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" . . . the formula’s publication in 1973. Within several years, the formula came standard on the calculators held by every options trader."

What calculators would that be in the late Seventies?

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And by the 90s, I don't remember traders ever picking up a calculator, or even seeing one around the office with finance-specific stuff. I was at a small, tech-focused firm, so maybe it was different elsewhere, but I was surprised to read this.

I dunno the model but my dad had one.

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