Mr Kuo's article takes a look at the Tesco bond and concludes "you'd be better off buying equity". Perhaps... certainly that has been the default option for investors twenty or thirty years.
Only problem is, the "just buy equity" strategy hasn't been working very well for over a decade. Even Tesco shares (which are not too bad on the scale of things) are down over 30% over the past five years. Compared to that, compounding the 5% coupon on the bond over a few years looks rather good, with rather less uncertainty.
