The first Weekend Reading every month can be read by anyone on the Monevator website. Subscribe [1] for free to our email newsletter or become a member [2] to ensure you see the rest.
What caught my eye this week.
Would you be happy handing over the reigns of your portfolio to a robot? Given most of you will be regular Monevator readers and email subscribers, I can guess the answer – if not the specific gentle expletive added for colour…
Of course, the typical Monevator reader (rightly) invests passively in index tracker funds. And those funds are managed by software – albeit usually with some kind of human oversight to determine which companies go in and come out of a given index, as we saw with the recent controversy [3] over SpaceX.
However it’s one thing to use software to follow a well-established and diversified benchmark via what’s now very mainstream index fund investing. It’s another to toss the keys to a novel AI agent with a cheery, “have it it, call me if you blow the kids’ inheritance!”
Okay, in practice any self-driving portfolio is going to have guardrails. But even so, you can easily imagine countless robot investing edge cases that are the financial equivalent of a self-driving car facing a hotdog cart trundling into the road, or the driver in front falling asleep at the wheel.
Or consider the market madness proxy of gridlock and traffic jams, when movement (liquidity) evaporates.
Think back to the crazy ride that was the Covid crash [4]. How would a cheapo trading robot cope?
Investing under the AI influence
Naturally, just because we don’t need self-driving portfolios, that doesn’t mean we won’t get them.
Innovation in financial services is driven by what sells, not what is good for us.
Only this week CNBC [5] reported that:
Larger brokerages are moving in [this] direction. Robinhood in May introduced tools allowing third-party AI agents to connect with customer accounts. Brokerage firm Public, meanwhile, is developing AI agents in-house that can automate investing workflows within its platform.
“What this era of agentic is doing … it goes away from just being able to research something by yourself and then make up your own ideas and then trade the way you’ve traded where it’s now becoming automated and where AI agents can actually execute investment strategies on your behalf,” said Leif Abraham, Public’s co-founder and co-CEO.
The article paints a breathless future of AI agents turning private investors into DIY hedge fund managers. There’s nary a mention of fees and costs, though – although to be fair the piece does conclude with caveats about the risks of letting Clippy [6] 2026 trade stocks.
That latter sentiment is echoed by a blog from the CFA Institute [7], which reviewed the *cough* mixed results from research into trading via LLMs.
It concluded:
The evidence for multi-agent and LLM-augmented portfolio construction is promising. The failure literature does not invalidate this, but it does suggest that the gap between a research prototype and a production-grade institutional system is larger than the paper acknowledges.
The human overseer […] cannot yet take a purely passive safeguard role.
But who am I kidding? The reality is tens of thousands of retail investors are already experimenting with AI trading, whether through financial service scaffolding such as RobinHood [8] or via the – hopefully judicious – interrogation of their nearest chatbot.
Top gear
As far as I can tell, this era’s Warren Buffett – part-man, part-machine, all alpha – has yet to reveal himself.
But if enough people do it then we’ll probably get an AI-enabled self-made trader billionaire someday, just thanks to the law of averages.
Famously, a few quant shops like Renaissance [9] have smashed the market for years by force feeding gargantuan amounts of data into supercomputers. However that’s very different from Joe Day Trader setting a few rules in an AI-enabled investing account.
Yet even a few [10] traditional stock picking active managers do beat the market, at least for a while, and no doubt so will some AI agents.
The odds have always been against it however – active investing is a zero-sum game [11] – and AI cannot change that.
Have a great weekend.
From Monevator
The Slow & Steady Passive Portfolio update: Q2 2026 – Monevator [12]
A deep dive into FX hedging – Monevator [13] [Moguls [2]]
From the archive-ator: Compound interest can save our pensions – Monevator [14]
News
Chancellor announces his first Budget will be on 28 October [Sigh] – BBC [15]
Bank of England holds rates at 3.75% as inflation fears mount – Guardian [16]
One million more Britons set to pay income tax – Which [17]
Ban foreign stocks from Isa wrapper, says top pensions boss – City AM [18]
BP puts its North Sea business up for sale – This Is Money [19]
London only English region to see population fall – BBC [20]
It now takes 216 days to move home – This Is Money [21]
UK millionaires fall to 442,000, lowest since 2008 – Business Matters [22]
House prices up just 0.1% in July, says Nationwide – Mortgage Strategy [23]
Jim Leaviss, Bond Vigilante, 1971-2026 – FT [24]
[25]
We’ve moved from income world to wealth world [Paywall] – FT [26]
Kospi’s boom-bust-boom mini-special
South Korean bubble bursts, erasing $2.2trillion in value – Mugglehead [27]
Minister apologises as leveraged ETF investors suffer deep losses… – CNBC [28]
…while AI fund Situational Awareness dumps holdings to Citadel… – CNBC [29]
…and then the Kospi closed up a record 18% in a day on Friday – Korea Times [30]
It’s all because the AI boom creates a lot of uncertainty – Noahpinion [31]
Products and services
Disclosure: Links to platforms may be affiliate links, where we may earn a commission. This article is not personal financial advice. When investing, your capital is at risk and you may get back less than invested. With commission-free brokers other fees may apply. See terms and fees. Past performance doesn’t guarantee future results.
