The Risks Hiding in Plain Sight: Five Left-Field Threats That Could Surprise Markets

Most investors are currently focused on the AI trade and the Fed since these are the main consensual drivers of global markets.  

The trouble with crowded trades is that everyone is looking in the same direction at once. 

That’s precisely when something unexpected tends to happen.  

This is why the dangers most likely to catch investors off guard are the ones lurking outside of mainstream investor and media attention; the left-field risks which most investors don’t believe are worth worrying about.  

Here are five of those left-field risks that arguably deserve more attention than they are getting: 

1. A private credit reckoning 

LIKELIHOOD: MODERATE   

POTENTIAL MARKET IMPACT: HIGH 

Private credit has been a global runaway success story since 2022.  

The global market has swollen to $2.1 trillion, up from $1.7 trillion in 2024, funded by pension funds, insurers and, increasingly, retail investors drawn in by the attractive headline yields on offer.  

Most of the leading global regulators keep insisting we’re not witnessing a swelling of systemic risk. However, the chorus is almost too co-ordinated to be reassuring. So far this year, the US Treasury Secretary, the SEC Chair, the IMF and the Federal Reserve have all said, in effect, nothing to see here. 

Yet there are visible cracks emerging if you look closely.  

In May this year, Fitch reported that the US private credit default rate hit a record 6.0% in April.  

Moody’s estimated that distressed restructurings, the debt exchanges and maturity extensions agreed under duress, accounted for almost two thirds of all 2025 private credit defaults. Strip those out and the picture looks more benign. Include them and it looks concerning, and probably a more realistic view of the underlying trends at play. 

The situation is similar in Australia.  

The RBA is bracing itself for rising defaults in the local private credit sector, as well as the potential knock-on effects. 

You may be wondering why this is a left-field risk when the major rating agencies are discussing it openly. Private credit risks are often outside of the mainstream financial conversation because the asset class is opaque, valued infrequently, and increasingly woven into the balance sheets of insurers and banks.  

On a more positive note, in most cases private credit fund leverage is modest, most capital is locked up for years rather than redeemable on demand, and there isn’t a 2008-style securitisation chain of comparable scale.  

Less comforting is the fact that this is a young asset class built in an era of cheap money which hasn’t yet been tested by a full default cycle.  

2. Another unwinding of the yen carry trade 

LIKELIHOOD: MODERATE-HIGH   

POTENTIAL MARKET IMPACT: HIGH 

On 5 August 2024, the Nikkei fell 12.4% in a single session, its worst day since 1987, wiping out $790 billion of market cap. The trigger was a modest Bank of Japan rate rise that forced a violent unwind of the yen carry trade, the decades-old strategy of borrowing cheaply in yen to buy higher-yielding assets elsewhere, including US tech stocks.  

Markets recovered within weeks, and most investors filed the episode away in their minds as a one-off. 

What if it wasn’t a one-off, though? 

What if it was a preview of coming events? 

Since late 2025, the Bank of Japan has been raising and thus normalising rates. By mid-2026 the short-term policy rate reached 1.0%, its highest level since 1995, and the 10-year Japanese government bond yield climbed to 2.85%, a level not seen since the late 1990s.  

For the first time in a generation, Japanese pension funds and insurers can now earn a real return at home, in their own currency, without taking currency risk on US assets.  

It wasn’t surprising that Japan sold almost US$30 billion of US Treasuries in the first quarter of 2026 alone, the fastest pace in four years. 

The mechanism worth watching is reflexive in nature. As Japanese yields rise, the carry trade loses its edge, investors who borrowed yen must buy it back to repay, the yen strengthens, and that forces further unwinding.  

A large share of global yen funding runs through FX swaps rather than plain borrowing, which makes it more sensitive to volatility spikes.  

The historic trigger level to keep an eye on is the USD/JPY exchange rate moving sharply above 150 (at the time of writing it’s already in the danger zone at 159.4).  

The key takeaway is that one of the largest funding trades on earth is being slowly defused, and slow defusals tend to be triggered into accelerations by relatively benign market shifts. 

3. A resurgence in AI-driven inflation 

LIKELIHOOD: HIGH   

POTENTIAL MARKET IMPACT: HIGH 

The irony at the heart of the AI trade is that the very boom propelling equity indices to records may contain the seed of its own correction.  

Reuters recently warned that AI-driven inflation is 2026’s most overlooked risk. Their logic is straightforward. Waves of government stimulus across the US, Europe and Japan, combined with the multi-trillion-dollar hyperscaler build-out, are pouring money into a global economy that’s already running warm. Data centres consume vast amounts of power, driving up energy and construction costs, while the capital expenditure itself is inflationary. 

If inflation does indeed re-accelerate and central banks shift toward a tightening bias, the easy-money conditions underpinning speculative tech valuations are likely to tighten.  

As one multi-asset head put it, the bubble needs a pin, and the pin will probably come through tighter money. It would most likely raise funding costs for AI projects, compress tech profits and, by extension, deflate the momentum-driven stocks carrying the market.  

