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A short talk in lieu of a post. Back on full duty tomorrow.

Transcript:

Hi, Paul Krugman here.

I’m recording this on Tuesday afternoon. I just won’t have time to write a normal post for tomorrow when you’ll see this. And I would take the day off, except it seemed to me as if people might want some reaction to the carnage that’s been going on, at least in part of the tech sector and stock markets around the world, which has been pretty remarkable.

It’s really tempting to say that it’s deeply meaningful. But in general, you want to be very cautious about putting too much stake in stock market events. I’ll come back to that in a minute. But it is striking enough that it does seem to be worth commenting on.

So what’s happened? There’s been a fall in tech stocks very much concentrated in semiconductors. The Philadelphia Semiconductor Index was down almost 8%. on Tuesday. The KOSPI Korean Index, which is largely a semiconductor index, was down just about 10% sort of the previous day or the same day, you know, time zones. And there was a 2.2% fall in the NASDAQ. We’ve seen a lot of decline in tech stocks, things related above all to chips. What’s going on there?

Part of the answer is that trying to understand why the market does what it does is, generally speaking, a mug’s game. In this case, however, it does seem that part of what’s happening, probably a large part of what’s happening, is that the tone, the rhetoric surrounding use of AI, and hence the demand for compute, has really shifted quite a lot just very recently.

All of a sudden, we have a spate of studies that seem to show that, yeah, AI models allow people to churn out a lot more stuff, but the actual payoff to that stuff is much, much smaller than the volume of stuff that they’re churning out, most obviously lines of code, but just in general. AI lets you do much more, but how productive that is in terms of the ultimate goals of a business, let alone economic growth and quality of life is much more doubtful.

On top of that you have a rather abrupt, jarring turn in business strategy. Up until just the other day a lot of businesses were more or less whipping their workers into using AI — you know, we’re going to judge you on how much you’re using AI whether or not you really want to whether or not you yourself think it’s valuable. We’re actually going to score you, we’re going to require that you do tokenmaxxing.

And then, with compute getting scarce and with the price of chips having gone through the roof, suddenly the AI companies began charging and the marginal cost of using a lot of tokens became really, really very high. And suddenly companies were saying, oh wait, stop. We want you to economize on your use of tokens and hence to ultimately reduce the demand for compute. And that’s a sudden U-turn.

This is part of a broader phenomenon, which I’m going to write about very soon, which is that there is a kind of lack of organicness to the AI boom.

There are people who are using it because it looks great. They’re using it because it’s fun. I have colleagues who are just mucking around with Claude and finding some uses for it. But there’s also a large amount of Corporate America that thinks that this is the way it has to go. Fear of missing out, not by the individual investor, but by the corporate bureaucracy. And then pressure from the financial markets, saying, you know, your company better be on the cutting edge of AI or else. All of which is very fragile. It’s a kind of a bubble, but not in the normal sort of asset price form. It’s more of a kind of fad, almost a social delusion. And that, it seems likely, certainly got ahead of itself.

Now, I’m reading way too much into these stock prices. And so let me give you