Figure 5From: Call option price function in Bernstein polynomial basis with no-arbitrage inequality constraints Implied volatility residuals computed as \(\pmb{\sigma _{i} - \hat{\sigma}_{i}}\) , where \(\pmb{\hat{\sigma}_{i}}\) denotes the values of estimated implied volatility. Results are reported for both of the times to maturity of \(\tau= 30~\mbox{days}\) and \(\tau= 80~\mbox{days}\), respectively.Back to article page