SPX · Box Spreads · Archive

Expired Expirations

Historical record of SPX box spread expirations tracked by this tool, with the last observed implied rate before expiry. Historical rate charts will be backfilled as the dataset grows.


Archive

June 2026

Jun 30, 2026 (quarterly)last implied ≈ 4.29%
Jun 18, 2026 (monthly)last implied ≈ 4.31%

May 2026

May 15, 2026 (monthly)last implied ≈ 4.27%

April 2026

Apr 17, 2026 (monthly)last implied ≈ 4.24%

Rates shown are the last cached implied annualized rate (widest tracked strike width) before each expiration rolled off. This archive starts when the data pipeline goes live — entries above are placeholders until then.