Is your annual travel insurance still worth it? – Which [32]
The fake Spotify emails that put you at risk of fraud – Guardian [33]
Paragon Bank cuts five-year buy-to-let mortgage rates – Mortgage Strategy [34]
Get £100 to £3,000 cashback when you open an Interactive Investor [35] SIPP. Minimum £20,000 deposit. Terms and fees apply, affiliate link – Interactive Investor [35]
Does Saga’s best buy interest rate for over-50s live up to the hype? – Which [36]
A sea view could cost you up to £220,000 more – This Is Money [37]
Get up to £1,500 cashback when you transfer your cash and/or investments to Charles Stanley Direct through this affiliate link [38]. Terms apply – Charles Stanley [38]
European wildfires and travel insurance – Which [39]
Save up to 47% on your home by doing the postcode switch – What Mortgage [40]
Charming homes for sale with family gardens, in pictures – Guardian [41]
Comment and opinion
Scotland’s 48p tax rate may be losing money – Tax Policy Associates [42]
Britain has tried War Bonds before, and savers paid the price – CNBC [43]
How to think about the ‘full price’ – Best Interest [44]
What 125 years of data tells us about investing – Behind the Balance Sheet [45]
The wickedness of wealth management – The Net Worthwhile Weekly [46]
Market indicators – Humble Dollar [47]
Now show Japan – A Wealth of Common Sense [48]
The problem with optionality – Of Dollars and Data [49]
Retirement income security and more [Podcast] – Morningstar [50]
Naughty corner: Active antics
IPOs have been a losing bet since 2019 – Apollo [51]
SpaceX, PE, VC, and quacking ducks – The Falling Knife [52]
Investment wisdom culled from old clip outs – Cove Street Capital [53]
Cashing in on Japan’s cross-shareholdings – Verdad [54]
Copart: from scrap to scale – Fiscal.AI [55]
Picking stocks in a bloodbath – A Wealth of Common Sense [56]
When size falls short – Novel Investor [57]
Kindle book bargains
What They Don’t Teach You About Money by Claer Barrett – £0.99 on Kindle [58]
Taxtopia by The Rebel Accountant – £0.99 on Kindle [59]
The Savvy Spender by Megan Mickelwright – £0.99 on Kindle [60]
The World for Sale by Javier Blas and Jack Farchy – £0.99 on Kindle [61]
Or read one of the all-time great investing classics – Monevator shop [62]
Environmental factors
New solar panels in Great Britain at 15-year high as fuel costs soar – Guardian [63]
French climate lawsuit a window into next global legal fight – The Conversation [64]
AI, authors, and writing mini-special
How AI books sneak their way into stores – New York Times [65]
ChatGPT is blocking requests to copy an author’s style – Ars Technica [66]
AI has made the ‘dead Internet’ theory come true – Futurism [67]
Robot overlord roundup
[68]
Anthropic’s soaring AI revenues compared to some famous other brands – Axios [69]
What will more intelligence actually do for us? – Noahpinion [70]
How to lose AI in ten days – Spyglass [71]
Not at the dinner table
The US economy is just a VIP list now – Your Brain on Money [72]
In defence of gerontocracy – The Argument [73]
The masculinity scam – The Atlantic [74] [h/t Abnormal Returns [75]]
Donald Trump keeps losing the Iran War – Drezner’s World [76]
The Putinization of the American military – Paul Krugman [77]
Off our beat
Could a single pathogen bring down civilisation? – Next Big Idea Club [78]
How a near-death experience led to finding sea dragons in Wales – Guardian [79]
Sell the company for $400m? He’s giving it away instead – N.Y.T. [80]
Why America’s super rich have embraced British football clubs – CNBC [81]
The light narrows – Aeon [82]
Poor countries are aging fast but can’t keep up with the cost – W.S.J. [83]
Scientists rethink sun exposure risks and benefits – Scientific American [84]
An uncomplicated man [On The Odyssey movie] – London Review of Books [85]
How to exist – Raptitude [86]
Who dares ridicule Gianni Infantino? – Guardian [87]
And finally…
“Stop thinking about what your money can buy. Start thinking about what your money can earn. And then think about what the money it earns can earn.”
– J.L. Collins, The Simple Path to Wealth [88]
Note this article includes affiliate links, such as from Amazon [89] and Interactive Investor [90].