I haven't looked but what you are describing sounds like a leveraged fund.
Just remember leverage is what got all the banks and investment companies in trouble. It is nice when the market goes up but really hurts when the market is going down (hence the 20% yield)
You don't need to maximize your returns. You just need reasonable consistent returns. There are plenty of ETF utility funds that are NOT leveraged. They will have reasonable more sustainable yields.
Leverage is a double edged sword.
Just my thoughts
Not always Toofuzzy
Take the road less traveled. It will make all the difference.