data $=$ pd$.$read$\_$csv$(\text{'}$ps$1-$data.csv$\text{'},$ encoding $=$ 'latin$1\text{'},$ error$\_$bad$\_$lines$=$False$)$

data$[\text{'}$Maturity Date'$]=$ pd$.$to$\_$datetime$($data$[\text{'}$Maturity Date'$],$ format$=\text{'}\%$m$/\%$d$/\%$y$\text{'})$

data$[\text{'}$Calendar Date'$]=$ pd$.$to$\_$datetime$($data$[\text{'}$Calendar Date'$],$ format$=\text{'}\%$m$/\%$d$/\%$y$\text{'})$

data $=$ data.drop$($columns $=[\text{'}$Issuance Date', 'First Coupon Payment Date'$])$

data.head$()$