Stock price when the opinion was issued
Leverage allows them to provide such a large dividend. Typically 2:1 leverage, so you get double the bang for the buck. Lots of volatility, big ups and big downs. When markets are working, work great. Up to the board of the fund as to what distribution they pay out.
Over 20 years, you'd have done better just holding a basket of US or Canadian banks, such as XLF or ZEB.
There is a capital portion and an income portion. You have to careful with a split share corp so check with your financial advisor, The capital share part can be extremely volatile.