We all know if you back out of the B.S. option pricing model you can solve for what the option is "implying" about the underlyings volatility.

Is there a simple, closed form, formula deriving Implied Volatility (IV) (can anyone direct me to the equation)?

Or is it only solved numerically?

We all know if you back out of the Black Scholes option pricing model you can derive what the option is "implying" about the underlyings future expected volatility.

Is there a simple, closed form, formula deriving Implied Volatility (IV)? If so can you could you direct me to the equation?

Or is IV only numerically solved?

We all know if you back out of the BS option pricing model you can derive and solve what the options is "implying" as its volatility.

However, what is the formula used to derive Implied Volatility (IV) (can anyone direct me to the equation)?

Is there a closed form equation?

Or is it solved numerically?

We all know if you back out of the B.S. option pricing model you can solve for what the option is "implying" about the underlyings volatility.

Is there a simple, closed form, formula deriving Implied Volatility (IV) (can anyone direct me to the equation)?

Or is it only solved numerically?