And so I did.
Comparison between UPRO / TMF versus your leveraged proposition during the past ten years:
https://www.portfoliovisualizer.com/bac ... on5_2=-200
Ignoring UPRO / TMF to obtain a logner time period:
https://www.portfoliovisualizer.com/bac ... on5_1=-200
Your backtests are based on a period of 10 years that did not display any serious downward trends like 2008 for example. Even march of this year is relatively tame when compared to volatility that could be expected over longer periods of time. This really seems like a bad case of recency bias.
In other words; If you had employed Hedgefundie's strategy the day UPRO was released, stayed the course and sold it yesterday you would have made exceptional returns.
It is unlikely to perform like that in the future.
That being said, If you find someone willing to lend you 10x your net worth under the following assumptions;
- The loan is not callable
- The interest rate is <1%
- No monthly payments are required to be made
- The lender is willing to part with this loan for 40 years
Then you could do great things with that leverage. You could leverage upwards, as you suggest. Or potentially use a more bond-heavy strategy to obtain the same return of a riskier portfolio at lower volatility levels.
Another name for such a loan would be a gift.
That being said, I have no intention of debating the odds of success of your strategy. All the best to you and good luck.
EDIT: 10x leverage clearly beats Jim Simmons - > 100% CAGR!:
https://www.portfoliovisualizer.com/bac ... on5_3=-900