It’s a strategy you may be interested in, too. But it’s important to understand the pros and cons.Bloomberg reports that these aggressive ETFs boasting yields upward of 8% have quadrupled in size in just three years to about $160 billion.But while investing in dividend-paying stocks or dividend ETFs (exchange-traded funds) is a fairly tried and true strategy, now, investors are taking that concept to a new level with a another type of ETF “offering eye-popping yields generated by complex derivatives.”Chasin ...