PT - JOURNAL ARTICLE AU - Fischer Black TI - How we came up with the option formula AID - 10.3905/jpm.1989.409198 DP - 1989 Jan 31 TA - The Journal of Portfolio Management PG - 4--8 VI - 15 IP - 2 4099 - https://pm-research.com/content/15/2/4.short 4100 - https://pm-research.com/content/15/2/4.full