Selling Options Premium: Income, Edge and Tail
Learn what it means to sell options premium, why premium exists, theta and volatility exposure, and the tail risks that premium sellers must manage.
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OPTIONS EDUCATION GUIDE
Reg-T vs. Portfolio Margin for Options Traders
Reg-T and portfolio margin are different methods for determining account margin requirements. Neither changes the contractual payoff of the option itself.
Prepared by Farland Capital Education Team · Educational methodology
Reg-T
- Reg-T generally applies more formulaic margin treatment to positions.
- It can require more buying power for some option trades than portfolio margin.
Portfolio margin
- Portfolio margin uses risk-based scenario analysis across eligible positions.
- Well-hedged or diversified exposures can receive lower requirements, while concentrated or stressed exposures can require more.
Why leverage changes behavior
- Lower initial buying-power usage can tempt traders to hold more positions.
- If the portfolio becomes larger simply because margin is more efficient, day-to-day P&L and drawdowns can become much larger.
The key principle
- Margin efficiency should be used to preserve liquidity—not as a reason to maximize leverage.
- Portfolio stress and assignment obligations still matter even when the broker's initial requirement appears small.
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Educational purposes only. This page is not individualized investment advice or a recommendation to use any security or strategy. Options involve risk and are not suitable for all investors.