Board of Governors of the Federal Reserve System (U.S.), 1935-. "Board seeks public comment on proposed amendment to Regulation T that would change the initial margin requirements for writing of options on equity securities" in Press Releases of the Board of Governors of the Federal Reserve System
(February 6, 1985).
https://fraser.stlouisfed.org/title/9237/item/696531, accessed on May 10, 2026.