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The week's question
In March 2025, in the thread "Re: OT, out", Umm asked the members: "Do you think it is because America is made up of magical soil that makes businesses based in America magically profitable?" This week it is put to everyone again. The button below opens the small thread re-asking it - read what others have said so far, then give your own answer as an ordinary reply.
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Investment Strategies / Mechanical Investing
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Author: rayvt ✧☼🐝🐝  😊 😞
Number: of 6243 
Subject: Re: Wild-and-crazy idea
Date: 08/15/23 11:03 AM
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No. of Recommendations: 8
2011 - 2023 was a strong market. How would this strategy have done from 2000 - 2009?

As Henry Wadsworth Longfellow said, 'when she was good she was very very good. But when she was bad she was horrid.'

Better make sure your life insurance covers jumping out of a skyscraper.


Growth of $1000
Actual, week close-to-close, 2/12/10 to 6/16/23
QQQ:: $8408
TQQQ: $94,324

Computed from yahoo daily data:
QQQ: $8425
3X:: $102,641

Computed vs actual is close. Chart of TQQQ and 3X the lines are largely on top of one another.
Therefore the computation is close to being real life.

Computation applied to the actual QQQ data, 3/10/1999 to 2/10/2010, daily close to close:
Growth of $1000:
QQQ: $842
3x:: $13 (not a typo)

The good(?) news is that 3X would then grow to $1450 by 6/16/23.

I had always assumed that when they said "daily return" it meant open-to-close. But close-to-close fits the actual data.
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This community has written 6,227 posts about Mechanical Investing. The article-length ones it recommended most:
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