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Charlie's avatar

Russel do you follow Gary Marcus (as a qualified counter balance to some of the more egrarious AI hype). Asking as I've always found his scaling arguments persuasive and the GPT-5 launch does nothing (imho) to weaken them. I mention this because I think the mounting evidence that throwing ever more raw compute at LLMs will hit a performance wall is exactly what could unravel the capex spend. FYI, I'm a CompSci guy in real life so have a reasonable grasp of the mechanics behind LLMs & transformer architectures.

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Charlie's avatar

Adam Butler's post yesterday is a good read on this too: https://x.com/GestaltU/status/1954561703967867019

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Charlie's avatar

Asking this mainly because you mentioned a capex taper would strengthen the treasury bull case. We haven't seen that yet but maybe it's coming (the costs openai have spent on GPT-5 will have been enormous, hard to see them doing it all again for GPT-6 if there are increasing fears over diminishing returns from extra compute)

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Russell Clark's avatar

Yes - more evidence seems to be building that there is a declining return on investment to ChatGPT... but it is seen as so strategic, does capex get switched, not cut? I dont know.

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Russell Clark's avatar

I thought DeepSeek would strengthen the argument to take a pause on capex... but the opposite occurred. I think it more psychological than financial.. todays winners are the true believers of the last cycle.

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Monty Carlo's avatar

All these discussions miss the big picture of debt - I guess it can be repeated ad nauseam, but if your debt-to-GDP hits levels that are already overdrawn in US debt-to-GDP levels, the picture changes from all-in treasuries to "don't touch them with a 100-foot-pole".

The picture is as murky because no one the hell knows what Trump is going to do next to poop on your party.

Is he going to announce a 2000% tariff on potatoes? Is he reversing stance on his new 15% contribution from chipmakers who sell to China? (And why is this not weighing heavily on those overprices stocks - he's gonna take 15% of their margin as a "tribute" while his administration (rightfully) stated security implications for high-end inference chip sales to China. Now, with 15% slapped into the margin - making theim either more expensive to China or the seller lose margin - no security issues anymore?

How does one buyer trust the US administration to buy their debt-fueled crack-up boom that's likely the outcome of these delusional roundhouse kicks to everyone's face?

Why anyone bought their debt at real negative rates was already a mistery - if the long curve does not go towards 8% as a risk premium (minimum), who else will buy but a weaponized Fed?

It's looking like the 70s - 80s all over again - and for all the wrong reasons, too.

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Amir Goren's avatar

Trump created a false impression that tariffs balanced the budget based on the June number. Tomorrow's July deficit will show otherwise.

Combined with unfavorable CPI numbers, we'll have another leg higher in yields.

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Russell Clark's avatar

Inflation does help balance budgets... Japanese budget deficit numbers have improved a lot

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