The Weighting

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There is a committee in New York that can force the purchase of tens of billions of dollars of a single stock, on a date it announces in advance, at whatever the price happens to be that day.

A committee in New York▶ ≈0:00

It is not a hedge fund. It runs an index. And in December of two thousand twenty, it pointed at the car company that had nearly missed payroll twelve years earlier, and every index fund in America started buying, because the rules said they had to.

This is episode nine, and it teaches three things: what a stock index is and why trillions of dollars follow it automatically, what short selling costs when the trade goes against you, and what a price is, which sounds like philosophy and is the most practical question in investing.

Seventeen dollars a share▶ ≈1:00

Begin the decade where episode eight ended, with Tesla alive by a wire.

In June of two thousand ten, Tesla went public at seventeen dollars a share. It was the first American automaker to hold an initial public offering since Ford, in nineteen fifty-six. The filing, like PayPal's before it, said the honest things in writing: unprofitable, capital-hungry, competing against giants a hundred times its size. Musk, as at PayPal, was the largest shareholder, and this time he was also the chief executive, and nobody could deliver letters to a board he effectively anchored. Zip2 and the honeymoon coup had written that rule into him, and the ownership structure of everything he has run since is the scar tissue.

For most of the following decade, Tesla was the most publicly doubted large company in America. It lost money for years. It missed production deadlines. It flirted with collapse again in the crush of two thousand eighteen, which Musk has called the most painful year of his career. And it attracted, in enormous size, a specific kind of opponent: the short seller.

The danger has no ceiling▶ ≈2:20

Short selling deserves a clean explanation, and our Jesse Livermore profile covers the craft in full; here is the mechanism in one breath. A short seller borrows shares, sells them, and hopes to buy them back cheaper before returning them. The profit is the fall. The danger is the rise, and the danger has no ceiling: a stock can only fall to zero, but it can rise without limit, and every dollar of rise comes directly out of the short seller's pocket. For years, by the estimates of the firms that track short interest, Tesla carried one of the largest short positions of any stock on earth. Serious, credentialed investors argued in public that the company was worth a fraction of its price, and some argued it was worth nothing. Their reasons were not stupid: the losses were real, the deadlines were missed, the giants were coming.

Then came two thousand twenty. Tesla turned consistently profitable by its own reported accounts, kept growing through a pandemic that froze its industry, and the stock rose more than seven hundred percent in a single year. The short sellers, in aggregate, lost an estimated thirty-eight billion dollars that year, which the firms that track those positions called one of the largest losses ever recorded against a single stock. Livermore, who died broke, could have told them the arithmetic: being right too early is the same as being wrong, and the market can stay against you longer than you can stay solvent. Whatever Tesla was worth, the people betting on its fall ran out of year before the stock ran out of rise.

The thermometer became the furnace▶ ≈4:25

Now the committee, and the teaching object the episode is named for.

A stock index, like the S and P five hundred, is a list: five hundred large American companies, chosen by a committee against published criteria, including a track record of profitability. The index began as a measurement, a thermometer for the market. But over fifty years, something enormous happened, which our Jack Bogle profile tells from the beginning: trillions of dollars moved into funds that simply buy the list. The thermometer became the furnace. When the list changes, the money must move, automatically, by rule, without an opinion anywhere in the chain.

Tesla, newly profitable on paper, finally met the criteria, and in November of two thousand twenty the committee announced it would join the index the following month. Consider what that announcement is. It is advance, public notice that index funds, which do not choose, would be buying, by the estimates of the time, tens of billions of dollars of one specific stock on one specific day, at whatever price the market set. Everyone could see the buyer coming. The stock climbed for weeks into the event, and on the last trading day before inclusion, it closed at what was then its all-time high, with a surge of buying concentrated in the final minutes as the index funds completed their required purchases. Tesla entered the S and P five hundred as one of its largest members ever added, valued that week at more than six hundred billion dollars, more by market value than the next several automakers on earth combined.

If you own an index fund, a target-date fund, most retirement accounts of any kind, you were probably one of the buyers that day. Nobody asked you. That is the bargain of indexing, stated honestly: you get diversification, low cost, and the market's long record, and you give up the deciding. Your fund bought Tesla that Friday because Tesla was on the list, at a price that was, by definition, whatever the moment demanded. The bargain has been a favorable one for patient investors over the periods on record, and it comes with terms, and the terms are worth knowing.

An argument about the future▶ ≈7:10

Now the third teaching object, the one this episode has been circling. What is a price?

A price is not a fact about a company. It is the market's current claim about the company's entire future, compressed into one number. When a company is valued at more than every rival combined while producing a small fraction of their cars, the price is asserting something specific: that the future will look radically different from the present, that the small fraction becomes a large one, that the profits of an entire industry migrate. When the short sellers bet against it, they were asserting the opposite future. The decade-long fight over Tesla's price was never really an argument about cars in a parking lot. It was an argument about the future, conducted with money, in public, and it stayed one of the most argued prices in the world.

Right on the facts, still lost▶ ≈8:15

This series takes no side in that argument, and the discipline matters more than the diplomacy: nothing in this episode is a claim about what the stock is worth today. What the series does say, because it is the record, is this. The man priced his own downside at a dollar a day in a grocery store, and thirty years later the market was pricing his company's future at sums with twelve zeros, and the fiercest, best-funded skeptics of his era paid thirty-eight billion dollars in a single year for betting against him. The audit beat almost writes itself: the legend says the shorts were fools, and the record says something sharper. They were often careful, informed, and correct about the individual facts, and they still lost, because they were betting against a future that a relentless founder, with an unusually free hand at his own company, refused to let arrive on schedule.

One asset in his empire, though, never had a public price at all. No ticker ever carried it, and no one could ever bet against it, because you cannot short what you cannot buy. It became, by reported valuations, the most valuable private company on the planet, and the reason you could not own a share of it, for twenty-four years, was a single form, filed quietly, year after year, with the S E C.

That form, the fortune it guards, and the end of this series' ledger, is episode ten. The Exemption.