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Surviving system meltdowns and cyber attacks

Photo of melting ice to represent a system meltdown

New contributor and perma-worrywart The Engineer is back with a new concern: how to survive system meltdowns or other malicious goings-on at your financial services provider.

These days, my biggest financial worry isn’t losing my money in the markets.

It’s losing access to it altogether.

Beyond investment risk, my concerns range from technology failures through corruption, cockups and business failures, right up to the overthrow of governments and the collapse of society. (Yet somehow, I sleep soundly at night.)

That’s quite a spectrum, so I’ll leave the zombie apocalypse for another day.

From power failures to hack attacks to system meltdowns

For now I’ll focus on something much more mundane but also far more likely than the walking dead swamping Clapham: losing access to my investments because of an operational or technology failure.

How can trouble at your financial services provider fail thee?

Let me count the ways.

Glitches

System hiccups and upgrade mishaps causing a few hours outage are common at investment platforms (and everywhere else) but they are rarely a cause for panic.

It might even be a good thing for some of us. You could go out and play in the sunshine for a while rather than sitting inside hitting refresh on your portfolio valuation.

Migrations

System migrations can sometimes cause longer outages.

In 2018, both the Aviva investment platform and TSB Bank suffered painful transitions to new technology. In each case, whilst the full outage only lasted around a week, some customers struggled for a lot longer.

If you’re living off your investments then that sort of lockout could sting.

Cyber attack

Then there are cyber attacks.

Earlier this year, both M&S and Jaguar were hit by ransomware attacks that knocked out key systems for around six weeks. For retailers, that’s painful. For an investment platform it could be terminal.

Financial services companies have no tangible product. All they do is move data around. If investors no longer trust the company to look after their data, then the business is effectively dead.

Personally, I’ll admit that life wasn’t easy without my online orders for M&S Oscietra Caviar, but I suspect having no access to my money would be tougher.

What’s the worst that could happen?

It can surely only be a matter of time before a big financial firm is hit by a major cyber attack. (Indeed I’ve heard unsubstantiated rumours that it’s already happened, but allegedly the consequences were so scary that the hackers were paid off.)

I doubt investor data records would vanish entirely – that would require a monumental series of cascading failures – but it’s quite easy to imagine an outage running into months.

With the reputational fallout, the firm might just throw in the towel. Once in receivership everything would slow to a glacial pace. You might not see your money for years.

My emergency cash wouldn’t touch the sides of that sort of funding gap.

Shouldn’t somebody do something?

The industry is far from blind to the risks.

In the last few years, the FCA has pushed for better operational resilience and information security. All the trade bodies seem to have specialised working groups on best practice and the platforms themselves generally seem engaged.

So we can all relax, right? Well, no.

Which platforms should we avoid?

I can’t give you a list of the safe platforms and the dodgy ones. That’s partly because Monevator doesn’t seem keen on being sued, but mostly because in my experience none are perfect and none are terrible.

They all have rather more bits of string and Sellotape holding things together than you might hope, but invariably they also have some good people trying to do the right thing.

Some practical steps we can take

A few simple precautions:

  • Keep records. Save a recent statement. It’s unlikely your provider will lose all data. But equally, it doesn’t take much effort to click save on a PDF. Just in case.
  • Choose big companies. Deep-pocketed parents are less likely to abandon a damaged subsidiary.
  • Invest through multiple platforms. Losing access to half or a third of your money would be alarming. But it would be a whole lot less alarming than losing access to all of it.

However, diversifying across platforms isn’t as straightforward as it sounds.

Eggs and baskets

Let’s say that after reading this article you are overcome by anxiety. With an abundance of caution, you spread your investments across four platforms: Vanguard, AJ Bell, Barclays Smart Investor, and Aviva.

Unfortunately, all your investment eggs would still be in the same technology basket: FNZ.

FNZ is the biggest technology provider in the UK platform market. It runs the underlying systems for many household names. So even if your assets are spread across different brands, they may all share the same machinery.

Note: I’m definitely not saying there’s anything wrong with FNZ. Indeed it’s clearly doing something right.

But if the goal is to reduce systemic risk, you need to use entirely different systems.

Investment platforms don’t usually highlight which technology they run on, but you can find out. The easiest way is to ask your favourite AI chatbot. It will work it out by trawling through old supplier press releases announcing new clients.

Beyond platforms

It’s not just the investment platforms we depend on. There’s a whole network of other organisations that also need to be functioning for us to turn our investments back into hard cash.

Should we worry about the fund managers we use? And what about the transfer agent that handles trading for them?

Instinctively these feel like lesser risks. They don’t need a public-facing web presence to function, and so may be less susceptible to attack.

Still, a risk.

How deep does the rabbit hole go?

We could go deeper and unearth yet more organisations to worry about.

What about the fund accountants and the payment services? What caterers do these organisations use? What if they all get food poisoning at the same time?

But there’s a time to stop digging for even the most paranoid investor.

Time to decide

I pretty much live off my money now and consequently tend to worry about these things more.

I use multiple platforms with different technology and invest with multiple fund managers (who coincidentally use different transfer agents but that wasn’t deliberate).

Of course, this isn’t just about cyber attacks. There are other reasons to spread your investments around – such as the regulatory compensation limits – but it’s good to understand these risks to help work out the best approach.

There’s no perfect answer, only whatever helps you sleep at night. Once you have an approach that works for you, stop stressing and move on to something else.

Keep records, use stable companies, spread your risk – and then relax.

Peaceful dreams!

