Author Topic: Recalculating Merton Shares for the Trump "Tariffs Economy"  (Read 1160 times)

SeattleCPA

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Recalculating Merton Shares for the Trump "Tariffs Economy"
« on: April 05, 2025, 06:54:32 AM »
I know a tiny handful, a tiny handful, of MMMers like me are thinking about and applying the Merton framework.

Thus, I thought it'd be useful to share my updated Merton share calculations.

If I use either Vanguard's most recent late March market outlook or a CAPE 10 based forecast of equity returns, and I use last week's incredible volatility (45% as measured by the VIX), I get the following suggested equity allocations:

For investors truly willing to bear more risk: roughly 65% if all US and maybe 75% if half US and half non-US.

For the typical "moderately risk averse" investor going all US stocks: roughly 20% to 30% if all US and maybe 25% to 35% if half US and half non-US.

We live in an age when things are incredibly politically polarized. But I feel like to add context here, I should disclose my biases...and my own asset allocation. Thus, these remarks: Politically I'm a proponent of globalization and low regulation and free markets. So classical liberalism. Or the old Republican party? I also voted against Mr. Trump all three times.

Also this remark: I'm thinking we're in a bad patch of economic history right now. But I'm sticking with my 65% allocation to equities. Even though I expect things to get worse and stay bad for a while. (I remember the stagflationary economy of the 1970s. And it sucked.)


SilentC

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #1 on: April 05, 2025, 10:52:24 AM »
65% is perfect.  That’s about where we are, with the equities almost 50/50 US Intl.  I think the worse the market gets the more attractive ex-US gets, because it means more pain/ more catalyst for other nations to minimize exposure to US trade etc.

SeattleCPA

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #2 on: April 05, 2025, 08:31:31 PM »
We are a club of two. :-)

EscapeVelocity2020

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #3 on: April 06, 2025, 09:14:27 AM »
You've piqued my interest in 'The Missing Billionaires' so I'm going to start listening to the audiobook on my walk today.  I currently think this equity allocation formula is about as rigorous and definitive as Trump's retaliatory tariff formula (you start with a desired outcome, then torture the numbers until they fit your world view)...  but I'm open-minded to the subject matter, so maybe I'll pick up a few insights.  We live in frustrating investing times when stuff like 'Newsmax' and Gamestop can shoot to wildly speculative market caps, so I welcome a bit of framework setting.  My favorite investing book is still Peter Lynch's "One Up On Wall Street".  I guess you could call that style "vibe investing".

This volatility will be with us for some time and I'm heavy in money markets / stable value (after selling my most risky positions), so I need to pass the time as I DCA back toward my target AA.  Hopefully this thread keeps going until I've made it through the book!

ChpBstrd

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #4 on: April 06, 2025, 11:41:14 AM »
The US seems determined to shoot itself in the foot. That's risky when its stocks, bonds, and real estate are at such high valuations.

I have a similar mentality about the investing dangers of bad governance and instability, but a different approach to mitigating that risk.

I don't see international markets as vastly more attractive (see similar governance challenges and instability emerging in Europe, Latin America, and other markets). So my objective has been to use collar strategies to reduce the volatility of my 90+% stock portfolio in half, and to set a firm floor on the damage that SORR events can do. When I trade a collar, I set myself up to have more upside potential than downside.

That's very similar to the goal of a more-diversified portfolio, but I chose my approach because it seems like all markets are moving in broad risk-on, risk-off ways, rather than acting as true diversifiers. 2001 and 2008 caused significant damage to value stocks, and to stocks domiciled far away from the epicenter of the panic. 2022 wiped out bonds and even TIPS, making traditional diversification nearly useless!

So my way of responding to the same problem is different than reallocating Merton shares of an AA. It's instead an attempt to ratchet the portfolio up, year after year, with a progressively higher floor on the possible return distribution and plenty of upside to capture the bull runs which can occur despite all the problems.

Because I operate with contractual protection that establishes a firm floor on returns, I can allocate more to stocks without worrying about being wiped out in a bear market. I.e. it is possible for a 95% stock AA to have the volatility of a 50% stock AA, and you get firm insurance against SORR events as an added bonus. I don't know if one could say the same about a portfolio heavy in long-duration bonds, or UK stocks, for example. 

