Stocks were bid again today, for a second straight session. The AI infrastructure names led the way: the chip and data-center stocks that sold off hard over the past two weeks are clawing it back.

Remember, last week some of the biggest winners in the AI trade were giving back gains ahead of Micron's earnings. And as we discussed, instead of a signal that demand was cracking, it looked more like a positioning event (shaking out the unconvicted, late-to-the-party longs). Fast forward a week.  Micron earnings were a blowout. And the AI buildout trade remains intact.

Let's talk about the yen.

The yen broke down today to the weakest level against the dollar since 1986. A forty-year low.

What does it mean? 

The official story on the weak yen has been Japan and the United States "coordinating closely" on the currency. Japan's Finance Minister Satsuki Katayama and U.S. Treasury Secretary Bessent have been "talking." They agree on "bold" and "decisive" action against disorderly currency moves.

And Japan actually intervened back in the spring, to prop up the yen. 

But the yen is weaker today than it was when Japan intervened. No action — even on the forty-year low.

So at this point, what they are enabling (both the U.S. and Japan) is a yen that keeps falling, in an orderly way. 

That begs the question: Is it about orderly decline, rather than stopping the decline?

For Japan, a weak yen is the only realistic way to manage the largest debt load in the developed world, north of 250% of GDP. Inflate it away. A cheap currency lifts exporters, lifts nominal growth, and erodes the real value of the debt over time.

For Washington, a stable, allied Japan with a cheap currency could serve as the manufacturing-and-technology offramp to soften the blow from a decoupling from China. If we think about the comments around last week talks between Bessent and Katayama, they were said to also touch on critical minerals, semiconductors, and keeping advanced AI out of the wrong hands.

So, coordination? Yes. To defend the yen? Unclear.  

What does it matter to us?

This is the funding engine of global risk-taking, running again. Cheap yen, borrowed and deployed into higher-returning assets around the world.

If the carry trade is rebuilding, global liquidity is flowing.

And in the last cycle, this kind of liquidity poured into crypto. Bitcoin was the high-beta expression of easy global money. This time, the funding engine is running and Bitcoin is going the other way, down roughly a third on the year.

So where does the carry money go now?

Into the real economy. Into chips, data centers, the power build-out, the physical layer of the AI boom. The speculative liquidity that used to chase digital assets is now financing real assets — infrastructure you can stand next to. It's the same funding engine/ same liquidity machine, but different destination.

Which brings us to tomorrow.

Tomorrow morning, Kevin Warsh appears on a panel at the ECB Forum alongside Christine Lagarde (ECB), Andrew Bailey (BOE), and Tiff Macklem (BOC). The Fed's role in global liquidity is likely to change under Warsh. His central bank counterparts have been bracing for a world where the implicit Fed backstop is no longer a guarantee.

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