How does a long strangle differ from a straddle and when is it preferred?

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AcadiFi · Accepted Answer

A long strangle buys an OTM call and an OTM put with different strikes but the same expiration. For Pinewood Airlines at $30, you might buy the $33 call for $0.80 and the $27 put for $0.75, paying $1.55 total instead of the $3+ an ATM straddle would cost. Key differences versus a straddle: - Cheaper premium: lower breakeven requirement in dollar terms. - Wider breakevens: stock must move to $34.55 or $25.45 to break even (±15% vs. straddle's ±10%). - Lower gamma near the current price: less responsive to small moves. - Greater leverage: percentage return on a home-run move is higher because the cost basis is smaller. ```mermaid flowchart TB A[Pinewood at $30] --> B[Buy $33 call
$0.80] A --> C[Buy $27 put
$0.75] B --> D[Breakeven $34.55] C --> E[Breakeven $25.45] ``` On the CFA exam, remember the strangle is preferred when: (1) you expect a very large move, (2) implied volatility is elevated and you want to reduce vega exposure per dollar invested, or (3) you want to free up capital for other trades. It's worse than a straddle when the stock moves only modestly — the straddle at least captures gamma on small moves while the strangle stays near worthless until a threshold is breached.

How does a long strangle differ from a straddle and when is it preferred?

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