The BDV dividend is $.163 x 4 = $.652 per year.

The NAV is $8.34. That gives a dividend yield of 7.8%.

But look at some of the top holdings and the dividend yield of those stocks:
Chevron Corp. 3.8%
AT&T, Inc. 6.8%
ExxonMobil Corp. 2.4%
Wal-Mart 2.2%
Coca-Cola Co. 3.3%

Then consider the 0.83% in management fees.

So where is this fund getting a 7.8% yield? Something does not add up.