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Investment Strategies / Mechanical Investing
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Author: Aussi   😊 😞
Number: of 3957 
Subject: Does Trend Following Still Work on Stocks?
Date: 06/05/2025 5:19 PM
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No. of Recommendations: 10
A paper, Does Trend Following Still Work on Stocks? by Carlo Zarattini1, Alberto Pagani2, Cole Wilcox which updates a paper from 2005. Their conclusion is that trend following still works.

https://papers.ssrn.com/sol3/papers.cfm?abstract_i...

I tried to replicate the paper using GTR1 but had to make some modifications. The paper uses all time high to enter a position. I used 52 week high.

The paper used an escalating stop loss that is shown on page 6 of the paper. It uses power value of 10, When I used a value of 10, the stop loss was never invoked. I used a power of 5 (there may well be an error in my code for determining ATR over 42 days).

For the NAS100 since 1985,GTR1 (see link below) had:

CAGR 16%
SAWR 9.6%
MDD -62%

I have not included friction. If I were to implement this screen I would not rebalance so friction would be fairly low. However, with GTR1 using shrink and a rebalance period of one day, GTR1 would show substantial friction

^N1T for the period is:

CAGR 14%
SAWR 4.7%
MDD -81%

My conclusion: Nice to see that trend following works! I won't be implementing their method.

Aussi

https://gtr1.net/2013/?s19850201h1::nas100.a:et1:r...

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Author: FlyingCircus   😊 😞
Number: of 3957 
Subject: Re: Does Trend Following Still Work on Stocks?
Date: 06/05/2025 11:48 PM
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Ok. Here's the last part of the abstract. I'm going to "torpedo" this.

"While the theoretical portfolio exhibits exceptional gross-of-fees performance from 1991 until 2024 (e.g., a CAGR of 15.19% and an annualized alpha of 6.18%), its extensive daily turnover poses a significant challenge once transaction costs are considered. Examining net-of-fee performance across various asset under management (AUM) levels, we find that the base trend-following approach is not viable for smaller portfolios (AUM less than $1M) due to the dampening effect of trading costs. However, by incorporating a Turnover Control algorithm, we substantially mitigate these transaction cost burdens, rendering the strategy attractive across all tested portfolio sizes even after fees."

Extensive daily turnover? They didn't, did they really?

The one trend method they tested was "we use an all-time high breakout as the trend signal".

An automatic exit based on Average True Range violation? "We implement a trailing stop designed to adapt dynamically as the trade progresses. At the close of day t, the trailing stop level is calculated using the 42-day ATR..."

<yeah, they did do daily stop-loss via the ATR>

# of open positions varied from barely above 0 to just under 1,600 depending on market conditions, interest rates, other exogenous.
1600 positions? daily new highs?

The red line in Figure 16 reveals that the daily number of trades, driven primarily by frequent small position rebalancements, is so high that it could pose significant challenges to
implementing this portfolio in real-world scenarios, especially for less-capitalized trading
accounts.


cough...

FC's pompous analysis conclusion: this analysis is an ivory tower exercise and the headline is clickbait. Based on
- an unimplementable strategy for anyone, even an ETF
- two (2) trend factors, one bullish and one bearish: all time high paired with violating lower ATR
- daily turnover
- didn't bother reading through Daily Turnover Control algorithm, whatever at that point
- "less capitalized trading accounts"? NO ONE with a job and a life is going to commit money to this approach. Even if you had over $1M. Come on.

Bottom line: Trend following CAN work and DOES work - with realistic, achievable real world criteria with widely available data. In the famous old Monty Python episode including the Argument sketch, Graham Chapman played it:
https://youtu.be/3ANufwUPFm8










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Author: brian304   😊 😞
Number: of 3957 
Subject: Re: Does Trend Following Still Work on Stocks?
Date: 06/06/2025 9:33 AM
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No. of Recommendations: 11
I listened to numerous interviews of Eric Crittenden as I remembered reading the original paper and trying to re-create it. IIRC in the interviews he talks about using filters, and other rebalancing tools. I think he went on to sell that money management firm, took some non-compete time off to do research and then started Standpoint Capital Management (BLNDX fund). I think BLNDX is 50% in a global stock index and 50% in their 'simple' trend following model. The fund had a good run from 2020 inception (who didn't) and then took a 20% header in the tariff tantrums. Honestly, based on his methods and his very high level of quant skill, I was surprised at the 20% DD. I think it recovered a bit. His interviews are definitely worth listening to.

If you stick to the stuff on this board (timing and screens, etc) AND if you stay with it you will be better off than sending money to these alt fund guys or using fancy ETFs, like buffered stock ETFs and that kind of stuff. Looks good until it doesn't. My accounts with 70% stocks (my dividend screen) and 30% short term Treasuries were down about 10-12% but have recovered nearly to their recent all time highs.

Just my thoughts.

Thanks
Brian
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