Re: BCC Updated to 04/10/2026

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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No. of Recommendations: 7

Post date for the 99-day rule (DBE) was September 2008.

Author: mungofitch
Subject: Getting away from the bear
Date: 9/27/2008
The test is whether the S&P made a new 99 day high in the last 99 days.
web.archive.org - Getting away from the bear
https://yorickm.com/Message.php?pid=27035352
The Motley Fool: Message

The GTR1 version of DBE checks for 99-day high over the past 99 days.

Create [DBE]: [Maximum of [[[Closing g-price]/[Highest closing g-price over 98 days]] > 1 ? 1 : 0] over 99 days]
step0: [DBE] == 1; Cash When None
Holding period = 1 mkt days
gtr1.net: GTR1 Backtester

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This community has written 6,224 posts about Mechanical Investing. The article-length ones it recommended most:

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