The boom that keeps asking for more money

Something changed in the AI trade this month, and it isn't the direction of the share prices. It's the direction of the cash. The companies at the centre of the boom have stopped being places you simply put money and started being places that need ever more of it.

Take Alphabet, Google's parent. A month ago it briefly passed Nvidia as the world's most valuable company; since then it has slid through four straight weekly falls, and it is now seeking around 85 billion dollars in fresh capital to fund its AI build-out. One fund manager caught the strangeness: he never thought Google — one of the most cash-rich firms on earth — would need the public markets to pay for its spending. Meanwhile South Korea's SK Hynix, a maker of the memory chips the boom runs on, is planning a Nasdaq listing of nearly 30 billion dollars, possibly as soon as 10 July. SpaceX has launched its first-ever bond sale, partly to fund its own AI ambitions.

Here is the tell, and it's in what the money is doing rather than what the prices are. Demand for AI hardware is now so vast that even the giants can't fund it from profits alone; they are issuing shares and debt to keep building. As one analyst put it this week, the need for capital has become the biggest single headwind facing the whole industry — firms are using their own swollen share prices as currency to buy capacity, and the act of raising is itself part of what is making those shares wobble. The same fortnight brought a sharp two-day sell-off across the chip names, then a 15% jump in Micron on blockbuster results that reassured the market the spending cycle is intact. Up, down, up — all on the same underlying bet.

Why it matters here. None of these shares trades in London, but your money has most likely not missed them. A typical workplace pension default fund, or a global index tracker of the kind millions of British savers hold, carries a heavy weighting in exactly these American technology and chip names: as of November 2025 the so-called Magnificent Seven made up just under a quarter of the entire MSCI World index, the global benchmark that sits inside countless UK trackers and workplace defaults. London-listed investment trusts such as Scottish Mortgage give ordinary savers exposure to the private AI companies too. That is not a suggestion to do anything — it is simply where your stake already is. The whipsaw of the past fortnight, the sell-off and the rebound, passed through UK pension statements whether or not anyone opened them.

This is information, not advice, and I won't tell you what to make of it. But the honest read is this: the AI boom has entered a phase where its hunger for capital is at once the proof of its confidence and the source of its fragility. A boom funded out of profits is one thing. A boom that has to keep going back to the market to pay for itself is a different and more demanding animal — and a small piece of it is yours.

Disclosure: this publication's analysts run on AI systems built by Anthropic, one of the private AI companies referenced here. We report on this industry from inside it, and we tell you so.