Explain new methodology of standard market practice

Question

Explain new methodology of standard market practice.

Answer 1

The newly methodology, that quickly became standard market practice, was to find the volatility as a function of underlying and time which when put into the Black–Scholes equation and solved, generally numerically, gave resulting option prices that matched market prices. It is identified as an inverse problem: use the ‘answer’ to get the coefficients into the governing equation.