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What derisking your portfolio looks like [Members]

Image of three planes gliding in to land

If you need to derisk your portfolio before retirement, what should your portfolio look like?

Once upon a time we got by with rules-of-thumb like:

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Our Weekend Reading logo

What caught my eye this week.

Despite our gloomy warnings about pricey stock markets and how every investment can fail you, we’re actually a pretty jolly crew here at Monevator.

Why wouldn’t we be?

For my part I long ago cracked the code of escaping the worst of the work world without giving up the income. And my co-blogger The Accumulator is forever chasing cows.

Happy days – so I think it’s high time we had a bit more fun about the place.

Yes, it’s mandatory Christmas party time!

Your Christmas party outfit sorted

Now, nothing says Yuletide office party like a Christmas jumper, right?

Even more so when you’re retired or working from home, and you want to stand out on a Zoom call.

Which is all a laboured way of revealing that my girlfriend has designed a special Christmas jumper – well, sweater really – that you can now bag at the Monevator shop.

Bulls, bears, and little tinsel decorations that look like share price graphs, it’s got it all.

How could you not want to be wearing one of these bad boys when the boss treats the team to a Christmas Nando’s:

Image: Monevator Christmas sweatshirt

There are two colours to choose from – blue and green – and again note that these are sweatshirts, not knitwear. (You can’t produce knitwear products on demand. Call me pessimistic but I wasn’t going to pre-order 1,000 in advance…)

So go grab one now to wow your friends, family, neighbours, and the postman.

(Note: wowing is not guaranteed, your mileage may vary.)

How to potentially win a Christmas sweatshirt

The forced fun doesn’t stop there. Because what’s an office party without prizes?

Yes, we’re going to give away three of these seasonal sweaters.

Full terms and conditions below (red tape in the UK? really?) but here’s the gist of what you need to do for a chance of winning one of the three Christmas sweaters we’re giving away.

Become a Monevator member

Sign-up to become a Monevator member between now and the end of Friday 12 December and you’ll automatically go into a random draw to win a Christmas sweater.

Refer someone who becomes a member

Back in June we launched a referral programme, where members can get discounted – or even free – membership by referring others who sign-up for an annual subscription.

That week saw a flurry (well, a handful) of referrals. But nothing since. I suspect our relentless focus on sub-optimal Monevator monetisation strikes again…

So I’m flagging the referral scheme once more. I’ve made it more generous, too.

As for this competition, refer a member who signs up for annual membership between now and the end of 12 December and you’ll go into a draw for a sweater.

Scroll down my previous post for details on how to refer someone. Note: you need to be on an annual membership for referrals to count.

Give some advice on investing

My girlfriend may be a talented designer of pixellated investing-themed Christmas sweatshirts, but she is not perfect.

In particular: she is insufficiently obsessed with investing.

So what inspiring advice would you give a 30-something who saves into her workplace pension but otherwise takes no interest in investing? Despite her boyfriend running a leading blog about investing?

Share 50-100 words on saving, index funds, retiring early, financial freedom, or any of the other topics we cover on Monevator (okay, maybe not leveraged ETFs) and you’ll go into a draw for a sweatshirt.

I will use a selection of these comments to create an article that I’ll then print out and leave conveniently in her make-up draw or in her car’s glove box.

She’ll surely be delighted!

Only initials or first names will be published if your advice is included.

You can either comment below, clearly stating a bit of investing advice, or get in touch with the comment form or with a reply if you’re reading this post on email.

Again, entries by the end of Friday 12 December please.

Now for that regulatory small print.

Monevator free prize draw: terms & conditions

1. Promoter: Monevator (monevator.com).

2. How to enter: You can enter the draw in any of the following ways:
(a) Sign up for Monevator membership;
(b) Refer someone who signs up for membership;
(c) Share some inspiring advice about investing via a comment, email reply, or the content form.

All valid entries receive one entry into the draw. No purchase is necessary because option (c) is free.

3. Opening and closing date: Entries open on 6 December 2025 and close at 23:59 on 12 December 2025. Entries received after this time will not be included.

4. Eligibility: Open to readers aged 18 or over. One entry per person. Monevator contributors and their close family members are not eligible. (Sorry!)

5. Prizes: Three winners will each receive one Monevator-branded sweatshirt. No cash alternative.

6. Winner selection: Winners will be chosen at random from all eligible entries within seven days of the closing date.

7. Notification: Winners will be contacted by email. If a winner does not respond within seven days, we may draw a replacement winner.

8. Data: We will only use personal details supplied for the purposes of administering this draw and citing any advice chosen for an article.

9. Use of comments: We may publish a selection of submitted comments in a future Monevator article. Comments will be published anonymously or using first names or initials only. By entering, you agree to this.

10. General: We reserve the right to withdraw or amend the promotion if necessary. Our decision is final.

Again, that’s three different ways to win one of three Christmas sweatshirts.

Ho ho ho! Have a great weekend.

[continue reading…]

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Our Monevator Moguls logo for our sophisticated investor articles, the text “Moguls” in a nice font

Note: at nearly 7,000 words, this deep dive into how to account for private assets in your record keeping is the longest piece we’ve ever published on Monevator. As such I’m aiming for it to be a ‘doubler’, to tide Moguls over the Christmas period and into 2026. Feel free to save it for Boxing Day!

Previously we’ve discussed how the recovery in the stock market since 2022’s speculative share rout has not lifted all boats. Especially not the unlisted but metaphorically listing private ones.

This article can be read by selected Monevator members. Please see our membership plans and consider joining! Already a member? Sign in here.
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