Thanks to Paul Kedrosky for a clear and useful analysis.
Levered ETFs, with the various targeted multipliers, reset their basis at the end of each trading day, which means that you are levered up only for that day.
This can have some remarkable and counter-intuitive results over a trend.
There is also a signficant amount of intraday slippage in volatile markets.
More Fun with Levered ETFs - Paul Kedrosky - Seeking Alph
"Some people see God as they see a cow, and love Him as they love a cow — for the milk and cheese, and the profit it brings. This is how it is with people who love God for the sake of worldly possessions or inward comfort. They do not truly love God when they love Him for their own advantage. The eye through which I see God is the same eye through which God sees me; my eye and God's eye are one eye — one seeing, one knowing, one love.”
Meister Eckhart, Predigten und Traktate