Number of convertible bond issues and number and percentage of issuers with listed options. The sample covers US convertible bond issues with available bond and firm characteristics from various sources, which are issued during 2000–14. The bars (left scale) show the total number of convertible bond issues (lighter bars) and the number of issues made by issuers with listed options written on the offering firms’ stocks (darker bars) in each year, and the line shows the percentage of issuers with listed options (right scale) in each year.