Best Stocks for Calendar Spreads: 10 Ranked
Ten names ranked by the steepness of their volatility term structure — the spread between near and far month that a calendar actually monetises.
The Short Answer
A calendar spread sells the front month and buys a later one, so it profits when near-term volatility is cheap relative to longer-dated volatility. That relationship is the term structure, and its slope — contango — is the single measurement that says whether a calendar is worth opening on a given name.
Most calendar screens rank by implied volatility, which is the wrong axis entirely: a calendar is close to volatility-neutral in level and directional in slope. This screen ranks on ORATS contango so the ordering reflects what the trade is actually exposed to.
ApexVol screens 399 optionable names for this list, requiring a $5+ share price and 1,000+ contracts of average daily option volume before ranking. Ranked by ORATS contango, the slope of the volatility term structure between near and far expirations. Requires $5+ share price and 1,000+ contracts average daily option volume so both legs are tradable.
Term structure slopes at 7.0, so front-month volatility is cheap against the back month. 30-day IV 72%, IV rank 73, on 9K contracts a day.
Term structure slopes at 3.7, so front-month volatility is cheap against the back month. 30-day IV 86%, IV rank 40, on 6K contracts a day.
Term structure slopes at 2.9, so front-month volatility is cheap against the back month. 30-day IV 106%, IV rank 48, on 23K contracts a day.
Term structure slopes at 2.1, so front-month volatility is cheap against the back month. 30-day IV 105%, IV rank 48, on 78K contracts a day.
How We Ranked These Strategies
Ranked by ORATS contango, the slope of the volatility term structure between near and far expirations. Requires $5+ share price and 1,000+ contracts average daily option volume so both legs are tradable.
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Frequently Asked Questions
What is contango in options term structure?
Contango means longer-dated implied volatility trades above near-dated. It is the normal state for equity options, and the steeper it is the more a calendar spread collects for selling the front month against the back. Backwardation — the reverse — usually signals an imminent event and is hostile to calendars.
When does a calendar spread lose money?
When the stock moves sharply away from the strike, or when near-term volatility rises relative to longer-dated. Both destroy the structure: the first pushes the position away from its peak profit zone, the second inverts the very relationship the trade was opened to harvest.
Which strike should a calendar use?
At the money, if you want the neutral version. A calendar reaches maximum profit with the stock sitting at the strike at front-month expiration, so placing the strike at the current price maximises that zone. Moving it away turns the trade directional.
Why rank by contango instead of implied volatility?
Because a calendar is roughly neutral to the level of volatility and directly exposed to its slope. Two names at identical 40% implied volatility can have completely different calendar economics if one is in steep contango and the other is flat. Ranking on level would miss that entirely.
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