I'm new to ETFs and such and am trying to learn as much as possible quickly. I came across this fund today that seems like magic to me: DGS.PR.A (TSE) The fund seems to maintain a $10 value (except for 2008) and pays out just over 5% via quarterly dividends. Can someone explain the "magic" behind the curtain? How is this static nature maintained when the assets in the fund go up and down?
Here's the funds information: http://www.bromptongroup.com/index.php/funds/fund/dgs/overview (looking at the preferred shares one)