in a spread

Selling options is a viable strategy, but requires discipline, hedging, and respect for tail risk.

Takeaway. Option sellers collect theta and win often, while carrying tail risk that is unbounded on a naked position. A defined-risk spread gives up part of the premium to put a ceiling on the loss, which is the whole trade: how much income you are willing to forgo to know your worst case in advance.