SeattleCPA

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #5 on: April 07, 2025, 06:33:28 AM »
I currently think this equity allocation formula is about as rigorous and definitive as Trump's retaliatory tariff formula (you start with a desired outcome, then torture the numbers until they fit your world view)...  but I'm open-minded to the subject matter, so maybe I'll pick up a few insights. 

I think you'll change you mind. About the Merton framework, I mean.

Trump's tariffs? I consider those high buffoonery.

P.S. I had to read Missing Billionaires a couple of times, and very carefully, to feel like I understand the math. (An audible book would make it very difficult for me to have soaked up the logic.) But after that reading I could basically comfortably with with the math at an apprentice level. I did a couple of mechanical blog posts that provide simple JavaScript calculators that do the math. This one, https://evergreensmallbusiness.com/super-safe-withdrawal-rate/ , includes a chart the visually explains what the Merton framework tries to capture.

P.P.S. You might find a quick skim of this earlier thread useful: https://forum.mrmoneymustache.com/investor-alley/the-missing-billionaires-(a-book-about-investment-risk-management)/ and @ChpBstrd and I had a really constructive IMHO debate/discussion in this thread where he raises many good points about what Merton framework does and does not do: https://forum.mrmoneymustache.com/investor-alley/using-robert-merton's-math-to-calculate-in-stocks-and-a-super-safe-swr/

EscapeVelocity2020

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #6 on: April 07, 2025, 09:33:43 AM »
I think you'll change you mind. About the Merton framework, I mean.

Trump's tariffs? I consider those high buffoonery.

LOL, and thanks for the further reading and background, I love a challenge.  I'll finish the audiobook and see if I'm swayed to go further!

EscapeVelocity2020

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #7 on: April 09, 2025, 02:26:48 PM »
...
I don't see international markets as vastly more attractive (see similar governance challenges and instability emerging in Europe, Latin America, and other markets). So my objective has been to use collar strategies to reduce the volatility of my 90+% stock portfolio in half, and to set a firm floor on the damage that SORR events can do. When I trade a collar, I set myself up to have more upside potential than downside.
...

When you have volatility like we've been experiencing, I'd be nervous that a collar backfires.  The volatility premiums are also outrageous these days. 

The 'pros' are pointing out that TIPS offer 2.7% risk free 30 year yields, so there is still an expectation that a balanced portfolio is 'cheap' otherwise everyone would be buying these TIPS.  So I definitely have a sympathetic ear to try to set up a balanced portfolio that captures this long term value.

ChpBstrd

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #8 on: April 10, 2025, 06:44:09 AM »
...
I don't see international markets as vastly more attractive (see similar governance challenges and instability emerging in Europe, Latin America, and other markets). So my objective has been to use collar strategies to reduce the volatility of my 90+% stock portfolio in half, and to set a firm floor on the damage that SORR events can do. When I trade a collar, I set myself up to have more upside potential than downside.
...
When you have volatility like we've been experiencing, I'd be nervous that a collar backfires (a).  The volatility premiums are also outrageous these days (b)
These issues are addressed by:
(a) Set upper and lower boundaries (strike prices) that allow sufficient room to run, but that would catch the portfolio during a real SORR event. E.g. 10% downside and 15% upside per year.
(b) Always set up collars with >1 year duration (the more the better), and always roll them up and out when you have between 3-6 months left. This way, you can trade on lower volatility days when calls cost a lot more than puts and far-OTM options are relatively cheap. You also don't get caught with a falling delta close to expiration.

Definitely a person playing with collars every 30 days and with just a few percent of wiggle room is going to get a worse outcome in a market such as this. For some reason that's the illustration usually used on financial education websites, and it makes no strategic sense.

GuitarStv

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Re: Recalculating Merton Shares for the Trump "Tariffs Economy"
« Reply #9 on: April 10, 2025, 08:31:07 AM »
The price of US companies has been buoyed by the States being a place of rule of law, democratic transition of power, ease of trade around the world, and relatively low corruption.  As all of these erode under Trump, American stock prices start to look more and more overvalued.