Because SSNO are now perceived as "shares at a slight discount" and you can invest the difference (1.3c or what ever it is) elsewhere in the market without tapping additional credit.
cheers
SSN Price at posting:
7.1¢ Sentiment: Buy Disclosure: Held
A personalised tool to help users track selected stocks. Delivering real-time notifications on price updates, announcements, and performance stats on each to help make informed investment decisions.