A global tech de-rating would probably impact everything from super fund balances to the local market’s growth stocks. 

4. Imbalances created by concentration risk 

LIKELIHOOD: HIGH 

POTENTIAL MARKET IMPACT: MODERATE 

High concentration risk is hiding in plain sight because it tends to dress like success.  

The ten largest stocks in the S&P 500 now account for around 40% of its total value.  

Global earnings growth has become increasingly dependent on this small set of companies, most of which are driven by AI capital spending.  

The issue is that when a handful of names drive a disproportionate share of returns like this, a passive, and seemingly diversified, global equity ETF can actually be a concentrated bet on a single theme. 

Australians aren’t immune, and in some ways are more exposed to this risk.  

Domestic ETFs carry their own concentration risk in banks and iron ore.  

Add in global equity ETF exposure and many portfolios are doubly concentrated: heavy in a few Australian financials and miners, and heavy in a few US mega-caps, with far less genuine diversification than their fund count suggests.  

5. Stablecoins and the plumbing of the Treasury market 

LIKELIHOOD: LOW 

POTENTIAL MARKET IMPACT: MODERATE-HIGH 

The growth in stablecoins is creating our fifth and final left-field risk.  

Stablecoins, the dollar-pegged crypto tokens used to move money around digital markets, have grown into a powerful force in short-term funding markets. $281 billion was outstanding in March 2026, 99% of which was backed by US dollar assets, much of it short-dated Treasuries.  

Citigroup research projects this market could reach anywhere from $0.5 trillion to $3.7 trillion by 2030. 

The potential left-field risk is a classic maturity mismatch.  

Stablecoins promise instant redemption, but the Treasuries backing them settle in a market that closes.  

A sudden loss of confidence could force issuers to dump Treasury holdings to meet redemptions, transmitting stress from an apparently contained corner of the crypto world straight into the broader market that underpins global borrowing costs.  

On that note, the Bank Policy Institute has warned that fiat-backed stablecoins at systemic scale can pose financial-stability risks through exactly these liquidity and feedback channels.  

It’s a low-probability, high-impact scenario worth being aware of because almost nobody outside financial-plumbing circles is. 

Building a portfolio that can take unforeseen punches 

Cataloguing left-field risks like these is the easy part.  

The harder and more useful response is what to do about them before they potentially strike, while recognising that predicting the future is impossible. 

With that goal in mind, here are a few principles worth weighing up:

1. Diversify across assets with genuinely different drivers 

Owning forty funds that all rise and fall together isn’t genuine diversification.  

The test for any new holding is simple: does it benefit from different drivers (and thus a low correlation) versus your existing portfolio?  

For example, gold has historically excelled in this respect, which is part of why central banks bought a record 289 tonnes in the second quarter of 2026 even as the price wobbled.

2. Know your hidden concentrations 

It is time to be honest about your concentration risk.  

If your global equity fund has a 40% mega-cap tech weighting and your Australian fund is 40% exposed to the banks and miners, you may be holding two concentrated bets dressed up as a diversified whole.  

Understanding this is the first step to deciding whether you are comfortable with these risks.

3. Hold cash and short-duration fixed income 

Every risk on this list, from a private credit freeze to a carry-trade unwind, is fundamentally about liquidity drying up at the wrong moment.  

Enter cash and high-quality, short-duration fixed income funds as portfolio ballasts which are largely protected during market selloffs.  

These are unglamorous assets by their very nature, but they enable investors to act when others are forced to sell. In a stress event, the investor with dry powder can buy from the investor who is forced to sell at a discount.

4. Prioritise transparent asset classes which match your time horizon 

Opaque, hard-to-value, infrequently-priced assets carry a premium yield for a reason.  

They can be a fair trade if your money is genuinely locked away for years and you understand what you own.  

They may be a poor trade, though, if you need the money sooner, or if the yield on offer is the only reason you invested.  

Fees, liquidity terms and redemption mechanics are as important as the headline return.

5. Consider resilience themes, on their own merits 

Finally, structural themes can enhance portfolio stability in the event a number of these left-field risks play out.  

For example, real assets and infrastructure generally offer inflation protection, while sustainable and quality-tilted strategies can enhance portfolio durability and resilience at times when momentum shifts.  

Bringing left-field events into the main game 

Whether any of these five left-field risks play out before the end of the year is anyone’s guess, but it’s likely that some or all of them will rock markets at some time in the future. 

With that said, none of them represent a good reason to sit in cash and wait for the sky to fall. Markets have climbed a wall of worry for the better part of two centuries.  

Being unsurprised by future market surprises is the goal. By staying calm and following your plan, you’ll be positioned to survive and thrive while the rest of the market reaches for the sell button. 

Disclaimer: This article is prepared by Simon Turner. It is for educational purposes only. While all reasonable care has been taken by the author in the preparation of this information, the author and InvestmentMarkets (Aust) Pty. Ltd. as publisher take no responsibility for any actions taken based on information contained herein or for any errors or omissions within it. Interested parties should seek independent professional advice prior to acting on any information presented. Please note past performance is not a reliable indicator of future performance.