ApexVol Terminal
Options analytics, live.
Chains, IV rank, expected move and dealer positioning for 5,500+ US stocks and ETFs.
Free on AAPL, no account. Trial: no charge if you cancel before it ends.
On this page
What is Back Month?
Back Month The longer-dated expiration in a multi-expiration options strategy. In a calendar spread, the back month is the option you buy (longer-dated), which retains more value as the front month decays. Back-month options have higher vega, making them more sensitive to implied volatility changes.
Complete definition
The longer-dated expiration in a multi-expiration options strategy. In a calendar spread, the back month is the option you buy (longer-dated), which retains more value as the front month decays. Back-month options have higher vega, making them more sensitive to implied volatility changes.
Related terms
ApexVol Terminal
Options analytics, live.
Chains, IV rank, expected move and dealer positioning for 5,500+ US stocks and ETFs.
- Live chains and Greeks
- IV rank and percentile
- Expected move and GEX
- Screener and strategy P&L
Free on AAPL, no account. Trial: no charge if you cancel before it ends.
Try this with real market data. 5,500+ stocks, live options chains, IV analytics and P&L. 7-day free trial.
Keep reading
Where this term
actually shows up.
Know the term.
Now see it priced.
Every definition here is something the Terminal shows you live on a real chain — the Greeks, the surface, the flow. Run it on AAPL without an account.
Real market data, not a sandbox. See it live on AAPL.