Eight trading days lay between the “crash” and the “coronation” – between a trillion dollars in losses for the AI giants and the S&P 500’s twenty-third record high this year. The best first half of the year since 2021 sounds like a reason to celebrate – until you remember what 2021 was actually like. While New York celebrated its record, the Japanese yen fell unnoticed to a 40-year low, bringing into focus a question that no quarterly report can answer: Who will be next in line when the music stops?
It was, as the French say, a week to lose one’s Latin. Ten days ago the newspapers were printing the word crash, a trillion dollars had left the artificial-intelligence giants, and this column argued that what looked like a collapse was really a sorting. This week the same market closed at an all-time high. The S&P 500 crossed 7,600 for the first time in its history, its twenty-third record of the year. The burial and the coronation were eight sessions apart. Anyone trying to hold both in their head at once may be forgiven a moment of vertigo.
Step back to the half-year scoreboard and the mood only intensifies. The first six months of 2026 were the best first half for American shares since 2021. The Dow rose about nine per cent, the S&P around ten, the Nasdaq nearly thirteen, and the energy sector, still riding the oil shock this column has tracked since the spring, gained a remarkable thirty-eight per cent. Presented on its own, that is a picture of rude health. But notice the comparison being made. The best first half since 2021 invites you to admire it, until you remember what 2021 actually was: a market levitated by the tidal wave of money printed to carry the world through the pandemic, the greatest monetary expansion in peacetime history, the sugar rush of the Covid recovery before the bill arrived as the worst inflation in forty years. To say this is the strongest half since then is not quite the compliment it sounds. It is to say the market has not been this exuberant since the last time it was drunk on freshly printed money. And a number is in any case only as honest as the moment it is measured. This one was measured on the thirtieth of June, which is not an innocent date.
The photograph taken on the last day of the quarter
Here is something the celebratory write-ups tend to leave out. The end of a quarter, and above all the end of a half-year, is when the professionals are photographed. Fund managers, banks and the great institutions are judged on the snapshot of their holdings taken on the final day, the one that goes into the report the clients will read. And so the final days of a quarter are spent, quietly and universally, making sure the photograph flatters. Managers buy the stocks that have already won, so their filing shows them owning the names everyone was talking about. They hold the line on anything wobbling. They avoid, at almost any cost, being the one whose book shows red on reporting day. The industry has a polite term for this, window dressing, which is a very genteel phrase for arranging the furniture before the guests arrive.
This is why genuine surprises are so rare at the close of a quarter or a half. It is not that the world turns benign on cue. It is that almost everyone whose bonus depends on the snapshot has the same incentive at the same moment, to keep the picture green until the shutter clicks. Some part of last week’s vault from panic to record high, then, was not the market delivering a considered verdict on the economy. It was the calendar. The dip of ten days ago was bought back with particular enthusiasm precisely because it arrived just before the one day of the season when no professional can afford to let the numbers sag. The rally is real in the sense that the prices are real. It is worth asking how much of it would have happened in the third week of a quarter rather than the last.
A planet on steroids
What allowed the rebound to be so violent is the condition underneath all of it, which is leverage. The planet is, to put it plainly, on steroids. Borrowed money is everywhere: in the margin accounts of retail traders, in the balance sheets of funds that lever every position several times over, in the options market where a small premium controls a large exposure. In a system this geared, a dip is not a warning to be heeded but an opportunity to be seized, because everyone has been trained, and financed, to buy it. That is how a market falls out of the sky one week and prints a record the next. It is not conviction. It is momentum wearing conviction’s clothes.
The definitive description of this state of mind was given nineteen years ago, and it is worth quoting exactly. In July 2007, on the very eve of the financial crisis, Chuck Prince, then the chief executive of Citigroup, was asked whether the party in cheap credit could last. “When the music stops, in terms of liquidity, things will be complicated,” he said. “But as long as the music is playing, you’ve got to get up and dance. We’re still dancing.” Four months later Citigroup was writing down billions and Prince was gone. The line survives because it is the honest anthem of every leveraged bull market. Everyone on the floor knows the music will stop. No one can afford to be the first to leave, because the returns are made by those who dance longest, right up until the ones made poorest are those who danced a beat too long.
The thing nobody mentioned, in Tokyo
Prince, as it happens, delivered that famous line in Japan. And Japan is exactly where this week’s real story sits, almost entirely unremarked. While the financial press busied itself garlanding the S&P’s record, the Japanese yen fell past 162 and a half to the dollar, its weakest level since 1986. That is a forty-year low in the currency of the world’s fourth-largest economy, and it passed with barely a raised eyebrow. A record high in New York is a headline. A four-decade low in Tokyo, apparently, is a footnote. The asymmetry itself should give one pause.
It matters because of a mechanism called the carry trade, which is the quiet engine of much of the leverage described above. In plain terms it works like this. You borrow money in yen, where it costs almost nothing, because Japan has kept interest rates on the floor for a generation. You convert those yen into dollars and buy dollar assets that pay you far more. You pocket the difference between what you pay to borrow and what you earn to hold, and if the yen falls while you do it, you make a second profit when you convert back. A cheap and steadily sinking yen makes this the most attractive trade in the world, and so an ocean of borrowed yen sloshes out of Tokyo and into everything else, including the American shares now sitting at a record. The calm that let the quarter close so prettily is financed, in no small part, by money borrowed in a currency in free fall.
Where the music is actually wired
This is the part worth watching, because the carry trade is not only the engine. It is also the wiring of the sound system. When the yen is weak and falling, the trade swells and feeds the party. But when the yen suddenly turns, through an intervention, a surprise from the Bank of Japan, or simply a scare that sends money running for safety, the whole thing unwinds at once. Everyone who borrowed yen must buy yen back to repay the loan, and to do that they sell the dollar assets they bought, all together, in a hurry. We saw a rehearsal of this two summers ago, when a modest rally in the yen set off a violent global sell-off in a matter of days and briefly convinced everyone the world was ending. The weaker the yen goes now, and the fatter the carry trade grows, the more tightly that spring is wound.
And note what Japan has already tried. The authorities spent something like seventy billion dollars defending the currency this spring, and the Bank of Japan lifted its interest rate to one per cent, and still the yen sinks. When a great state spends that kind of money to hold a line and the line keeps giving way, it is telling you the pressure is structural rather than a passing squall. The very thing propping up the record, the flood of cheap yen, is being produced by a weakness its own government cannot arrest.
What to watch, and how
So by all means note the record, but read it honestly. A record high struck in the last days of a half-year, dressed for the photograph, financed by borrowed yen, with leverage in every corner and the fear gauge asleep, is not the same animal as a market that has calmly earned its level. It may keep rising. Momentum of this kind usually does, for longer than the cautious expect, which is precisely what makes it dangerous. The instrument to watch through the summer is not the S&P at 7,600. It is the yen at 162, because that, and not the index, is where the volume knob on the music sits.
The professionals will tell you the picture has never looked better, and for once they are not lying, because they spent the last week of June making sure of it. The rest of us are entitled to remember what Chuck Prince learned the hard way. As long as the music plays, everyone dances, and the record highs are real, and the returns are real. The only question on Planet Finance, the one no window dressing can answer, is who is standing nearest to the door when the music stops.
Eric Lefebvre
See also: Falling Doesn’t Mean Breaking Down
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