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Jaewon Jung's avatar

Nice to see you're back on writing. I love the title and appreciate the shoutout!

I recreated the classic permanent portfolio (with annual rebalancing) in QuantMage back then (two years ago):

https://quantmage.app/grimoire/4e7277e31df81ab4022c21f682a3ce9b

Here is the version with the momentum filter (and a threshold rebalancing) I just made up:

https://quantmage.app/grimoire/d84faa2361adc2db21d7954ebc53fbee

Inverse volatility weighting can be used instead of equal weighting there, but it'll still be different from what you described since the volatility will be measured for the momentum-filtered return of each asset, not for the raw return.

Coincidentally I created this spell in June, which uses the same three assets and the same filter except using QLD instead of QQQ:

https://quantmage.app/grimoire/953a07f1150483fe7a205bef4befb9d1

It somewhat arbitrarily varies the checking days of each asset signal (from 3, 5 to 7) to produce a better historical outcome. Still I think it's remarkable that such a simple strategy can produce a MAR ratio bigger than 1 :)

V Regan's avatar

Thank you, Martin, for putting in so much work and then letting the investor community know your thoughts. You are clearly working through the process and I very much look forward to seeing your next steps. I was glad to see your concern for an earthquake on the west coast since I live in California. ;-)

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