The Royal Mail (LON: RMG) share price is up 10% since releasing encouraging H1 2021/22 results on 18 November. Since then, it's also announced it will be returning £400 million to investors. £200 million will be paid out as special dividends, with the other £200 million spent on share buybacks. And at 504p right now, Royal Mail shares are up 21% in the past month, and 70% since this time last year. But they're still 127p off their five-year high of 631p that they hit on 11 May 2018.