Compare the Greek profile of long and short volatility positions that use both a call and a put.
Long volatility
A long straddle may begin near zero delta but has positive gamma, positive vega and negative theta. A sufficiently large move or IV increase can help, while a quiet market erodes premium.
Short volatility
A short straddle generally has negative gamma, negative vega and positive theta. Its initial neutral delta can become strongly directional after a move, and losses can be substantial or unlimited on the call side.
Strangle differences
A strangle uses different OTM strikes and usually costs or collects less premium. It may require a larger move, and each leg's delta changes as the underlying approaches its strike.
A practical example
A long ATM straddle begins near zero delta. After a strong rally, call delta rises and put delta fades, leaving the position positively directional while gamma and vega also change.
This simplified example isolates selected sensitivities so their interaction is easier to understand. Live option prices also reflect the underlying price, time decay, rates, dividends, liquidity and transaction costs. Greeks are theoretical estimates, not guarantees.
Frequently asked questions
Does zero delta mean no price risk?
No. Gamma can create directional exposure quickly after a move.
Why do long straddles lose in quiet markets?
Both options carry negative theta and may also lose from falling IV.
Are short strangles defined risk?
Uncovered short strangles generally carry substantial downside and theoretically unlimited upside risk.
Continue the All Greeks in Action cluster
Explore related guides: Option Greeks for an Iron Condor · Option Greeks Scenario Analysis · What Is Rho in Options?. For a structured sequence, use the free Level 8 – All Greeks in Action course.
Advanced strategy: Read the Backspread guide and take the free Level 14 course.
Options involve risk and are not suitable for every investor. This material is educational and is not investment, tax or legal advice. Greeks are theoretical estimates, and contract terms and broker requirements can vary.
Neutral premium strategy: Read the Short Straddle guide and take the free Level 15 course.