Royalty Pharma skyrockets 65% in its trading debut as investors flock to the largest US IPO of the year

· *Royalty Pharma surged as much as 65% in its first day of trading Tuesday. *
· *The $2.18 billion initial public offering is the largest US IPO of the year, slightly exceeding Warner Music Group's recent $1.9 billion offering. *
· *It's also the second-largest pharmaceutical IPO ever, coming in just below Zoetis Inc's...