Why Are Asset Prices So High in 2025? A Guide for UK Investors

3) Scarcity of equity and small floats

There are fewer listed companies than a decade ago, and many new IPOs come to market with tiny free floats. That makes “hot” deals easy to squeeze higher. Meanwhile, steady buybacks reduce the supply of shares over time, supporting prices.

4) Options leverage and reflexivity

Short-dated call options and structured products amplify moves. Dealers hedging flows can create powerful feedback loops, especially around earnings. This helps explain how large caps can jump 20%-40% in a session when positioning is offside.

5) Inflation psychology and the “cash is trash” instinct

After several years of elevated inflation, many investors distrust cash. That pushes them towards equities, real assets, Bitcoin and gold as perceived stores of value. Whether or not that is wise, the behaviour itself lifts prices.

6) Narrow market breadth

A small group of mega-cap winners has an outsized impact on indices. If the leaders keep delivering, headline indices look unstoppable. If leadership stumbles, the air can come out fast.

7) Storytelling power

AI, next-gen computing and digital scarcity are powerful narratives. They attract capital, talent and media attention, which in turn attract more capital. Stories do not replace cash flows, but they can pull forward years of expected returns.

Are we truly richer, or are the numbers just bigger?

Both things can be true. In nominal terms, accounts are larger. In real terms, it depends. If your assets outpaced inflation and currency moves, you are richer. If not, you may simply be treading water with flashier statements.

Two points for context:

• Real returns matter. After fees, taxes and inflation, what is left?
• Concentration risk is rising. A handful of firms now drive a large share of global equity market cap and earnings expectations.

Could this continue – and what could break it?

What keeps it going

• AI demand keeps surprising to the upside, with monetisation broadening beyond chips into software and services.
• Soft-landing economics: inflation trends lower, growth holds up, and rate cuts arrive gradually.
• Ongoing buybacks and passive inflows keep the bid strong.

What could crack it

• Re-acceleration in inflation that forces tighter policy and higher real yields.
• Earnings disappointments or guidance cuts from AI bellwethers.
• Regulatory shocks, geopolitics or a credit accident that widens spreads and drains liquidity.
• IPO unlocks and insider selling increasing free float into a tired tape.

How I am approaching these markets as a UK investor

Process over prediction

• Rebalance with bands. Trim positions that run far past target weights and top up laggards. It forces you to sell a bit of euphoria and buy a bit of gloom.
• Keep dry powder. A ladder of short-dated gilts or money market funds provides optionality without sitting entirely in cash.
• Dollar-cost average on a schedule. It removes the temptation to chase green candles or panic on red ones.

Portfolio construction

• Barbell quality and value. Own high-quality compounders and AI beneficiaries, but offset with cash-generative value, defensives and UK small caps that are still cheap.
• Diversify by region and factor. Do not let 5-10 US names become your whole future. Europe, Japan and select EM can provide different cycles and drivers.
• Real assets and inflation protection. Consider some gold or commodities and UK index-linked gilts to balance equity duration risk.
• Crypto sizing. If you hold it, size it small enough that a 70% drawdown does not derail your plan. Rebalance gains.

Tactics for the current tape

• Be patient with IPOs. Parabolic day-one moves often mean tiny floats. Better entry points usually arrive after lock-ups expire.
• Watch currency. A strong US dollar can flatter US equity returns for UK investors, and vice versa. Decide whether to hedge.
• Prefer free cash flow to promises. In hot markets, cash discipline is your friend.

UK-specific angles: opportunities and risks

The UK market still trades at a discount to the US. That is partly justified by sector mix, but not entirely. There are sensible opportunities in domestics, insurers, energy and unloved small caps, especially where buybacks cancel shares and dividends are covered by cash flows.

On the resources side, cycles can be violent. If you are exploring the commodity complex beyond gold – for example energy names – do your homework on project risk, permitting and funding. I recently covered one such case, which highlights why timelines and capital structure matter as much as commodity prices. See: Rockhopper Exploration 2024 results and Sea Lion update.

Bottom line: respect momentum, respect risk

Markets can stay strong longer than sceptics expect, especially when earnings and liquidity line up. But parabolic moves pull returns forward and raise fragility. You do not need to predict the top to invest well.

Have a plan, rebalance without drama, and size your risks so you can hold through the next drawdown. If the AI story keeps delivering, you will own enough. If it falters, you will still be standing.